Answer: 4Al + 3O2 -> 2Al2O3
Explanation:
What I did was:
The product has 3 oxygens while the reactant has 2. So if you multiply the reactant by 3 and the product by 2 then the amount of oxygens on both sides will be equal (both sides have 6)
Then since there are now 4 Al on the product sides after multiplying by 2 for the oxygen (2 Al2 = 4 Al), there must be 4 Al on the reactants side.
When adding acid to base the phenolphthalein indicator changes Colour from Colourless to pink at the end of titration?
Because it is colorless by nature, phenolphthalein functions differently from litmus paper. In an alkaline solution or base, it also turns pink.
In addition, the substance is colorless in acids but turns pink at pH 8.2 and brilliant purple when exposed to strong bases. The mechanism that results in the compound's color shift is ionization (Phenolphthalein). Additionally, when a molecule loses or gains an electron, ionization takes place, giving the molecule a positive or negative charge.
Additionally, the ionized molecule repels the same charge and attracts the opposite change. Additionally, it has an impact on molecular form. Additionally, the charge affects how it will respond to light.
Normally, the Phenolphthalein solution appears colorless because it allows all hues of light to pass through it. However, as it is exposed to alkaline, it begins to obstruct the blue portion of the light spectrum, turning the light pink. Additionally, more phenolphthalein molecules will transform and result in a deeper color the stronger the alkaline solution.
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a chemist mixes two liquids, a and b, to form a homogeneous mixture. the densities of the liquids are 2.0514 g/ml for a and 2.6678 g/ml for b. when she drops a small object into the mixture, she finds that the object becomes suspended in the liquid; that is, it neither sinks nor floats. if the mixture is made of 41.37 percent a and 58.63 percent b by volume, what is the density of the metal?
If the mixture is made of 41.37 percent a and 58.63 percent by volume, then the density of the object is calculated as 1.9302 g/mL.
What is density?Density is a mass of a unit volume of a material substance. It is commonly expressed in units of grams per cubic centimeter.
Given, vA = 413.7 mL and vB = 586.3 mL
total (A+B) density = mass AB / volume AB
As, mAB = mA + mB
mA = vA * dA = 413.7 mL * 2.0514 g/mL
= 848.664 g A
mB = vB * dB = 586.3 mL * 2.6678 g/mL
= 1564.13 g B
Hence, mAB = 2412.795 g AB
total density = 2412.795 g / 1000 mL = 2.4127 g/mL AB
Use principle of Archimedes' to find the density of a solid suspended in a liquid:
E = dAB * g * Vs
Vs is submerged solid volume; E : fluid weight displaced by the solid
and dAB : mix density ; g : gravity
As, ∑F = 0
E - Wsolid = 0
Hence, E = Wsolid
∴ Wsolid = msolid * g
Now, msolid * g = dAB * g * Vs
msolid = dsolid * Vs
So, msolid = dsolid * Vsolid
Assuming that 80% of solid is submerged in mixture, we have: Vs = 0.8 * Vsolid
Then, dsolid * Vsolid = dAB * 0.8 * Vsolid
dsolid = dAB * o.8
dsolid = 2.4127 g/mL * 0.8
So, dsolid = 1.9302 g/mL
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write a balanced equation for this reaction: oxygen reacts with hydrogen to yield water
Answer:
Perfecto
Explanation:
2H2 + O2 -> 2H2O
Classify each process by its individual effect on the entropy of the universe, S.
Drag the appropriate items to their respective bins: Increases S of the Universe, Does not Affect S of the Universe, Decreases S of the Universe.
a process run infinitesimally slowly at equilibrium and reversed to its original state
a constant composition mixture of solid and liquid water at STP (273.15 K and 1 atm)
motion of a frictionless pendulum
a bag of red marbles and a bag of green marbles dumped together on a table top
ice melting to water above the melting point
sublimation of naphthalene
(mothballs)
Entropy is a measure of disorder, so it follows that as molecular randomness rises, entropy will as well.
What is Entropy?Entropy is a measurable physical characteristic and a scientific concept that is frequently connected to a state of disorder, randomness, or uncertainty. Entropy is the measurement of the amount of thermal energy per unit of temperature in a system that cannot be used for productive work. Entropy is a measure of a system's molecular disorder or randomness because work is produced by ordered molecular motion. Ice melting is the ideal illustration of entropy. The individual molecules are arranged and fixed as ice.
