What is the increase in the average temperature of the atmosphere surrounding earth?.

Answers

Answer 1

The average temperature of the atmosphere surrounding Earth has increased by about 1 degree Celsius since the pre-industrial era.

Over the past century, the Earth's surface temperature has risen by approximately 1 degree Celsius, with the majority of warming occurring in the past few decades. This increase in temperature is primarily caused by human activities, such as burning fossil fuels and deforestation, which release greenhouse gases into the atmosphere. These gases trap heat from the sun, causing the planet to warm.

The consequences of global warming include rising sea levels, more frequent and severe weather events, and damage to ecosystems and agriculture. Addressing the issue of global warming requires collective action on a global scale, with efforts to reduce greenhouse gas emissions and transition to cleaner, renewable energy sources.

Learn more about ecosystems here:

https://brainly.com/question/13979184

#SPJ11


Related Questions

What kind of apparatus did boyle use to determine that relationship.

Answers

Boyle used a J-shaped glass tube and a mercury-filled cylinder to determine the relationship between pressure and volume.


Boyle's apparatus consisted of a J-shaped glass tube, one end of which was closed and the other end was open. The open end of the tube was placed in a mercury-filled cylinder. The air was trapped in the tube by the mercury, and the pressure was measured using a mercury barometer.

By adding weights to the top of the mercury column, Boyle was able to increase the pressure on the air inside the tube. As the pressure increased, the volume of the air decreased. By measuring the volume of the air at different pressures, Boyle was able to determine the relationship between pressure and volume, which is now known as Boyle's Law. This law states that at a constant temperature, the volume of a gas is inversely proportional to its pressure.

Learn more about Boyle's Law here:

https://brainly.com/question/1437490

#SPJ11

where does an amide group want an electrophilic aromatic substitution to occur?

Answers

An amide group is substituted directly into the location on the aromatic ring that is opposite to it in electrophilic aromatic substitution.

Why does aromatic amine electrophilic substitution occur?

By delocalizing the lone pair of electrons from the N-atom over the aromatic ring, the NH2 group of aromatic amines powerfully activates the aromatic ring. Aromatic amines are more easily subject to electrophilic substitution reactions than benzene because of the high activating effect of the -NH2 group.Directors in ortho/para are activated by amide groups.

In organic reactions known as electrophilic aromatic substitutions, an atom that is affixed to an aromatic ring is replaced by an electrophile. These reactions frequently include the replacement of an electrophile atom with a hydrogen atom from a benzene ring.

To learn more about lone pair use:

https://brainly.com/question/3915115

#SPJ4

How can we accommodate smaller flasks in a heating mantle?

Answers

To accommodate smaller flasks in a heating mantle, there are a few options you can consider. Firstly, you can use a flask adapter. Flask adapters are designed to fit smaller flasks into the heating mantle, while still providing enough stability to prevent spills or accidents.

These adapters are usually made from high-quality materials like stainless steel or glass, and they come in a range of sizes to accommodate different flask sizes.
Another option you can consider is using a heating mantle with an adjustable sleeve. Some heating mantles come with an adjustable sleeve that can be used to hold smaller flasks in place. The sleeve is designed to fit around the flask and provide enough support to prevent it from slipping or falling over during heating.
Lastly, you can consider using a heating mantle with multiple heating zones. Heating mantles with multiple heating zones allow you to heat different sections of the mantle independently. This means that you can use one section of the mantle to heat a larger flask, while using another section to heat a smaller flask.
In summary, to accommodate smaller flasks in a heating mantle, you can use flask adapters, adjustable sleeves, or heating mantles with multiple heating zones. All of these options provide enough support and stability to ensure that your smaller flasks are heated safely and effectively.

learn more about heating here

https://brainly.com/question/30407538

#SPJ11

Which of the following is an Arrhenius base?
A. KNO3
B. H2SO4
C. C6H12O6
D. KOH

Answers

Answer:

the answer is KOH (d) thanks

which of the following pairs of species would generate a salt derived from a weak acid and a weak base?select the correct answer below:hi and k3po4hbr and kch3cooh2o and naohnano2 and h2co3

Answers

HBr and KCH3COOH would generate a salt derived from a weak acid and a weak base.

What is salt?

Salt is a mineral composed primarily of sodium chloride (NaCl), a chemical compound belonging to the larger class of salts; salt in its natural form as a crystalline mineral is known as rock salt or halite. Salt is present in vast quantities in seawater, where it is the main mineral constituent. Salt is essential for life in general, and saltiness is one of the basic human tastes. The tissues of animals contain larger quantities of salt than do plant tissues. Salt is one of the oldest and most ubiquitous food seasonings, and salting is an important method of food preservation.

To learn more about salt

https://brainly.com/question/20835655

#SPJ4

**Compare the strength of van der Waal forces of H2S and H2Te

Answers

As a result, the acidic strength of H₂ S is lower than that of H₂Te due to the difficulty of hydrogen ion removal in H₂ S.

