What is the name for the process of determining the concentration of a solution by slowly adding a known solution to it using a buret?

Answers

Answer 1

Titration is the process of measuring a solution's concentration by gradually adding a known solution to it with a buret.

In titrations and other analytical operations, precise liquid volumes are delivered using a buret, a piece of laboratory equipment. The liquid flow can be precisely controlled using the stopcock at the bottom of the long, graded tube. Accurate measurement of the volume of liquid being added to the solution is made possible by the graduations on the buret. Burets are frequently constructed from premium borosilicate glass to withstand chemical attack and guarantee precise measurements. They come in various sizes, usually between 10 and 100 mL, and can be used with a variety of titrants, such as acids, bases, and other solutions. Burets are frequently employed in chemistry and biology labs and are a crucial instrument in quantitative chemical research.

Learn more about buret here:

https://brainly.com/question/10320619

#SPJ4


Related Questions

Which units express specific heat capacity? J/(gi°C), J/(giK), cal/(gi°C), cal/(giK)

Answers

The units that express specific heat capacity are J/(g°C), J/(gK), cal/(g°C), and cal/(gK). The J stands for joules, which is the SI unit of energy, g stands for gram, which is the SI unit of mass, °C stands for degrees Celsius, and K stands for Kelvin.

The cal stands for calorie, which is a non-SI unit of energy. Specific heat capacity is the amount of energy required to increase the temperature of a unit mass of a substance by one degree. It is usually expressed in joules per gram degree Celsius (J/g°C) or calories per gram degree Celsius (cal/g°C). The specific heat capacity of a substance is related to its molecular structure and the intermolecular forces that exist between its molecules. Substances that have strong intermolecular forces, such as those composed of molecules with multiple polar bonds, typically have higher specific heat capacities than substances with weak intermolecular forces, such as those composed of molecules with few or no polar bonds.

To know more about intermolecular forces please refer:

https://brainly.com/question/9007693

#SPJ4

(the question is in the picture!) - please walk me trough the steps on how to get the answers w the answer please and thank you.

Answers

The number of times a mole of Chromebooks will encircle the moon is  1.59 x 10¹⁶ times.

What is the number of times a mole of Chromebook will encircle the moon?

The number of times a mole of Chromebook will encircle the earth is determined by the length of a Chromebook.

The length of a standard-size school Chromebook is 11.6 inches.

One mole of Chromebook is 11.6 inches long or 0.2946 meters.

Avogadro's number is 6.022 x 10^23.

A mole of Chromebook will have a length =   0.2946 *  6.022 x 10^23.

So, the total length of a mole of Chromebook lined up end to end = 1.75 x 10^24 meters

The circumference of the moon is approximately 10,917 kilometers, which is equal to 10,917,000 meters.

The number of times a mole of Chromebooks will encircle the moon = 1.75 x 10^24/ 10,917,000

The number of times a mole of Chromebooks will encircle the moon =  1.59 x 10¹⁶ times.

Learn more about a mole at: brainly.com/question/29367909

#SPJ1

50 g of ice at -10 0c is dropped into 100 g of water at 250c in an insulating cup whose mass is negligible. only fraction of ice melts. (a) what is the final equilibrium temperature? (b) what % of ice melts? (57%) (hint: how much heat is available just to melt the ice?)

Answers

The final equilibrium temperature is approximately 247.7°C and the percentage of ice that melts is 50%.

The amount of heat transferred is given by the equation:

[tex]Q = m * c * \triangle T[/tex]

First, we need to calculate the amount of heat needed to melt the ice. The heat required to melt ice is given by the equation:

[tex]Q = m * L[/tex]

where L is the latent heat of fusion of ice, which is 334 J/g. Therefore, the heat required to melt 50 g of ice is:

[tex]Q = 50 g * 334 J/g = 16700 J[/tex]

the heat lost by the water is equal to the heat gained by the ice:

[tex]Q_{water} = -Q_{ice[/tex]

[tex]T_f = (Q_{ice}/m_{ice}c_{ice} + Q_{water}/m_{water}c_{water}) + T_i[/tex]

Plugging in the values, we get:

[tex]T_f = (16700 J / 50 g * 2.1 J/gC + 100 g * 4.2 J/gC * (25C - T_i)) + T_i[/tex]

Simplifying this equation, we get:

[tex]T_f[/tex] = (835°C/g + 4200 J/°C + 105000 J/g) / (100 g * 4.2 J/g°C)

[tex]T_f[/tex]= (104035°C/g) / (420 J/°C)

[tex]T_f[/tex]= 247.7°C

Therefore, the final equilibrium temperature is approximately 247.7°C.