Here,
The processes that have no impact on the universe's entropy are as follows:
1. A process that was run infinitesimally gradually until it reached equilibrium and then reversed.
2. A mixture of solid and liquid water with a constant composition, at standard pressure and temperature.
3. a frictionless pendulum swinging back and forth.
The processes that increase the universe's entropy are as follows:
1. A tabletop covered with a bag of green marbles and a bag of red marbles.
2. Above the melting point, ice melts into water.
3. Slowly converting into oxygen and water is hydrogen peroxide.
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Does not Affect S of the Universe .Part A), B) and C) are included .
What is Entropy?Entropy is a measurable physical characteristic and a scientific concept that is frequently connected to a state of disorder, randomness, or uncertainty. The quantity of temperature energy produced per unit of warmth in an unit that cannot be put to use in a useful way is measured as entropy. Entropy is a measure of a system's molecular disorder or randomness because work is produced by ordered molecular motion. Ice melting is the ideal illustration of entropy. The individual molecules are arranged and fixed as ice.
Does not Affect S of the Universe
a process with a fixed composition of liquid and solid water at STP that is performed insignificantly slowly at harmony and then reverted to its initial condition (273.15 K and 1 atm)
motion of a frictionless pendulum
Increases S of the Universe
a bag of red marbles and a bag of green marbles dumped together on a table top
above the melting point, ice melts to water.
sublimation of naphthalene
Entropy rises when molecular randomness does as well.
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The complete Question :
Classify each process by its individual effect on the entropy of the universe, S.
Drag the appropriate items to their respective bins: Increases S of the Universe, Does not Affect S of the Universe, Decreases S of the Universe.
A) a process run infinitesimally slowly at equilibrium and reversed to its original state
B) a constant composition mixture of solid and liquid water at STP (273.15 K and 1 atm)
C) motion of a frictionless pendulum
D) a bag of red marbles and a bag of green marbles dumped together on a table top
E) ice melting to water above the melting point
F) sublimation of naphthalene
(mothballs)
Tectonic plates are huge pieces of HHEOITERPSL __________________ that slowly move on the HHTNSESEPROAE _
Answer:
Lithosphere, Asthenosphere
Explanation:
I am pretty sure that's right
Answer:plate motion, or tectonic shift
Explanation:
hydrogen (h) atoms have an atomic number of 1. in a nuclear fusion reaction, one atom of hydrogen with a mass number of 2, and one atom of hydrogen with a mass number of 3 are smashed together. they form a new atom and lose one neutron into the environment. what atom is produced and what atomic number and what mass number does it have as a result of this reaction? you should use the periodic table to answer this question.
When deuterium and tritium fuse, the atom produced is helium nucleus, which atomic number 2 and mass number 4.
How much energy does the fusion of deuterium and tritium produce?One deuterium nucleus and one tritium nucleus fuse to produce one helium nucleus, one free neutron, and 17.6 MeV of energy in a process known as deuterium-tritium fusion (also abbreviated as D+T). For fusion devices, it is the type of fusion that is most effective.
What is the reaction known as when the deuterium and tritium nuclei combine?Illustration of the fusion reaction between deuterium (D) and tritium (T), which results in the production of helium nuclei (or alpha particles) and high-energy neutrons. The Sun and other stars are propelled by nuclear fusion processes. Two light nuclei combine to form one heavy nucleus during a fusion process.
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given that the values of the formation constants are large, what can you deduce about the equilibrium concentration of cu(nh3)4 21 versus the equilibrium concentration of cu21?
If the formation constants of a complex are large, it means that the complex is more stable than the individual species and therefore, the equilibrium concentration of the complex will be greater than the equilibrium concentration of the individual species.
In the case of Cu(NH3)4^2+ versus Cu^2+ The large value of the formation constant for Cu(NH3)4^2+ suggests that it is more stable than Cu^2+ and the equilibrium concentration of Cu(NH3)4^2+ will be greater than the equilibrium concentration of Cu^2+.It should be noted that large formation constants also indicate that the complex is more difficult to dissociate, and more energy is required to do so.