Van der Waals forces, which attract neutral molecules to one another in gases, liquefied and solidified gases, and almost all organic liquids and solids, are relatively weak electric forces.

Which powers are van der Waals powers?

In addition to other intermolecular forces, van der Waals forces include the forces of attraction and repulsion between atoms, molecules, and surfaces. In contrast to covalent and ionic bonding, they are triggered by correlations in the varying polarizations of nearby particles (a result of quantum dynamics), which makes them unique.

Learn more about Van der Waals :

brainly.com/question/11457190

#SPJ4

Koh(s) co₂(g) → k₂co₃(s) h₂o(l) calculate the mass in grams of koh that will be required to produce 145 grams of k₂co₃

Answers

According to the equation, KOH + [tex]CO_2[/tex] → [tex]K_2CO_3[/tex] + [tex]H_2O[/tex], the mass of KOH that will be required to produce 145 grams of [tex]K_2CO_3[/tex] is 58.84 g

2 KOH + [tex]CO_2[/tex] → [tex]K_2CO_3[/tex] + [tex]H_2O[/tex] is the given equation.

Using Stoichiometry,

Two moles of KOH produce one mole of [tex]K_2CO_3[/tex]

Molar mass of KOH = 56 g

Molar mass of [tex]K_2CO_3[/tex] = 138 g

Since 2 moles of KOH are given, thus 56 * 2 = 112 g

Thus, 138 g of [tex]K_2CO_3[/tex] requires 112 g of KOH

1 g of [tex]K_2CO_3[/tex]  requires 112 / 138 g of KOH

= 0.811 g of KOH

145 g of [tex]K_2CO_3[/tex] requires 0.811 * 145 g of KOH

=117.68 g of KOH

Learn more about Stoichiometry:

https://brainly.com/question/30641314

#SPJ4

At stp, which 4. 0-gram zinc sample will react fastest with dilute hydrochloric acid?.

Answers


At STP (Standard Temperature and Pressure), the reaction rate between a metal and an acid is determined by several factors including the size of the metal sample, the concentration of the acid, and the temperature. In this case, we are given a 4.0-gram zinc sample and dilute hydrochloric acid.

Zinc is a reactive metal and readily reacts with hydrochloric acid to form zinc chloride and hydrogen gas according to the following chemical equation:

Zn + 2HCl → ZnCl₂ + H₂

To determine which 4.0-gram zinc sample will react the fastest with dilute hydrochloric acid, we need to consider the surface area of the zinc. The greater the surface area, the faster the reaction rate. This is because a larger surface area provides more contact points for the acid to react with the zinc.

One way to increase the surface area of the zinc sample is to use a powdered form instead of a solid chunk. Powdered zinc has a larger surface area than a solid chunk of the same mass.

Therefore, a 4.0-gram powdered zinc sample will react faster with dilute hydrochloric acid compared to a 4.0-gram solid chunk of zinc.

Another factor to consider is the concentration of the acid. The more concentrated the acid, the faster the reaction rate. Dilute hydrochloric acid has a lower concentration of hydrogen ions compared to concentrated hydrochloric acid. This means that the reaction rate will be slower with dilute acid compared to concentrated acid.

Finally, the temperature also affects the reaction rate. Increasing the temperature of the acid will increase the kinetic energy of the molecules, which in turn increases the frequency of collisions between the zinc and acid molecules. This will result in a faster reaction rate.

In conclusion, to determine which 4.0-gram zinc sample will react the fastest with dilute hydrochloric acid at STP, we need to consider the surface area of the zinc, the concentration of the acid, and the temperature. A 4.0-gram powdered zinc sample will react faster than a 4.0-gram solid chunk of zinc. However, the reaction rate can be further increased by using a more concentrated acid and increasing the temperature.

To know more about STP, visit:

https://brainly.com/question/24050436

#SPJ11

Which of the following illustrates how the intrinsic chemical properties of a reactant affect reaction
rate? (select all that apply)
Select all that apply: A. Calcium reacts with water at a moderate rate to form hydrogen gas and a base, whereas sodium reacts in a similar way
in mere seconds. â¢
B. Awooden headboard burns more
quickly in a fire than an iron headboard. â¢
C. Phosphorus burns much more rapidly in an atmosphere of pure oxygen than in
air. D. Zinc dust reacts more rapidly with hydrochloric acid than a large solid piece
of zinc.

Answers

According to the question the correct answer is  A wooden headboard burns more quickly in a fire than an iron headboard.

What is fire?

Fire is a chemical reaction that involves the oxidation of a fuel source, typically in the form of hydrocarbons, which produces light, heat, and smoke. It is a natural process that has been used by humans for centuries to provide light, heat, and cooking. Fire is an important part of the Earth’s ecology, helping to clear out dead vegetation and allowing new growth. It is also used for purification and in ceremonies. Fire can be very dangerous and cause serious destruction and injury if not managed properly. Fire safety is extremely important, as even a small spark can cause a huge blaze if not extinguished quickly. Firefighters are trained to deal with fires, utilizing specialized equipment and techniques to control and put out fires. Fire can also be harnessed to create electricity and provide power for homes, businesses, and industry.