To calculate the percentage of ice that melts, we can use the equation:

% ice melted = (mass of ice melted / initial mass of ice) * 100%

mass of ice melted = [tex]Q_{ice} / L[/tex]

mass of ice melted = 16700 J / 334 J/g

mass of ice melted = 50 g

Therefore, the percentage of ice that melts is:

% ice melted = (50 g / 100 g) * 100%

% ice melted = 50%

Thus, the percentage of ice that melts is 50%.

Learn more about latent heat :

https://brainly.com/question/28044951

#SPJ4

In order to combat the cold here on campus, you may have seen OSU facilities use a
brine solution to de-ice the roads and sidewalks. Brine, a concentrated salt solution,
better prevents and eliminates ice from the roads, but can be more costly to store and
disburse along the roadways.
Why is brine a more effective de-ice solution than solid ice melt products? Select all
that apply
Brine is NOT more effective than traditional ice melt products. Since brine is already a solution, the Van't Hoff Factor is higher than solid salt, making the freezing point depression greater. Brine is a higher concentration than solid salts, making the freezing point depression greater. Freezing point depression requires a solution to occur. Brine starts as a solution, where solid salt must form a solution first. The brine solution can more evenly coat the surface of the road, making the ice prevention more widespread.

Answers

The brine a more effective de-ice solution than solid ice melt products is the correct option is : Since brine is already a solution, the Van't Hoff Factor is higher than solid salt, making the freezing point depression greater.

The Brine, is the concentrated salt solution, that is better to prevents and to eliminates the ice from the roads, but it can be more costly to store it. Since the brine is already the solution, the Van't Hoff Factor will be higher than the solid salt, the making is the freezing point depression is greater.

Freezing point depression requires a solution to occur. Brine starts as a solution, where solid salt must form a solution first.

To learn more about brine here

https://brainly.com/question/1493673

#SPJ4

what happens when you add a nonvolatile solute to a liquid?

Answers

When a nonvolatile solute is added to a liquid, the concentration of the solute increases, which leads to a decrease in the vapor pressure of the solvent.

This is due to the fact that the solute particles occupy some of the space that would otherwise be filled by the solvent molecules. Since the solvent molecules have fewer spaces to escape into, the number of solvent molecules that escape into the air above the solution decreases, and therefore, the vapor pressure of the solvent decreases.

This decrease in vapor pressure is proportional to the concentration of the solute, and it is the basis for the phenomenon of vapor pressure lowering. This effect is important in many chemical and physical processes, such as boiling and evaporating, because it affects the temperature at which the solvent will boil.

To learn more about Nonvolatile solute :

https://brainly.com/question/29392465

#SPJ4

Consider the elements, listed, found in the human body.
Which two are major components, making up at least 3% each of the human body?
- magnesium
- nitrogen
- oxygen
- selenium
- cobalt

Answers

The two major components, making up at least 3% each of the human body are Magnesium and Nitrogen.

Only six elements make up nearly all of the human body: oxygen, hydrogen, nitrogen, carbon, calcium, and phosphorus. The remaining mass is composed of sulfur, potassium, sodium, chlorine, and magnesium, which together make up around 0.85% of the total mass. These 11 components are all necessary components.

An adult's body has about 25 g of magnesium, with the majority of that amount found in soft tissues and 50–60% in the bones. Blood serum contains less than 1% of the total amount of magnesium, and these levels are closely monitored.

One of the primary elements in the body, nitrogen is necessary for the formation of various nitrogenous molecules, including hormones, neurotransmitters, and antioxidant defense components.

To know about elements

https://brainly.com/question/12009107

#SPJ4

list Two examples of seeds that are dispersal by water​

Answers

Answer:

okay

Explanation:

Coconut, palm, mangroves, water lily, water mint, are a few examples of plants whose seed are dispersed by the water.

Suppose you have a holiday celebration and over the evening six logs are burned in a fireplace. All thats left is ashes, but you know there are just as many atoms as there were before. how do you know that

Answers

The ashes contain chemicals which have alkaline nature and the range of pH is from 10 to 12. Ashes are made up of atoms of different elements.

What is ashes?

Ashes are defined as something which is left after burning or destroying some substances by fire. It is a greyish-white to black powder residue left when something is burned.

In the branch of analytical chemistry ashes are generally used to identify the mineral and metal content of the chemical samples. Ash is the non-liquid residue.