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what happens inside an air-filled balloon is squeezed on all sides?responsesthe air molecules remain in the same place.the air molecules remain in the same place.the air molecules move closer together.the air molecules move closer together.the air molecules move farther apart.the air molecules move farther apart.the air molecules move more slowly.the air molecules move more slowly.
The air molecules move closer together. This works on Boyle's law.
A balloon is an instance of Boyle's law in action. The balloon is filled with air, and the pressure of that air thrusts on the rubber, causing the balloon to expand. When one end of the balloon is squeezed, the pressure inside increases, causing the un-squeezed portion of the balloon to expand out. Boyle's Law is a fundamental law of chemistry that describes the behaviour of a gas at a fixed temperature. Robert A. Boyle discovered the law in 1662, which states that at a constant temperature, the volume of a gas is inversely proportional to the pressure exercised by the gas.
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Bacterial fermentation of sugars usually results in results in ___________ end products. end products whereas breakdown of proteins and amino acids the formation of __________ Multiple Choice O acidic........alkaline O acidic.....alcoholic O alkaline.......sulfide O alcohol........acidicO alkaline........acidic
Acidic end products are typically produced when bacteria digest carbohydrates. alkaline is produced as a result of the degradation of proteins and amino acids.
Which 20 necessary amino acids are there?
Histidine, valine, leucine, lysine, homocysteine, phenylalanine, threonine, tryptophan, & valine are the necessary amino acids. Alanine, asparagine, asparagine, glutamic acid, & serine are the non-essential amino acids.
What does a skin amino acid do?
All protein, including the most prevalent protein filaments in the skin, keratins, collagen, and elastin, are made up of amino acids. Skin that is chronically sun-damaged, aged, and neglected exhibits sagging and wrinkles, which are mostly attributed to the degeneration of collagen fibres.
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A solution contains 32 g of KNO3 per 100.0 g of water at 25 C Is the solution unsaturated, saturated, or supersaturated?
At 25 C, a solution has a KNO3 concentration of 32 g per 100.0 g of water. The solution is therefore not saturated.
At 25 C, is KNO3 soluble in water?Explanation: You are well aware that the solubility of potassium nitrate, KNO3, in water varies between 38.0 g at 25 degrees Celsius and 155 g per 100 g at 75 degrees Celsius.
A saturated solution is what?A solution is said to be saturated when it has dissolved all of the solute it can. At a certain temperature, no additional solute can dissolve in a saturated solution. By continuing to dissolve the solute until no more can be done, we can create a saturated solution.
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which of the following statement(s) are false? question 50 options: smaller drops have smaller curvature and require greater vapor pressure to keep water molecules from evaporating away. larger drops have greater curvature and require greater vapor pressure to keep water molecules from evaporating away. as the drop size increases, the required relative humidity (rh) for equilibrium increases. as the drop size decreases, the required relative humidity (rh) for equilibrium decreases. a
The false statement are the drop size decreases, the required relative humidity for equilibrium decreases and the drop size increases, the required relative humidity for equilibrium increases.
What more strongly affects droplet size?Droplet size decreases with both rising fluid temperature and pressure. Droplet size is reduced by both increased viscosity and surface tension. By taking into account these variables, you may adjust the droplet sizes to best meet the demands of each situation.
What is the relative humidity at equilibrium?The relative humidity of the atmosphere at a specific temperature when a material neither absorbs nor loses moisture is known as equilibrium relative humidity (ERH). Hygroscopic materials enter the ERH by collecting or releasing moisture at a specific relative humidity of the surrounding air.
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Write a sentence that describes this chemical reaction:
Na(s) + H2O(l) ⇒ NaOH(aq) + H2(g)
The sentence that describes this chemical reaction: is that:
The chemical reaction describes the process where solid sodium (Na) reacts with liquid water (H₂O) to produce aqueous sodium hydroxide (NaOH) and hydrogen gas (H₂).What is the chemical reaction about?This chemical reaction is an example of a neutralization reaction, where an acid and a base react to form a salt and water. In this case, the acid is hydrogen gas (H₂) and the base is sodium hydroxide (NaOH). The reaction can be written as:
Na(s) + H₂O(l) --> NaOH(aq) + H₂(g)
where Na(s) represents solid sodium, H₂O(l) represents liquid water, NaOH(aq) represents aqueous (dissolved in water) sodium hydroxide and H₂(g) represents hydrogen gas.