To learn more about fire

https://brainly.com/question/29849721

#SPJ1

Answer: The CORRECT answers are Calcium reacts with water at a moderate rate to form hydrogen gas and a base……and a wooden headboard burns more quickly in a fire than an iron headboard

A 100.0 mL sample of 0.180 M HClO 4 is titrated with 0.270 M LiOH. Determine the pH of the solution after the addition of 75.0 mL of LiOH.
2.65
1.89
11.35
13.06
12.1

Answers

The pH of the solution after the addition of 75.0 mL of LiOH is calculated as  12.1 .

Option E is correct.

The pH of an answer is a proportion of hydrogen particle focus, which thusly is a proportion of its causticity. Unadulterated water separates somewhat into equivalent groupings of hydrogen and hydroxyl (OH−) particles

100 ml of 0.180 M HClO₄ = [tex]\frac{0.180mol}{1 L}[/tex] × 0.1 L

                                       = 0.018 mol

75 ml of 0.270 M LiOH = [tex]\frac{0.270 mol}{1 L}[/tex] × 0.075 L

                                      = 0.02025 mol

      HClO₄ + LiOH      ⇒   LiClO₄ + H₂O

      0.018      0.0202       0            0

     - 0.018      -0.018        + 0.018

                        pOH = - log [ OH ⁻]

                         = - log ( 0.0126)

                             = 1.90

       [OH⁻]   = 0.0022/ 0.175 M

                   = 0.0126 M

                              pH =  14 - pOH

                               =  14 - 1.90

                                   = 12.1

pH is defined in what way?

a measure of a substance or solution's acidity or basicity. The pH scale ranges from 0 to 14. A pH of 7 is neutral on this scale, meaning that it is neither acidic nor basic. A pH worth of under 7 methods it is more acidic, and a pH worth of in excess of 7 methods it is more essential.

Why is pH so crucial?

The chemical conditions of a solution are reflected in the pH, an important quantity. Chemical behavior, microbial activity, the availability of nutrients, and biological functions are all influenced by pH.

Learn more about pH level:

brainly.com/question/172153

#SPJ4

How much heat is absorbed when 50.00 g of C(s) reacts in the presence of excess SO2(g) to produce CS2(l) and CO(g) according to the following chemical equation? 5C(s) + 2SO2(g) → CS2(l) + 4CO(g) ΔrH° = 239.9 kJ

Answers

When 50.00 g of C(s) combines with excess [tex]SO_{2}[/tex](g) to create [tex]CS_{2}[/tex](l) and CO(g), approximately 191.92 kJ of heat is absorbed.

How much heat is absorbed int the given reaction?

To calculate the amount of heat absorbed during the given reaction, we need to first determine the moles of C(s) consumed in the reaction.

The molar mass of carbon is 12.01 g/mol. Therefore, the number of moles of C(s) present in 50.00 g can be calculated as:

moles of C(s) = Mass of C(s)/Molar mass of C(s)

moles of C(s) = 50.00 g/12.01 g/mol

moles of C(s) = 4.165 mol

From the balanced chemical equation, we know that 5 moles of C(s) reacts with 2 moles of [tex]SO_{2}[/tex](g). Therefore, the number of moles of [tex]SO_{2}[/tex](g) required for the given amount of C(s) can be calculated as:

moles of [tex]SO_{2}[/tex](g) = (2/5) * moles of C(s)

moles of [tex]SO_{2}[/tex](g) = (2/5) * 4.165 mol

moles of [tex]SO_{2}[/tex](g) = 1.666 mol

Since [tex]SO_{2}[/tex](g) is present in excess, it will not be completely used up in the reaction.

Now, using the balanced chemical equation, we see that 5 moles of C(s) produces 239.9 kJ of heat. Therefore, the heat absorbed when 4.165 moles of C(s) reacts can be calculated as:

Heat absorbed = (239.9 kJ/5 mol) * 4.165 mol

Heat absorbed = 191.92 kJ

When 50.00 g of C(s) combines with excess [tex]SO_{2}[/tex](g) to create [tex]CS_2[/tex](l) and CO(g), roughly 191.92 kJ of heat is absorbed.

To learn more about Heat absorbed, visit: https://brainly.com/question/30361927

#SPJ4

How does the concentration of ions in a strong base differ from a weak base.

Answers

The concentration of ions in a strong base is higher than in a weak base. Strong bases dissociate completely in water, while weak bases only partially dissociate.

Strong bases, such as sodium hydroxide (NaOH) and potassium hydroxide (KOH), are 100% ionized in water. This means that they completely dissociate into their respective ions: Na+ and OH- or K+ and OH-. Therefore, the concentration of these ions in a strong base is much higher than in a weak base. Weak bases, on the other hand, only partially dissociate in water.