Ashes contain many atoms of the elements like carbon, calcium, magnesium, potassium, aluminium, phosphorous, etc.

Thus ashes are not remnants, it contains many atoms.

To know more about ash, visit;

https://brainly.com/question/9111555

#SPJ1

20 cm³ of carbon monoxide are reacted with 10 cm³ of oxygen. The equation for the reaction is
shown
2CO (g) + O₂(g) → 2CO₂ (g)
What volume of carbon dioxide is produced?

Answers

Answer: 20.16cm³ of CO₂ produced

Explanation: the equation for the reaction between carbon monoxide (CO) and oxygen (O2) is:

2CO (g) + O₂ (g) → 2CO₂ (g)

Given that 20 cm³ of carbon monoxide is reacted with 10 cm³ of oxygen. From the equation,

we can see that two molecules of CO react with one molecule of O₂to produce two molecules of CO₂

Since we have 20 cm³ of CO and 10 cm³ of O₂, we can calculate the number of moles of CO and O₂ as follows:

CO: 20 cm³ x (1 mole / 22.4 cm³) = 0.89 moles

O₂: 10 cm³ x (1 mole / 22.4 cm³) = 0.45 moles

Since two molecules of CO react with one molecule of O₂, the number of moles of O₂ is half the number of moles of CO. Since we have 0.45 moles of O₂, we can calculate the number of moles of CO₂ produced as follows:

0.45 moles x 2 = 0.9 moles

Finally, to find the volume of CO₂ produced, we can multiply the number of moles of CO₂ by the volume occupied by one mole of CO₂:

0.9 moles x 22.4 cm³/mole = 20.16 cm³

Read more about stoichiometry and mole concept:

https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Beginning_Chemistry_(Ball)/05%3A_Stoichiometry_and_the_Mole#:~:text=5.2%3A%20Stoichiometry,mass%20in%20atomic%20mass%20units.

Calculate the volume of oxygen that will be spent on burning 300 liters of ethane containing 5.8% non-combustible impurities

Answers

Answer:

To calculate the volume of oxygen that will be required to burn 300 liters of ethane containing 5.8% non-combustible impurities, we need to determine the amount of pure ethane present.

Since the ethane contains 5.8% non-combustible impurities, 100 - 5.8 = 94.2% of the 300 liters of ethane is pure and can be burned.

The amount of pure ethane is 94.2% * 300 liters = 282.6 liters.

The stoichiometric equation for the complete combustion of ethane is:

C2H6 + 7O2 -> 4H2O + 6CO2

This equation tells us that for every molecule of ethane that is burned, 7 molecules of oxygen are required.

The volume of oxygen required for burning 282.6 liters of ethane is 282.6 liters * 7 = 1989.2 liters.

So, the volume of oxygen that will be required to burn 300 liters of ethane containing 5.8% non-combustible impurities is 1989.2 liters.

Assuming that the non-combustible impurities have no effect on the combustion of ethane, we can calculate the volume of oxygen required to burn 300 liters of ethane as follows:

Write the balanced chemical equation for the combustion of ethane:

C2H6 + 3.5 O2 -> 2 CO2 + 3 H2O

Determine the stoichiometry of the reaction, which tells us the molar ratio of ethane to oxygen required for complete combustion. From the balanced equation, we see that 1 mole of ethane reacts with 3.5 moles of oxygen.

Convert the volume of ethane from liters to moles, using the ideal gas law:

PV = nRT

where P is the pressure of the gas, V is the volume of the gas, n is the number of moles of gas, R is the gas constant, and T is the temperature of the gas. Assuming standard temperature and pressure (STP), which is 1 atm and 0°C, we have:

n = PV/RT = (1 atm * 300 L)/(0.08206 Latm/molK * 273 K) = 12.5 moles of ethane

Calculate the amount of oxygen required for combustion, using the stoichiometry of the reaction:

3.5 moles of O2 are required for 1 mole of ethane, so for 12.5 moles of ethane, we need:

12.5 moles of ethane * 3.5 moles of O2/mole of ethane = 43.75 moles of O2

Convert the moles of oxygen to volume, again using the ideal gas law:

V = nRT/P = (43.75 mol * 0.08206 Latm/molK * 273 K)/1 atm = 994.8 L of O2

Therefore, approximately 994.8 liters of oxygen will be spent on burning 300 liters of ethane containing 5.8% non-combustible impurities.

after drinking multiple energy drinks in one sitting, your stomach begins to produce excess acid to compensate. this lowers your stomach ph from 2.0 to 1.8. aspirin has a pka of 3.0 and is only absorbed in its protonated form. what percent of aspirin will be absorbed given a stomach ph of 1.8?