Sodium (Na) is a metal and a strong base. It reacts with water to produce hydrogen gas and a solution of sodium hydroxide, which is a strong base. When sodium metal is added to water, it reacts by losing an electron and becoming a positively charged ion (Na+). At the same time, water molecules, H₂O, split into hydrogen ions (H+) and hydroxide ions (OH-).
Therefore, It is an exothermic reaction, meaning it releases heat. It can also be dangerous as hydrogen gas is flammable and can cause explosion if it comes in contact with an ignition source.
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A solution contains 45 g of KNO3 per 100.0 g of water at 25 ∘C. Is the solution unsaturated, saturated, or supersaturated?
At 25 °C, a solution has a KNO3 concentration of 45 g per 91.7 g of water. Unsaturated, saturated, or fully saturated is the state of the solution
How can you tell whether a solution is full or not?What distinguishes a saturated solution from an unsaturated one? The previous solution was saturated if extra solution is applied and does not dissolve. The experimental method was unsaturated if the extra solute dissolves.
How much KNO3 can dissolve in 100 water grams at 40 degrees Celsius?100 grams od water and 35 kilograms of KNO3 are dissolved in a solution at 40 degrees Celsius. Answer and justification This indicates that at 80 ° C., the saturated KCl solution will have a KCl content of 50 grams per 100 grams.
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microscale reactions involve reaction mixtures with volumes ?
Microscale reactions involve reaction mixtures with volumes of 5 ml or less than 5 ml.
What exactly is a microscale reaction?Microscale chemistry (also known as tiny-scale chemistry, in German: Chemie am Mikromaßstab) is an analytical approach as well as a teaching method that works with small quantities of chemical compounds. Benefits of Teaching with Microscale Chemistry explains how microscale chemistry allows you to perform more experiments in less time while also being safer, more exact, less expensive, and creating less waste.
A chemical reaction includes the transformation of reactant atoms, ions, and/or molecules into product atoms, ions, and/or molecules at the microscopic level. This necessitates the breaking of certain connections, the formation of others, and the relocation of some nuclei.
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if 4.2 g of methane reacts with excess oxygen gas to form carbon dioxide and water in the following chemical equation, how much water is produced in the reaction?
The mass of water is produced in the reaction of methane with oxygen gas is 9.35 g.
What is chemical reaction of methane reacts with oxygen?In a chemical reaction, reactants undergo a reaction and change into products throughout a chemical process.
CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)
mass of methane is 4.2 g
molar mass is 16.04 g/mol.
The number of moles of methane present is 4.2 g / 16.04 g/mol = 0.26 moles.
From the chemical equation, we can see that for every 1 mole of methane that reacts, 2 moles of water are produced.
if 0.26 moles of methane react, then 2 * 0.26 moles = 0.52 moles of water are produced.
molar mass of water = 18.02 g/mol
moles of water produced, 0.52 moles.
mass of water produced = 18.02 g/mol * 0.52 moles = 9.35 g.
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how many moles of h2o are produced when 1 mole of mg(oh)2 reacts with 1 mole of h2so4?
In the reaction between one molecule of magnesium hydroxide and one mole of sulfuric acid, 1 molecule of magnesium sulfate with 2 moles of water are produced.
What purpose does magnesium hydroxide serve?Magnesium chloride is a relatively brief remedy for occasional constipation in both kids and adults. Magnesium hydroxide is a component of a class of medications known as saline natural remedies. It works by causing the feces to hold onto water.
Does magnesium hydroxide work well to neutralize acids?Heartburn, acid reflux, and gastrointestinal issues are all treated using antacids that combine hypochlorous acid and hydroxides. They can be used to treat patients from peptic ulcer disease, gastritis, peptic ulcer disease, hiatal hernias, or excessive digestive fluids (gastric hyperacidity).
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Select the element(s) that will have one unpaired electron in the p orbital.
A. Ar
B. Mg
C. Al
D. O
E. Cl
The element that will have one unpaired electron in the p orbital will be aluminum (Al).
The electronic configuration of the given element as follows:
The atomic number of argon (Ar) will be 18: 1s22s22p63s23p6
The atomic number of magnesium (Mg) will be 12: 1s22s22p63s2
The atomic number of aluminum (Al) will be 11: 1s22s22p63s23p1
The atomic number of oxygen (O) will be 8: 1s22s22p4
The atomic number of chlorine (Cl) will be 17: 1s22s22p63s23p5
Therefore, aluminum is the only element hat will have one unpaired electron in the p orbital.