For example, ammonia (NH₃) only partially dissociates into NH₄+ and OH-. This means that the concentration of NH₄+ and OH- ions in a weak base is lower than in a strong base. The strength of a base is determined by its ability to accept protons (H+ ions), and the degree of dissociation in water plays a significant role in this ability. Strong bases have a higher affinity for protons than weak bases, making them more effective at neutralizing acids.

Learn more about ions here:

https://brainly.com/question/1488567

#SPJ11

6. Amides can be prepared in one step by reacting an amine with a. a carboxylic acid c. an acid chloride e. an alcohol b. an aldehyde d. a bromohydrin

Answers

Amides can be prepared in one step by reacting a carboxylic acid and an amine, an acid chloride and an amine, or an alcohol and an acid chloride.

What is chloride?

Chloride is an anion made up of one chlorine atom and one electron. It is the most abundant halide ion found in nature and is found in many chemical compounds. In the human body, it is present in the blood and other fluids, and is also necessary for the production of hydrochloric acid in the stomach. Chloride is an essential electrolyte and helps to balance the acid-base balance in the body. It also helps to regulate the amount of water in the body and is necessary for proper nerve and muscle function. Chloride is also essential for the elimination of waste products from the body and for keeping the skin and other tissues healthy.

The reaction of an amine and a carboxylic acid will result in the formation of an amide. The reaction of an acid chloride and an amine will also result in an amide. Lastly, an alcohol can be reacted with an acid chloride to form an amide.

Therefore the correct option is C.

To learn more about chloride

https://brainly.com/question/24218286

#SPJ4

A spherical snowball is melting in such a way that its radius is decreasing at rate of 0.4 cm/min. At what rate is the volume of the snowball decreasing when the radius is 14 cm?

Answers

The rate at which the volume of the snowball is decreasing when the radius is 14 cm is approximately -247.11 cm³/min.

We can use the formula for the volume of a sphere, V = (4/3)πr³, to relate the volume V to the radius r.

Taking the derivative of both sides with respect to time t, we get:

dV/dt = 4πr² (dr/dt)

where dV/dt represents the rate of change of volume with respect to time, and dr/dt represents the rate of change of radius with respect to time.

We are given that dr/dt = -0.4 cm/min (negative because the radius is decreasing). We need to find dV/dt when r = 14 cm.

Plugging in the given values, we get:

dV/dt = 4π(14 cm)² (-0.4 cm/min) ≈ -247.11 cm³/min

Therefore, the volume of the snowball is decreasing at a rate of approximately 247.11 cm³/min.

To know more about volume, refer here:
https://brainly.com/question/1578538#
#SPJ11

What is the standard reduction potential of a standard hydrogen electrode?.

Answers

The standard reduction potential of a standard hydrogen electrode is defined as zero volts.

This is because the standard hydrogen electrode is the reference electrode for measuring the reduction potential of other half-cells in electrochemical reactions. The standard hydrogen electrode is composed of a platinum electrode coated with platinum black, immersed in a solution of 1 M H+ ions, and a gas chamber filled with hydrogen gas at a pressure of 1 atm. When the hydrogen gas is bubbled through the solution, it is reduced to H+ ions and electrons, which are then oxidized at the platinum electrode. The potential difference between the standard hydrogen electrode and another electrode is measured using a voltmeter, and this difference is known as the standard reduction potential. Therefore, the standard reduction potential of a standard hydrogen electrode is zero volts by convention, and it is used as a reference point for measuring the reduction potentials of other electrodes in electrochemical reactions.

To know more about standard reduction potential visit:

https://brainly.com/question/23881200

#SPJ11

An yttrium isotope has 39 protons and 50 neutrons in its nucleus. Which symbol accurately represents this isotope?

Answers

The symbol for this isotope is ^89Y, where the superscript 89 represents the total number of nucleons (protons + neutrons) in the nucleus. The subscript Y stands for yttrium, the element of which this isotope is a part.

What is isotope?

Isotope is an element with a different number of neutrons compared to its standard atomic weight. Isotopes are atoms of the same element with different numbers of neutrons. This leads to different atomic weights, but the same number of protons. The most common isotopes are those of hydrogen and carbon. Isotopes can be stable or unstable, with the unstable ones decaying over time. Isotopes have a variety of uses ranging from energy production to medical imaging. Isotopes are also used in radiometric dating to measure the age of fossils and archaeological artifacts. Isotopes are also used in smoke detectors, as well as in food irradiation to make food safer by killing off harmful bacteria. Isotopes can also be used to determine the composition of soils and rocks.

To learn more about isotope

https://brainly.com/question/14220416

#SPJ4

atoms are rearranged by the breaking and forming of chemical bonds in a atoms are rearranged by the breaking and forming of chemical bonds in a drop zone empty. an element or isotope is converted into a different element or isotope in a an element or isotope is converted into a different element or isotope in a drop zone empty. the energy changes in a nuclear reaction are the energy changes in a nuclear reaction are drop zone empty. the energy changes in a chemical reaction are the energy changes in a chemical reaction are drop zone empty. nuclear reaction. relatively small. chemical reaction. extremely large.