Answers

Lowers your stomach ph from 2.0 to 1.8. aspirin only absorbs in its protonated state and has a pka of 3.0,very small percentage of the aspirin will be absorbed  given a stomach ph of 1.8.

The first step is to determine the ratio of protonated to deprotonated aspirin in the acidic environment of the stomach. This can be done using the Henderson-Hasselbalch equation, which relates the pH, pKa, and the ratio of protonated to deprotonated forms of a weak acid:

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

[HA]/[A-] = 10^(pH - pKa) = 10^(1.8 - 3.0) = 0.014

Therefore, only a very small percentage of the aspirin will be absorbed in its protonated form, and the majority will remain in the deprotonated form and be excreted from the body. This may decrease the effectiveness of the aspirin as a pain reliever or anti-inflammatory agent.

Learn more about pH here:

https://brainly.com/question/26856926

#SPJ4

according to the procedure for experiment 4c, which compound will be isolated from the aqueous acidic solution that results from mixing 3 m hcl with the ether solution of the organic reactants?

Answers

The  compound will be isolated from the aqueous acidic solution that results from mixing 3 m HCl with the ether solution of the organic reactants is ethyl-4-aminobenzoate.

The insulation of organic composites is of particular interest to the oil painting, medicinal, ornamental, and alcohol product diligence. Achieving a good separation requires a conscious selection of the fashion to be used, depending on the physical parcels of the organic emulsion.

The compound that shows basic nature can be isolated in aqueous medium by mixing HCl solution.

Among the given (a) ethyl-4-aminobenzoate has a basic amino group which can react with HCl to form soluble salt that enters into aqueous medium.

So (a)  Ethyl 4-aminibenzoate.

Learn more about Isolated compound:

https://brainly.com/question/29361978

#SPJ4

Complete question:

According to the procedure for experiment 4C, which compound will be isolated trom the aqueous acidic solution that results from mixing 3 M HC with the ether solution of the arganic reactants?

A Ethyl 4-aminibenzoate

B 9 fluorenone

C benzoic acid

D the hydrochloride salt of benzoic acid

why can lactose intolerant individuals digest sucrose without any problems?

Answers

Lactose intolerant individuals digest sucrose without any problems because it produces digestive enzymes from sucrose.

Generally, lactose-intolerant individuals only lack the lactase enzyme but may still produce the enzyme for digesting sucrose. For example, a milk allergy is the result of an immune reaction to one or more of the components of milk, such as the protein casein.

Lactose intolerance in our body when body can't break down or digest lactose. Lactose is a type of sugar that is found in milk and milk products. Basically, lactose intolerance happens when your small intestine does not make enough of a digestive enzyme called lactase. Lactase helps in breaking down the lactose in food so our body can absorb it.

Learn more about lactose from the link given below.

https://brainly.com/question/23076188

#SPJ4

solid copper deposits on a piece of aluminum foil when the foil is placed in a blue copper nitrate solution. the blue color of the solution fades.?trackid

Answers

The observed phenomena is the result of a chemical interaction between aluminium and copper nitrate. The following happens when aluminium is added to a copper nitrate solution: 2Al + 3Cu(NO3)2 -> 3Cu + 2Al(NO3) (NO3) 3.

The inorganic substance copper nitrate solution has the vivid blue chemical formula Cu(NO3)2. It dissolves easily in water and easily separates into copper (Cu2+) and nitrate (NO3-) ions in solution. Copper nitrate solution is frequently employed in industrial processes like electroplating and as a catalyst in organic synthesis as well as laboratory studies. Moreover, it is employed in the manufacturing of a number of copper-based products, including copper oxide, copper hydroxide, and copper carbonate. While highly reactive, copper nitrate solution can be hazardous if handled improperly, especially when it comes into touch with combustible materials as this could result in the production of explosive compounds. As a result, it needs to be handled carefully and in a controlled environment.

Learn more about copper nitrate solution here:

https://brainly.com/question/15088874

#SPJ4

How does the acidity of a solution change with increasing concentration of hydrogen ions (H+)?

Answers

Answer: If you add acid to a solution the concentration of hydrogen ions (acidity) increases and the pH decreases.

Explanation:

Answer:

The acidity of a solution increases with increasing concentration of hydrogen ions (H+). The concentration of H+ in a solution determines the pH of the solution, with lower pH values indicating a more acidic solution.