Thus be concluded that element Al will have one unpaired electron.
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Suppose one electron in H2 is excited from the MO to the o*1s MO. Would you expect the H atoms to remain bonded to each other, or would the molecule fall apart? a. Fall apart, as the bond order changes from one to zero. b. Remain bonded, as the bond order changes from 1 to 1%. c. Remain bonded, as the bond order remains the same. d. Fall apart, as the bond order changes from 1 to 1%. e. It is not possible to excite an electron from the 01s MO to the o'is MO in Hz.
Remain bonded, as the bond order remains the same. When electrons are excited from the 01s MO to the o'is MO in H2, the bond order remains the same. This means that the molecule does not break apart, and the H atoms remain bonded to each other.
What is electrons?Electrons are particles of matter with a negative electrical charge. They are the smallest and most basic unit of matter and are found in atoms. Electrons are much smaller than protons and neutrons, and they orbit the nucleus of an atom in an electron cloud. Electrons are responsible for chemical bonding between atoms and also for electrical conduction.
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BCD Chemical Distributors has prepared a barrel of hazardous chemicals to be shipped to your employer. Select from the options to determine which items must be in place before it can be shipped. Select all that apply.answer choicesSDSPrice TagWarning LabelShipping Item Sheet
Specified elements including pictograms, signal words and hazard and precautionary statements.
What is necessary for each hazardous chemical on a construction site?Employers are required to keep copies of SDSs for any hazardous substances in their workplaces. If you do not immediately receive an SDS from your provider, you must request one. You must also make sure that SDSs are easily available to employees when they are in their work areas during their shifts.
OSHA has modified the criteria for hazardous chemical labeling under its Hazard Communication Standard (HCS). Pictograms, a signal word, hazard and precautionary remarks, the product identity, and supplier identification are all needed on all labels.
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Rank these systems in order of decreasing entropy.
Rank from highest to lowest entropy. To rank items as equivalent, overlap them.
1 mol of
oxygen gas at
273 K and 40 L
1/2 mol of
xenon gas at
100 K and 20 L
1 mol of
xenon gas at
273 K and 20 L
1/2 mol of
liquid xenon
at 100 K
1 mol of
xenon gas at
273 K and 40 L
1 mol of
carbon tetrachloride gas at
273 K and 40 L
1/2 mol of
xenon gas at
273 K and 20 L
The systems, in order of decreasing entropy from highest to lowest entropy, will be
1 mol of oxygen gas at 273 K and 40 L
1 mol of xenon gas at 273 K and 40 L
1 mol of xenon gas at 273 K and 20 L
1/2 mol of xenon gas at 273 K and 20 L
1/2 mol of liquid xenon at 100 K
1/2 mol of xenon gas at 100 K and 20 L
1 mol of carbon tetrachloride gas at 273 K and 40 L
Entropy is a measure of the disorder or randomness of a system. Generally, a system with a higher temperature, a higher number of moles, or a larger volume will have a higher entropy.
In this case, the system with the highest entropy is the 1 mol of oxygen gas at 273 K and 40 L. The reason is that the temperature is high, the number of moles is high, and the volume is large.
The systems with the lowest entropy are the 1/2 mol of liquid xenon at 100 K and the 1/2 mol of xenon gas at 100 K and 20 L. The reason is that the temperature is low, and the number of moles is low.
The other systems fall in between these extremes, in order of increasing entropy: 1 mol of xenon gas at 273 K and 40 L,1 mol of xenon gas at 273 K and 20 L, 1/2 mol of xenon gas at 273 K and 20 L, and 1 mol of carbon tetrachloride gas at 273 K and 40 L.
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the rate constant for a reaction increases from 10.0 to 100 when the temperature is increased from 300k to 400k what is the activcation energy
A reaction's rate constant rises from 10.0 to 100. when the temperature rises from 300°C to 400°C 45.6 kJ/mol is the activation energy.