Answers


Atoms can be rearranged by breaking and forming chemical bonds in a drop zone empty, leading to the conversion of an element or isotope into a different one. Similarly, in a nuclear reaction, energy changes occur, but the magnitude of these changes is relatively small compared to those in a chemical reaction.


Chemical reactions involve the breaking and forming of chemical bonds between atoms, resulting in the rearrangement of atoms and the conversion of one substance into another. These reactions are driven by the energy changes that occur during the process, which can either release energy (exothermic) or require energy (endothermic). The energy changes in chemical reactions are typically extremely large, and they can be measured using calorimetry.

In contrast, nuclear reactions involve the splitting (fission) or merging (fusion) of atomic nuclei, resulting in the conversion of one element or isotope into another. The energy changes in nuclear reactions are much smaller than those in chemical reactions, but they are still significant and can be measured using specialized techniques.

In summary, atoms can be rearranged by breaking and forming chemical bonds or through nuclear reactions, leading to the conversion of one substance into another. While energy changes occur in both types of reactions, the magnitude of these changes is much smaller in nuclear reactions compared to chemical reactions.

To know more about nuclear reaction, visit:

https://brainly.com/question/16526663

#SPJ11

According to the graph, which greenhouse gas had the HIGHEST emissions in 2014?

Fluorinated Gases.
Nitrous Oxides
Methane
Carbon Dioxide

Answers

Carbon Dioxide had the highest emissions of greenhouse gases in 2014. The correct answer is 4.

Carbon dioxide (CO2) is the most abundant greenhouse gas in the Earth's atmosphere, and its concentration has been steadily increasing since the beginning of the Industrial Revolution. The burning of fossil fuels for energy production, transportation, and industrial processes is the primary source of anthropogenic CO2 emissions. In 2014, global CO2 emissions from fossil fuel combustion and industrial processes were estimated to be around 32.5 billion metric tons, which is the highest level on record. CO2 is a potent greenhouse gas that can trap heat in the Earth's atmosphere and contribute to global warming and climate change. Therefore, 4 is the correct answer.

To know more about Industrial Revolution, here

brainly.com/question/455063

#SPJ1

--The complete Question is, Which greenhouse gas had the HIGHEST emissions in 2014?

1. Fluorinated Gases.

2. Nitrous Oxides

3.Methane

4.Carbon Dioxide--

HURRY 100 POINT FOR FIRST PERSON TO ANSWER IT FOR SCIENCE TEXT ANSWER

Why do solar and lunar eclipses occur? Practice Your answer should include at least six complete sentences to explain the claim, evidence, and reasoning. Be sure to check your grammar and spelling. Use the sentence starter below to help you begin your answer. My scientific explanation is:

Answers

Answer:A Lunar eclipse occurs when the Sun casts Earth's shadow onto the Moon.

Explanation:

The Earth must be between the Sun and Moon with all three bodies lying on the same plane of orbit. Lunar eclipses must occur during the full moon, and  solar eclipses must occur when the Moon passes between the Sun and Earth, casting the Moon's shadow on Earth

Determine the power supplied by the pump if the flow is to be 0.025 m3/s and the pressure drop over this length is 25 kPa. III Revicw Part A Water at a ternperature of 25 C is purnpxed through the 100-mm-diameter commercial steel pipe over a distance of 50D m 1.11 6.9 Use the equation 1.8log 3.7 (Figure 1) Determine the power supplied by the pump if the flow is to be 0.025 m3 /s and the pressure drop over this length is 25 kPa. Express your answer to three significant figures and include the appropriate units. [] W. Value Units Figure 1011 Submit Request Answer Provide Feedback Next >

Answers

The power supplied by the pump can be calculated using the equation:

Power = (Pressure Drop × Flow) / Efficiency.

What is power ?

Power is the ability to influence or control the behavior of people, things, or events. It is the capacity to act or produce an effect. Power can be derived from many sources, such as knowledge, authority, money, and physical strength. It can also be used for both good and bad purposes. Power is a fundamental concept in politics, economics, and social science. It is often used to describe the ability of individuals or groups to make decisions, control resources, and shape the environment. Power can also be used to describe the ability to affect or manipulate people’s behavior and beliefs. Ultimately, power is a complex concept that has different meanings in different contexts.

Therefore, the power supplied by the pump can be calculated as follows: Power = (25 kPa x 0.025 m3/s) / 0.7 = 178 W .Therefore, the power supplied by the pump is 178 W .

To learn more about power

https://brainly.com/question/2248465

#SPJ4

what is the color of a complex ion that absorbs light primarily in the 450 nm range? multiple choice question. orange blue white black

Answers

Blue is the color of a complex ion that absorbs light primarily in the 450 nm range. Option B is correct.

The color of a complex ion depends on the electronic transition involved in absorbing light. A complex ion that absorbs light primarily in the 450 nm range involves a transition from a ligand field to a d-orbital in the metal ion, which typically results in a blue color. A complex ion is a charged species composed of a central metal ion and surrounding ligands.