Explanation:

Which of the following conditions indicate an acidic solution at 25 °C? Select all that apply.
pOH = 9.66
pH = 4.25
[H+] > 1.0 x 10-7 M
[H+] > [OH-]
[OH-] > [H+]

Answers

Answer:

The conditions that indicate an acidic solution at 25 °C are:

pH = 4.25

[H+] > 1.0 x 10^-7 M

[H+] > [OH-]

Explanation:

What type of bond holds the atmos in a molecule of methane?

Answers

Answer:

Covalent bond

Explanation:

A covalent bond is a type of chemical bond where two or more atoms share electrons in order to form a bond between them. This bond results from the sharing of electrons in order to attain stability and full valence electron shells for each of the atoms involved. Covalent bonds are typically formed between non-metal elements and are known for their strength and stability.

Answer:

Covalent bond

Explanation:

A covalent bond is a type of chemical bond where two atoms share a pair of electrons in order to form a chemical bond. This bond is formed when the electron pair is shared equally between the two atoms, resulting in a stable and strong bond. Covalent bonds are typically found in compounds composed of non-metallic elements, such as oxygen, nitrogen, and carbon. These bonds are important in the formation of molecules and play a key role in biological processes.

Which water features are often associated with condensation?
Frozen lakes
The Ocean
Clouds and Dew
Water vapor rising from plants.

Answers

The water features are often associated with the condensation is the correct option are The Ocean and the Clouds and Dew.

The Condensation is the process where the water vapor will becomes the liquid. The condensation is the reverse of the evaporation, in which the liquid water becomes the water vapor. The Condensation is occurs one of the two ways: the first way is the air is cooled to the dew point and  it will becomes so saturated with the water vapor  and it cannot be hold  more of the water.

Thus, The Ocean and the Clouds and Dew is the feature of water that is connected with the condensation.

To learn more about condensation here

https://brainly.com/question/868510

#SPJ4

what is total change in entropy equal to?

Answers

The total change in entropy is equal to the sum of heat transfer (in Joules) divided by the absolute temperature (in Kelvin) of the system. In equation form, the total change in entropy (ΔS) is equal to the sum of heat transfer (Q) divided by the absolute temperature (T):  ΔS = Q/T.

Entropy is the measure of randomness in a macroscopic system. It is equal with the ratio of heat absorbed in Joules (Q) and the temperature at which the heat is absorbed in Kelvin (T). If one wants the entropy to decrease, they must transfer the energy from outside the system.

Learn more about entropy at https://brainly.com/question/6364271

#SPJ11

Determine how many moles of copper (Cu) would be produced when 0.33 mole of copper (II) phosphide (Cu3P2) decomposes.

Answers

0.99 moles of copper (Cu) would be made when 0.33 mole of copper (II) phosphide (Cu3P2) deteriorates.

How is copper (II) phosphide (Cu3P2) made?

Copper (II) phosphide (Cu3P2) is a compound that can be made through a reaction between copper and phosphorus under controlled conditions. It can also be made by the reaction between copper sulfate and sodium hypophosphite or by reducing copper (II) phosphate with carbon at high temperatures.

What are the uses of copper (II) phosphide?

Copper (II) phosphide (Cu3P2) has several uses. It is used as a rodenticide to control rodents, as a catalyst, as a lubricant, as an alloying agent, and as a pigment in some ceramic glazes.

The decomposition of copper (II) phosphide (Cu3P2) can be represented by the following chemical equation Cu3P2 → 3Cu + 2P.

The number of moles of copper produced when 0.33 mole of copper (II) phosphide decomposes will be:

0.33 moles Cu3P2 / 1 x 3 moles Cu / 1 mole Cu3P2 = 0.99 moles Cu

So, 0.99 moles of copper (Cu) would be made when 0.33 mole of copper (II) phosphide (Cu3P2) deteriorates.

To know more about the moles, visit here:

https://brainly.com/question/14357742

#SPJ1

for the following reaction, 27.8 grams of calcium hydroxide are allowed to react with 22.7 grams of hydrochloric acid. what is the maximum amount of calcium chloride that can be formed? mass

Answers

The limiting reactant is calcium hydroxide. The maximum amount of calcium chloride that can be formed is 44.6 grams.

The balanced chemical equation for the reaction between calcium hydroxide and hydrochloric acid is:

Ca(OH)2 + 2HCl → CaCl2 + 2H2O

To determine the maximum amount of calcium chloride that can be formed, we need to identify the limiting reactant. The limiting reactant is the reactant that is completely consumed in the reaction, thus limiting the amount of product that can be formed.