The activation energy for the reaction can be calculated using the Arrhenius equation, which relates the rate constant to the activation energy and the temperature. The Arrhenius equation is: k = A * e^(-Ea/RT). Where k is the rate constant, A is the pre-exponential factor, Ea is the activation energy, R is the gas constant, and T is the temperature. By rearranging the equation to solve for Ea, we get: Ea = -RT * ln(k/A)We know that k1 = 10.0 s^-1 at T1 = 300 K, and k2 = 100. s^-1 at T2 = 400 K. We can use these values to calculate the activation energy: Ea = -(8.314 J/mol*K) * (400 K - 300 K) * ln(100/10)=Ea ≈ 45.6 kJ/mol.
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For the reaction represented by the equation Mg + 2HCl → H2 + MgCl2, calculate the percentage yield of magnesium chloride if 100. g of magnesium react with excess hydrochloric acid to yield 330. g of magnesium chloride. (Show your work on a separate sheet of paper and keep it to turn in when you return to school)a. 74.3%
b. 81.6%
c. 84.2%
d. 71.8%
The percentage yield of magnesium chloride is 84.16%.
To calculate the percentage yield of magnesium chloride, you would divide the amount of magnesium chloride produced by the theoretical amount that could have been produced and multiply by 100.
First, we will calculate the theoretical yield of magnesium chloride. The balanced equation for the reaction is:
Mg + 2HCl → H2 + MgCl2
So for every 1 mole of Mg, we get 1 mole of MgCl2
To convert mass to moles we use the molar mass of each substance:
Mg = 24.3 g/mol
MgCl2 = 95.2 g/mol
So 100g of Mg is equal to (100 / 24.3) = 4.1 moles of Mg
and the theoretical yield of MgCl2 is 4.1 moles * 95.2g/mol = 391.32 g.
Now we can calculate the percentage yield by dividing the actual yield (330 g) by the theoretical yield (391.32 g) and multiplying by 100:
(330 / 391.32) * 100 = 84.16%.
So the percentage yield of magnesium chloride is 84.16%.
This means that 84.16% of the theoretical yield of magnesium chloride was actually produced in the reaction.
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in an experiment, the concentration of a is monitored every 20 seconds as the reaction proceeds. explain how you can use the data from the experiment to determine the rate constant, k, of the reaction mentioned above.
The rate constant, k, of a reaction can be calculated from the data collected from an experiment by fitting the data to the integrated rate law equation for a given order reaction.
What is reaction?Reaction is a response to a stimulus or event. It can be conscious or unconscious, and can range from physical changes, such as a reflex or a dilation of the pupils, to psychological changes, such as an emotional reaction or a change in behaviour.
The integrated rate law equation for a first-order reaction is ln(A) = -kt + ln(A0), where A is the concentration of the reactant at any given time, A0 is the initial concentration of the reactant, and k is the rate constant. By plotting ln(A) versus time and fitting the data to the equation, the rate constant k can be calculated from the slope of the best-fit line.
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which of the following best represents the titration halfway to the equivalence point half of the h2o2 has reacted
5 H2O2 ions and 2 Mn ions best represents the titration halfway to the equivalence point half of the h2o2 has reacted.
The equivalence point of an acid is a measure of the strength of the acid. The closer the pH is to 7.0, the stronger the acid, and the more basic (> 7.0 pH) the weaker the acid. If there is a half equivalence point where the pH curve flattens, the flatter and wider the range, the more buffering the acid.
The half equivalence point represents the point at which exactly half of the acid in the buffer has reacted with the titrant. At the half equivalence point, the pKa of the acid is equal to the pH of the solution, so the half equivalence point is relatively easy to determine.
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monomer of nucleic acids made up of a 5-carbon sugar, a phosphate group, and a nitrogenous base
Giant macromolecules known as nucleic acids are composed of nucleotide monomers. Pentose sugar, phosphate group, and nitrogenous base are the three elements that make up nucleotides.
Is DNA or RNA made of phosphate sugar and bases?The nucleotides in a DNA sequence are joined by an alternating grey-dark grey sugar-phosphate backbone. The structural structure of nucleic acids, including DNA and RNA, is composed of the sugar-phosphate backbone. This molecule's directionality is determined by this backbone, which is made up of alternating sugar and phosphate groups.
What are the bases and sugars in RNA?However, RNA is often a single-stranded molecule, unlike DNA. Additionally, the name of the molecule is explained by the fact that ribose, rather than deoxyribose, is the sugar present in RNA. The four nitrogenous bases that make up RNA are adenine, cytosine, uracil and guanine.