The color of a complex ion is determined by the electronic transitions that occur within the molecule. When a complex ion absorbs light, it excites electrons from their ground state to higher energy levels, and the color we observe is the complementary color of the light that is absorbed. Option B is correct.

To know more about the Complex ion, here

https://brainly.com/question/13018620

#SPJ4

Calculate the ph m of the buffer when 85 ml of 0.13 m lactic acid is mixed with 95 ml of 0.08 m sodium lactate ka lactic acid

Answers

The pH of the buffer solution is approximately 3.67.

To calculate the pH of the buffer solution, we need to first calculate the concentrations of the acid and its conjugate base after mixing the solutions.

The balanced chemical equation for the dissociation of lactic acid is:

CH3CH(OH)COOH  +  H2O  <-->  CH3CH(OH)COO-  +  H3O+

The acid dissociation constant (Ka) for lactic acid is 1.38 x 10^-4 at 25°C.

Using the Henderson-Hasselbalch equation, we can calculate the pH of the buffer solution:

pH = pKa + log([A-]/[HA])

where [A-] is the concentration of the conjugate base (sodium lactate) and [HA] is the concentration of the acid (lactic acid).

Step 1: Calculate the moles of lactic acid and sodium lactate

Moles of lactic acid = 0.13 mol/L x 0.085 L = 0.01105 mol

Moles of sodium lactate = 0.08 mol/L x 0.095 L = 0.0076 mol

Step 2: Calculate the total volume of the buffer

Total volume = 85 mL + 95 mL = 0.085 L + 0.095 L = 0.18 L

Step 3: Calculate the concentrations of lactic acid and sodium lactate

[HA] = moles of lactic acid / total volume = 0.01105 mol / 0.18 L = 0.0614 M

[A-] = moles of sodium lactate / total volume = 0.0076 mol / 0.18 L = 0.0422 M

Step 4: Calculate the pH of the buffer solution

pKa of lactic acid = -log(Ka) = -log(1.38 x 10^-4) = 3.86

pH = pKa + log([A-]/[HA])

= 3.86 + log(0.0422/0.0614)

= 3.86 - 0.19

= 3.67

Therefore,  by calculating we can say that the pH of the buffer solution is approximately 3.67.

To know more about the buffer solution refer here :

https://brainly.com/question/24262133#

#SPJ11

The hydronium ion concentration in an aqueous solution at 25oC is 6.1 x 10-2M. What is the pH of this solution?
a. 1.21 b. 12.79 c. 8.21 d. 7.90 e. 11.20

Answers

The correct answer to the given question is Option a. 1.21.

The pH of a solution is defined as the negative logarithm of the hydronium ion concentration:

pH = -log[H3O+]

Substituting the given value:

pH = -log(6.1 x 10^-2) = 1.21

Therefore, the pH of this solution is 1.21.

The pH of a solution is a measure of its acidity or basicity, and is defined as the negative logarithm of the hydronium ion concentration in the solution. In this case, the given hydronium ion concentration is 6.1 x 10^-2 M, and using the pH formula of pH = -log[H3O+], we can calculate the pH of the solution. Substituting the value, we get pH = -log(6.1 x 10^-2) = 1.21. This means that the solution is highly acidic, as pH values below 7 are considered acidic. It is important to maintain proper pH levels in different chemical and biological systems, as pH can affect chemical reactions, enzyme activity, and the overall function of biological systems.

To know more about pH please visit:

https://brainly.com/question/15289741

#SPJ11

The volume of a sample of pure HCl gas was 161 mL at 26°C and 139 mmHg. It was completely dissolved in about 60 mL of water and titrated with an NaOH solution; 27.7 mL of the NaOH solution was required to neutralize the HCl. Calculate the molarity of the NaOH solution.

Answers

The volume of the sample of the pure HCl gas is 161 mL at the 26°C and 139 mmHg. The molarity of NaOH solution is 0.012 M.

The ideal gas equation is :

P V = n R T

Where,

The pressure, P = 1839 mmHg = 0.182 atm

Volume = 0.277 L

R is gas constant = 0.0823 L atm/K mol

Temperature = 26 +273.15 = 299 K

The number of moles of HCl, n  = P V / R T

The number of moles of HCl, n = ( 0.182 × 0.277 ) / ( 0.0823 × 299 )

The number of moles of HCl, n = 0.0020 mol

0.0020 mol of NaOH are needed to neutralize 0.0020 mol of HCl

The molarity is expressed as :

Molarity = moles / volume

The molarity = 0.0020 / 0.161

The molarity = 0.012 M

The molarity is 0.012 M.

To learn more about molarity here

https://brainly.com/question/31545539

#SPJ1

Which of the following is most likely the velocity of a molecule in a vacuum?

Answers

Answer:

The answer to your question is 1m/sec.

Explanation:

The velocity of a molecule in a vacuum is 1m/sec.

Under lower and lower pressure, the molecules spread out further and further, until, at ultra-high vacuum (10 -12 mbar), there are only 2.65 x 104 or 26,500 molecules per cubic centimeter. At this density, there is only one molecule roughly every 0.33 mm in space.