We can determine the limiting reactant by calculating the amount of product that can be formed from each reactant and comparing the results.

First, let's calculate the amount of calcium chloride that can be formed from 27.8 grams of calcium hydroxide. We'll use the molar mass of calcium hydroxide to convert grams to moles, and then use the mole ratio between calcium hydroxide and calcium chloride to calculate the amount of calcium chloride that can be formed:

27.8 g Ca(OH)2 × (1 mol Ca(OH)2 / 74.093 g) × (1 mol CaCl2 / 1 mol Ca(OH)2) × (110.98 g CaCl2 / 1 mol CaCl2)

= 44.6 g CaCl2

Next, let's calculate the amount of calcium chloride that can be formed from 22.7 grams of hydrochloric acid. We'll use the molar mass of hydrochloric acid to convert grams to moles, and then use the mole ratio between hydrochloric acid and calcium chloride to calculate the amount of calcium chloride that can be formed:

22.7 g HCl × (1 mol HCl / 36.46 g) × (1 mol CaCl2 / 2 mol HCl) × (110.98 g CaCl2 / 1 mol CaCl2)

= 77.5 g CaCl2

From the calculations above, we can see that the amount of calcium chloride that can be formed from 27.8 grams of calcium hydroxide is 44.6 g, while the amount that can be formed from 22.7 grams of hydrochloric acid is 77.5 g. Therefore, the limiting reactant is calcium hydroxide.

The maximum amount of calcium chloride that can be formed is 44.6 grams.

Learn more about limiting reactant here:

https://brainly.com/question/14225536

#SPJ4

a sample of trifluoroacetic acid, c2hf3o2, contains 88.9 88.9 g of oxygen. calculate the mass of the trifluoroacetic acid sample.

Answers

a sample of trifluoroacetic acid, c2hf3o2, contains 88.9 88.9 g of oxygen, the mass of the trifluoroacetic acid sample is: 316.484 grams

What is molar mass?

The mass in grams of one mole of a chemical is its molar mass. A mole is the measurement of the number of things, such as atoms, molecules, and ions, that are present in a material. It provides you with the amount of grams per mole of a substance, to put it another way. The molar mass of a material is a bulk attribute rather than a molecular one. The fundamental units of matter are called atoms, and by joining atoms together, molecules are created. Chemists use the term "mole" because atoms, molecules, and other particles are all very tiny and require a large amount to even weigh them.

As we know,

1 mole of C₂HF₃O₂ contains 2 moles of oxygen

molar mass of C₂HF₃O₂ = 114.0 gm

atomic mass of 2 Oxygen = 32 gm

(114 / 32) = 3.56

grams of C₂HF₃O₂ = 88.9 x 3.56 = 316.484 grams

To know more about molar mass refer to:

https://brainly.com/question/837939

#SPJ1

Which quantity describes how spread out a set of data is?
A. Percent error
B. Line of best fit
C. Standard deviation
D. Mean

Answers

Standard deviation is a quantity which describes how spread out a set of data is.

What is standard deviation?

A standard deviation (or σ) is a measure of how dispersed the data is in relation to the mean. Low standard deviation means data are clustered around the mean, and high standard deviation indicates data are more spread out.

A standard deviation close to zero indicates that data points are close to the mean, whereas a high or low standard deviation indicates data points are respectively above or below the mean. Standard deviation is a statistic that measures the dispersion of a dataset relative to its mean and is calculated as the square root of the variance.

Learn more about standard deviation,here:

https://brainly.com/question/16555520

#SPJ1

which formal element contributes most to the viewer’s awareness of the passage of time?

Answers

In most cases, the formal element that contributes most to the viewer's awareness of the passage of time is the use of duration.

This can be achieved through various means, such as the duration of shots or scenes, the pacing of events, or the progression of the plot. For example, in a film or video, longer shots or scenes can create a sense of leisurely passing time, while quicker cuts or montages can convey a sense of accelerated time. In a musical composition, changes in tempo and rhythm can also contribute to the perception of time passing.Other formal elements, such as lighting and sound design, can also play a role in shaping the viewer's perception of time, but the most direct and significant influence is typically the use of duration.

Learn more about film here:

https://brainly.com/question/14824318

#SPJ4

Classify each of the following substance as acidic, basic, or neutral
- orange juice; (pH = 3.5)?
- drain cleaner; (pH = 13)?

Answers

Orange juice has a pH of 3.5,Drain cleaner has a pH of 13.The pH scale is a measure of the acidity or basicity (alkalinity) of a solution, ranging from 0 (most acidic) to 14 (most basic), with 7 being neutral.