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The complete question is: What are monomer of nucleic acids made up of a 5-carbon sugar, a phosphate group, and a nitrogenous base called?
there are three primary gases in the atmosphere n2 makes up 78%, o2 is 21%, and ar is ~1%. (we're ignoring the thousands of trace gases.) a sample of atmosphere is placed in a flask at stp. what is the partial pressure of o2 in the flask?
The flask's partial oxygen pressure is 0.78 atm. 1.72 x 102 mol, -0.21 x atm, and -6.38 x 102 mol
What is the atmosphere of Earth?Vision Learning, a website for learning, claims The composition of the Earth's atmosphere is roughly 78% nitrogen, 21% oxygen, 0.93% argon, 0.04% carbon dioxide, and trace amounts of neon, helium, methane, krypton, ozone, hydrogen, and water vapor.
How do you define atmosphere in a sentence?As it made contact with Earth's atmosphere, the spacecraft broke apart. 2 They were unhealthyly cramped in their living conditions. 3 The ambiance there strikes me as being somewhat impersonal. 4 The environment in towns and cities is contaminated by these pollutants.
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How many milliliters of a 1% (m/v) nacl solution should you use to deliver 18.5 g of nacl?
give your answer to 1 decimal place, with just the numerical value (do not include the units).
18.5 * 10² milliliters of NaCl solution have to use to deliver 18.5g of NaCl.
Given data:
1% (m/v) NaCl
For 18.5g
1g --------------------------100ml
18.5g ---------------- Xml
X = 1850ml
The mass/ volume percent of a result is defined as the rate of the mass of solute that's present in a result, relative to the volume of the result, as a whole. Because this type of attention is expressed as a chance, the indicated proportion must be multiplied by 100.
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consider the two binary compounds al2o3 and n2o3. which is a binary ionic compound and which is a binary covalent compound? explain. al2o3 is properly named aluminum oxide, but n2o3 is named dinitrogen trioxide. explain fully why one name uses greek prefixes and the other does not.
N₂O₃ is a binary covalent compound, and Al₂O₃ is a binary ionic compound.
What you mean when you compound?In chemistry, a compound is a substance made up of two or more different chemical elements in a certain ratio. Once the constituents interact with one another, difficult-to-break chemical bonds are formed. These bonds occur as a consequence of atoms sharing or trading electrons.
b) The named dinitrogen trioxide uses Greek prefixes di- and tri- because it is a molecular compound or a covalent compound because it has both non metal atoms .
Greek prefixes are not used for naming Al₂O₃ because it is ionic compound .
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N₂O₃ is a binary covalent compound, and Al₂O₃ is a binary ionic compound.
What is compound?In chemistry, a compound is a substance made up of two or more different chemical elements in a certain ratio. Once the constituents interact with one another, difficult-to-break chemical bonds are formed. These bonds occur as a consequence of atoms sharing or trading electrons.
The named Dinitrogen trioxide uses Greek prefixes di- and tri- because it is a molecular compound or a covalent compound because it has both non metal atoms .
Greek prefixes are not used for naming Al₂O₃ because it is ionic compound .
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2.00 L of 1.0 M NaCl solution is prepared in a flask. 400.0 mL of the solution is poured out of the flask into a beaker. What is the concentration of the salt solution in the beaker? Give your answer to two significant figures.
Answer:
Explanation:
The concentration of the salt solution in the beaker is 0.50 M.
butane, a natural gas used in lighters, has a molar mass of 58.12 g/mol. How many particles are present inside a lighter if there is 1.00 gram of butane in it?
Number of particles of Butane present inside a lighter is 0.1 x 10^23 particles
It is given that
molar mass of Butane = 58.12 g/mol
given mass of Butane = 1.00 gram
Moles of Butane = given mass/molar mass
1/58.12 g/mol = 0.017 moles
1 moles of Butane = 6.022 x 10^23 particles
0.017 moles = 6.022 x 10^23 x 0.017
= 0.1 x 10^23 particles
Particle number, N, is defined as the number of particles per unit weight of a powder and can be obtained in the following manner.
Hence, Number of particles of Butane present inside a lighter is 0.1 x 10^23 particles
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