I hope this helps and have a wonderful day!

bromobenzene is converted to a compound with the molecular formula c7h7br in the reaction scheme. identify the reagents in each step and the products formed in each step. bromo benzene reacts with reagent 1 to form product 1. product 1 reacts with reagent 2 to form product 2. product 2 reacts with reagent 3 to form product 3, which has a molecular formula of c 7 h 7 b r. identify reagent 1. draw product 1. identify reagent 2. draw product 2. identify reagent 3. draw product 3.

Answers

When a reaction undergoes a transformation, the reagents play a crucial role. The chemical reaction is different for each reagent.

What is Reagent de Grignard?

Reagent Grignard = R-Mg-X.

R stands for an aryl or alkyl group. X addresses halides (I,Br,Cl) . The principal reason for a Grignard reagent is the development of new C−C bond. An addition product is produced when Grignard reagent reacts with carbonyl groups  (like ketone ( {{ - C = O}}−C=O ), Aldehyde ( - C( = O)H}}−C(=O)H ),

Ester ( - C( = O)OR}}−C(=O)OR )) to form an addition product.  

Adding nucleophiles:

the addition of nucleophiles, which have more electrons, and electrophiles, which have fewer electrons. The double bond is reduced to a single bond during this reaction.

Substitution using nucleophiles:

The nucleophile (electron rich) replaces the leaving group by forming a bond with an electrophile (electron deficient).

Therefore, when a reaction undergoes a transformation, the reagents play a crucial role. The chemical reaction is different for each reagent.

Learn more about Nucleophiles :

brainly.com/question/14052597

#SPJ4

based upon the protocol, which two fractions should you pool from column 1 (ni 2 agarose) to apply to column 2 (anion exchanger)?

Answers

The two fractions that would be best to pool together for application to a subsequent column would be fractions 4 and 5.

What is fractions?

Fractions are a way of writing numbers as a ratio of two numbers. They are written in the form of a/b, where a is the numerator and b is the denominator. The numerator represents the number of parts of a whole, and the denominator represents the total number of parts into which the whole is divided. Fractions can represent parts of a whole number, parts of a set, or parts of a measurement.

The two fractions that would be best to pool together for application to a subsequent column would be fractions 4 and 5. This is because fraction 4 has the highest concentration of the desired protein, and fraction 5 has the second highest concentration. Pooling these two fractions together would maximize the amount of protein present in the pooled fraction and minimize any contaminants that may be present in the other fractions.

To learn more about fractions on:

brainly.com/question/29419078

#SPJ4

The complete question is:

Based upon the quantitative data, what two fractions would be the best to pool together for application to a subsequent column (like an ion exchange or gel filtration column)?

two blocks with different temperatures had entropies of 10 j/k and 30 j/k before they were brought in contact. what can you say about the entropy of the combined system after the two came in contact with each other?

Answers

Entropy of the combined system after the two blocks came in contact with each other would increase.

Entropy is a measure of the disorder or randomness in a system. When two objects with different temperatures are brought in contact with each other, heat flows from the hotter object to the colder object until they reach thermal equilibrium, where they are at the same temperature. This transfer of heat leads to an increase in the entropy of the system because the energy is distributed more evenly, resulting in a more disordered or random system.

In this case, the block with the higher initial entropy (30 j/k) will release heat to the block with the lower initial entropy (10 j/k) until they reach the same temperature, resulting in an overall increase in entropy. The final entropy of the combined system will depend on the specific temperatures and heat capacities of the blocks, but it will always be greater than the initial entropy of the system before the two blocks were brought in contact.

To know more about Entropy, visit:

https://brainly.com/question/13999732

#SPJ11

What is the [CH 3CO 2-]/[CH 3CO 2H] ratio necessary to make a buffer solution with a pH of 4.34? K a = 1.8 × 10 -5 for CH 3CO 2H.
2.5:1
0.91:1
1.09:1
0.39:1

Answers

Necessary ratio to make buffer solution will 0.39 : 1  [CH₃CO₂⁻]/[CH₃CO₂H] with pH of 4.34 according to Henderson–Hasselbalch Equation,

Option D is correct .

With respect to Henderson–Hasselbalch Equation,

                                   pH  =  pKa + log [Acetate] / [Acetic Acid]

As,                                       =  pKa + log[CH₃CO₂⁻]/[CH₃CO₂H]

          pKa = -log Ka

          pKa = -log (1.8 × 10⁻⁵)

          pKa =  4.74

So ,  pH  =  4.74 + log[CH₃CO₂⁻]/[CH₃CO₂H]

       4.34  =  4.74 + log [Acetate] / [Acetic Acid]

          4.34 - 4.74  = log[CH₃CO₂⁻]/[CH₃CO₂H]

       -0.40  =  log[CH₃CO₂⁻]/[CH₃CO₂H]

Taking Antilog of both sides,

             [Acetate] / [Acetic Acid]  = 0.39 : 1

 Hence , the required ratio to make buffer solution with pH will be 0.39 : 1  

Henderson-Hasselbalch equation :

The Henderson-Hasselbalch condition gives a connection between the pH of acids (in watery arrangements) and their pKa (corrosive separation steady). The pH of a cushion arrangement can be assessed with the assistance of this situation when the centralization of the corrosive and its form base, or the base and the comparing form corrosive, are known.