Based on the given pH values, we can classify each substance as acidic, basic, or neutral:

Orange juice has a pH of 3.5, which is below 7, indicating that it is acidic. Orange juice is acidic due to the presence of citric acid, which is a weak organic acid found naturally in citrus fruits.

Drain cleaner has a pH of 13, which is above 7, indicating that it is basic (alkaline). Drain cleaners are typically basic due to the presence of strong alkaline compounds such as sodium hydroxide (NaOH) or potassium hydroxide (KOH), which are used to dissolve clogs in drains and pipes.

In summary, based on their pH values, orange juice is acidic and drain cleaner is basic. It is important to note that both acids and bases can be harmful if not used or handled properly, and caution should always be exercised when working with them.

Find out more about pH scale

brainly.com/question/13934432

#SPJ4

a chemist plans to use 435.0 grams of ammonium nitrate in a reaction. how many moles of the compound is this?

Answers

435.0 grams of ammonium nitrate is equivalent to 5.436 moles of the compound.To determine how many moles of ammonium nitrate are in 435.0 grams of the compound, we need to first determine the molar mass of ammonium nitrate and then use that value to convert grams to moles.

The molecular formula of ammonium nitrate is NH4NO3, which consists of one nitrogen atom, four hydrogen atoms, one oxygen atom, and three nitrogen atoms. To calculate the molar mass of NH4NO3, we can add up the atomic masses of each of these elements, taking into account the number of atoms of each element in the molecule.

The atomic masses are: nitrogen (N) = 14.01 g/mol, hydrogen (H) = 1.008 g/mol, and oxygen (O) = 16.00 g/mol.

Molar mass of NH4NO3 = (1 x 14.01 g/mol) + (4 x 1.008 g/mol) + (3 x 16.00 g/mol)

Molar mass of NH4NO3 = 80.04 g/mol

To convert 435.0 grams of NH4NO3 to moles, we can use the formula:

moles = mass (in grams) / molar mass

moles of NH4NO3 = 435.0 g / 80.04 g/mol

moles of NH4NO3 = 5.436 mol

Therefore, 435.0 grams of ammonium nitrate is equivalent to 5.436 moles of the compound.

Find out more about ammonium nitrate

brainly.com/question/10197458

#SPJ4

Ammonia is produced from the reaction of nitrogen and hydrogen gases. What volume of hydrogen at STP is required to produce 25 g of ammonia?

Answers

The volume of hydrogen at STP is required to produce 25 g of ammonia is 37.5 g.

The balanced equation for the formation of ammonia is given as follows

N₂ + 3H₂ → 2NH₃

The stoichiometry of H₂ to NH₃ is 3 : 2.

Avagadros law states that "at volume of gas is proportional to number of moles of gas at constant pressure and temperature."

Therefore, the molar ratio is equivalent to volume ratio,

Hence, the volume ratio of H₂ to NH₃ is 3 : 2

It can be concluded that 2 L of NH₃ requires 3 L of H₂.

Then 25.g of NH₃ requires = 3/2 x 25 = 37.5 g of H₂

So, volume of H₂ required is 37.5 g.

Learn more about volume from the link given below.

https://brainly.com/question/27868083

#SPJ4

what volume of a 0.280 m solution of kbr is needed to precipitate 13.0 g of agbr from a solution containing 0.490 mol of agno3 .

Answers

A 0.280M solution of [tex]KBr[/tex] in 16.743 L where 13.0 g of [tex]AgBr[/tex] must be precipitated in order to from an [tex]AgNO3[/tex] solution with 0.490 mol

Given the concentration of [tex]KBr[/tex] = 0.280M

The mass of [tex]AgBr[/tex] = 13g

The number of moles of [tex]AgNO3[/tex] is = 0.490

The volume of [tex]KBr[/tex] required = V

The volume of a 0.280 m solution of [tex]KBr[/tex] needed to precipitate 13.0 g of [tex]AgBr[/tex] from a solution containing 0.490 mol of [tex]AgNO3[/tex] is calculated using the following equation:

[tex]KBr+AgNO3--- > AgBr+KNO3[/tex]

Volume (L) = (Moles * Molar Mass [tex]AgBr[/tex]) / (Molarity [tex]KBr[/tex])

Volume (L) = (0.490 * (107.8682)) / (0.280 mol/L)

Volume (L) = 16.743 L

As a result, 13.0 g of AgBr must be precipitated from a solution containing 0.490 mol of [tex]AgNO3[/tex] using 16.743 L of a 0.280 m solution of [tex]KBr[/tex].

To learn more about AgBr click here https://brainly.com/question/14031729

#SPJ4

In water, a substance that ionizes completely in solution is called a a. weak electrolyte b. nonelectrolyte c. nonconductor d. strong electrolyte

Answers

In water, a substance that is ionizes totally and completely in solution is called strong electrolyte.

Ionization is a process in which a neutral snippet or patch earnings or loses one or further electrons. The performing charged snippet/ patch is called an ion. A appreciatively charged ion is called a cation, while a negatively charged ion is called an anion.

The ionization process is used in a wide variety of outfit, for illustration, spectrometer, radiation remedy, fluorescent lights,etc.

Strong electrolytes are ones that completely ionise or dissociate in their aqueous solution.

These electrolytes have a higher extension of ionisation and a high electrical conductivity.

Learn more about Strong electrolyte:

https://brainly.com/question/2285692

#SPJ4

IS ANYONE GOOD AT CHEMISTRY IF SO PLEASE COMMMENT AND LMK I NEED HELPPP

Answers

Answer:

yes I am good at the subject. That is my course

Other Questions
A map of a highway has a scale of 2 inches = 33 miles. The length of the highway on the map is 6 inches. There are 11 rest stops equally spaced on the highway, including one at each end. You are making a new map with a scale of 1 inch = 30 miles. How far apart are the rest stops on the new map? If 30% of a number is 42 and 70% of the same number is 98, find 40% of that number. help i dont understand this fully I cant find this answer please help me. In a platform marketplace, the authors suggest that lowering prices on one side of the network increases demand ________a. on both sides of the network b. on neither side of the network c. None of these d. on that side of the network e. on the other side of the network The data in the table was produced by a researcher studying thenumber of vegetables people ate for one week. Group A and Group B,each with 20 people, recorded the vegetables that they ate. If a personis chosen at random from those who ate at least 7 vegetables, what isthe probability that the person belonged to Group A? The graph of f(x) = ce^x crosses the y -axis at (0, c) where c is some constant: Where does the graph of g (x) = f(x)- d cross the y -axis? The graph of g (x) = f(x) -d crosses the Y ~axis Car 1 is traveling a 7 m/s and has a mass 3000kg. Car 2 is stopped and has a mass of 8000 kg. If the two cars collide and couple , what will be their final velocity? If all of the diagonals are drawn from a vertex of an n-gon, how many triangles are formed?A) n - 2B) n - 1C) nD) n + 1 21) when caring for a patient with a head injury, which of the following assessment information requires immediate action by the nurse? a. the pulse is 58 (bpm) and is irregular b. the client complains of a severe headache c. the blood pressure increases from 115/60 to 140/80mmhg. d. the client starts slurring their speech Fill in the sentence below with the description that most specificallyapplies to the quadrilateral below.X117The quadrilateral is most specifically abecause 43Select the correct answer.How does Henry address his audience to develop his ideas in paragraph 1? Which of the following statements would be MOST important to include in a summary of the section "Man Of The People And The Arts"? A plane is flying at a speed of 175 miles per hour.The pilot plans on flying at this speed for the next250 miles, plus or minus 25 miles. Findthe minimum and maximum number of hours thplane will travel at that speed. During a sale, a store offered a 35% discount on a tablet computer that originally sold for $340. After the sale, the discounted price of the tablet computer was marked up by 35%. What was the price of the tablet computer after the markup? Round to the nearest cent. Select the correct answer. In which of the scenarios can you reverse the dependent and independent variables while keeping the interpretation of the slope meaningful? A. As the number of cigarettes smoked in a day increases, the risk for lung cancer increases. B. As the age of an infant increases, the height of the infant increases. C. As the number of vehicles in a city increases, the amount of pollution in the city increases. D. As the concentration of salt in water increases, the density of water increases. E. As the number of calls made by a cell phone increases, the cell phone bill amount increases. Do king's body gestures accurately reflect his message ? Which of the following is true about globalization?(i) Globalization refers to the accelerated interdependence of economic and business activities across national boundaries.(ii) Globalization influences the availability and pricing of products and services around the world.(iii) Globalization affects your careers opportunities and the skill you will need to be successful.(iv) Globalization creates opportunities and poses challenges to individuals businesses and countries. what must a prosecutor prove when the law requires mens rea? the market analysis section of a business plan should show that the business owner has knowledge of the market, has conducted research into the market and has ?