What is the significance of the Henderson-Hasselbalch equation?

The Henderson-Hasselbalch condition is useful while deciding the pH of an answer utilizing pKa and known centralizations of form base, salt, and corrosive. If the pH is known, it can also be used to determine concentrations of conjugate base, salt, or acid.

Incomplete question :

What is the [CH₃CO₂⁻]/[CH₃CO₂H] ratio necessary to make a buffer solution with a pH of 4.34? K a = 1.8 × 10⁻⁵ for CH₃CO₂H.

A. 2.5:1

B. 0.91:1

C. 1.09:1

D. 0.39:1

Learn more about Henderson–Hasselbalch Equation :

brainly.com/question/13423434

#SPJ4

Which are methods of reducing exposure to ionizing radiation?.

Answers

There are several methods of reducing exposure to ionizing radiation. One method is to limit the time spent near a radiation source. This means reducing the amount of time spent in the presence of ionizing radiation to minimize exposure.

Another method is to increase the distance from the radiation source. By increasing the distance between oneself and the radiation source, the amount of radiation exposure decreases.

Additionally, shielding oneself with protective barriers such as lead aprons or walls can also reduce exposure to ionizing radiation. Other methods include practicing good hygiene such as washing hands and clothes frequently to avoid contamination by radioactive materials.

Overall, taking steps to reduce exposure to ionizing radiation is crucial in maintaining good health and preventing potential long-term effects.

To know more about ionizing radiation, visit:

https://brainly.com/question/9621276

#SPJ11

Other Questions
To ensure that query results are listed in a desired order, use the ORDER BY clause. T/F How does dale murph murphy end up overboard and in the water?. when we want to measure wage inflation in the labor market, we use the: group of answer choices consumer price index The Unity editor is in what mode when the play controls display in red? For the chemical equations shown below, label each reactant as either acid or base, and each product as either conjugate acid or conjugate base according to the brnsted-lowry definition. if $40,000 is put in a savings account paying interest of 4% compounded annually, what amount will be in the account at the end of 5 years? 1. For each scenario write the letter for what kind of hypothesis test or confidence interval is described.A. One sample z for one mean B. One sample t for one mean C. Two-sample t for dependent means D. Two sample t for independent means E. One sample z for one proportion F. Two sample z for two proportions G. None of the abovea philosophy major wants to estimate the proportion of people who know what a philosophy major does with 95% confidence. he randomly samples 100 people and exactly half know what he does. If sin (alpha) = 24/25 where 0 < alpha < pi/2 and cos (beta) = 20/29 where 3 pi/2 < beta < 2 pi, find the exact values of the following. Sin (alpha + beta) cos (alpha - beta) tan (alpha - beta) utilitarians believe in no moral rules whatsoever. breaking conventional moral rules whenever it's in one's self-interest. a handful of absolute moral rules. only one absolute moral rule: the principle of utility. T/F? What is the value of [H+] of a solution when pH = pOH? (A) 1 x 10-1. (B) 3.5 x 10-7. (C) 7. (D) 1 x 10-7. (E) 1 x 10-14. Why does the catholic church cover statues during lent. the force of gravitational attraction on a mass a distance from the center of the earth radius of the earth) is unix operating systems is often used by home and office users while windows is often used by system administratorsT/F if the initial concentration of nh3 is 0.350 m and the concentration at equilibrium is 0.325 m, what is in the study examining the effect of beetles on goldenrod abundance, which of the following best describes the outcome in the presence of insecticide? market-oriented environmental tools for firms to take the social costs of pollution into account and in reacting to these incentives.T/F zero-coupon bonds: multiple choice offer a return in the form of a deep discount off the face value. result in zero interest revenue for the investor. result in zero interest expense for the issuer. are reported as shareholders' equity by the issuer. What is the Authentication Mechanisms compatible with Local, Active Directory, and LDAP identity stores: three bears manufacturing produces an auto-quartz watch movement called om362. three bears expects to sell 10,000 units of om362 and to have an ending finished inventory of 7,000 units. currently, it has a beginning finished inventory of 1,200 units. each unit of om362 requires two labor operations, one labor hour of assembling and one labor hour of polishing. the direct labor rate for assembling is $13 per assembling hour, and the direct labor rate for polishing is $16.50 per polishing hour. the expected cost of direct labor for om362 is: A deuterium atom is a hydrogen atom with a neutron added to its nucleus.Approximate the binding energy of this nucleus, given that the mass of the deuterium atom is 2.014102 u and the masses of a hydrogen atom and a neutron are 1.007825 u and 1.008665 u, respectively.A)2 ke VB)2 Me VC)2 Ge VD)2 e V