Nitric acid can be produced from the reaction shown below. How many liters of N H 3 ( g ) at 850 degrees Celsius and 5.00 atm are required to react with 1.00 moles of O 2 ( g ) in this reaction? 4 N H 3 ( g ) + 5 O 2 ( g ) → 4 N O ( g ) + 6 H 2 O ( g )

Answer:

Explanation:

This practical can be used to introduce the idea that the relative amounts of a fuel and oxygen (from air) are important in combustion, and that there will be an optimum ratio in which the two substances react. This leads on to the idea of chemical equations.

In the case of a class experiment, where students generate the hydrogen themselves under strict supervision, all the hydrogen generators must be collected once the test tubes have been filled and before any flames are lit, to prevent the possibility of accidental or deliberate ignition of the hydrogen in the generator. This has caused a number of accidents in the past. Alternatively the test tubes could be filled with hydrogen beforehand, or by students under supervision, from a steady cylinder supply.

Answer:

Option B, Capillary action

Explanation:

Water molecules attach with the molecules of the surface of the container in which they are kept. This is because of the cohesive force within the molecules of water and adhesive force between the molecules of water and other substances.

The water rises up in a capillary tube because of water molecules adhere at the edges thereby creating a meniscus in the upside turned direction. The surface is kept intact by the surface tension

Now capillary action specifically occurs when adhesion to the surface of the container is higher than the cohesion between the water molecules.  

Hence, option B is correct

Answer:

motion is the phenomenon in which an object changes its position over time. Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed, and time.

Explanation:

Answer:

why is this in chemistry? this is physics.

Explanation:

Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed, and time.

Answer: PLease see answer in explanation column

Explanation:

FIRST STEP

We  find the grams ( mass ) of solute required to prepare the solution by using  the formula

grams ( mass ) of solute, g(CaCl2)= Molar mass x Molarity of the solution x Volume of the solution

Therefore Preparing 750 mL of 1.5 M calcium chloride solution, we have that Molar mass of Calcium chloride =110.98 g/mol

g(CaCl2) =110.98 g/mol X 1.5mol/L X 0.75L

g(CaCl2) =124.8525g CaCl2

SECOND STEP

Now Dissolve 124.8525g CaCl2 in about 350ml of distilled water then add more water until the final volume be comes 750ml

The pH of a 0.40 M solution of benzoic acid C₆H₅COOH is 2.69. Benzoic acid C₆H₅COOH is a weak organic acid. When it is dissolved in water, it partially dissociates to form hydronium ions (H3O+) and benzoate ions (C₆H₅COO⁻).

C₆H₅COOH(aq) + H2O(l) ⇌ C₆H₅COO⁻(aq) + H3O+(aq)The equilibrium expression for this dissociation reaction is given by the equation below. Ka = [H3O+][C₆H₅COO⁻] / [C₆H₅COOH]Where Ka is the acid dissociation constant of benzoic acid, [H3O+] is the concentration of hydronium ions, [C₆H₅COO⁻] is the concentration of benzoate ions, and [C6H5COOH] is the concentration of benzoic acid.

The value of Ka for benzoic acid is 6.46 x 10⁻⁵ at 25°C. Using the given concentration of benzoic acid, we can determine the concentrations of hydronium ions and benzoate ions.[C₆H₅COOH] = 0.40 MC₆H₅COO⁻ = H₃O⁺ = xKa = (x)₂ / (0.40 - x) Where x is the concentration of hydronium ions and benzoate ions. The assumption that x is much less than 0.40 M is valid because benzoic acid is a weak acid.

Thus, we can simplify the equation above as follows. Ka = (x)2 / 0.40Solving for x, we get. x = √(Ka x 0.40)x = √(6.46 x 10⁻⁵ x 0.40)x = 1.02 x 10⁻³ M. The concentration of hydronium ions is equal to 1.02 x 10⁻³ M. Using the definition of pH, we can determine the pH of the solution.

pH = -log[H₃O⁺]pH = -log(1.02 x 10⁻³)pH = 2.69Therefore, the pH of a 0.40 M solution of benzoic acid C₆H₅COOH is 2.69.

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Answer: c

Explanation: the particles stay together but has some gain more heat they break apart.

The ideal gas law, which relates the pressure, volume, temperature, and number of moles of an ideal gas, can be applied to real-world situations. By considering a specific scenario and applying the ideal gas law, we can analyze the behavior of gases and make predictions about their properties.

Let's consider a situation where a scuba diver is exploring underwater at a depth of 30 meters. We can apply the ideal gas law, specifically the form known as Boyle's law, which states that the pressure and volume of a gas are inversely proportional at constant temperature.

Question: How does the pressure of the gas in the scuba tank change as the diver descends to a depth of 30 meters, assuming the temperature remains constant?

To answer this question, we can use the ideal gas law equation PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature. By keeping the temperature constant, we can observe the relationship between pressure and volume as the diver descends and calculate the change in pressure based on the change in volume.

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Answer:

they both revolve or rotate around something

Explanation:

The earth revolves around the sun and the moon rotates around the earth.

Answer:

0.5 moles OF CARBON WILL BE BURNT SHOULD 196.5 kJ OF HEAT IS LIBERATED IN THE REACTION.

Explanation:

The standard heat of combustion of a substance is the heat evolved when one mole of the substance is burned completely in oxygen under standard conditions.

From the reaction, -393kJ of heat is required to burn 1 mole of Carbon completely in oxygen.

C(s) + O2 (g) -----> CO2(g)        -393 kJ mol^-1

Should 196.5 kJ of heat was evolved by the reaction, the number of moles of carbon to be produced will be x moles;

-393 kJmol^-1 of heat was required to burn 1 mole of Carbon

196.5 kJ/mol of heat will burn x moles of carbon.

x = ( 196.5 * 1 / -393)

x = -0.5 moles

0.5 moles of carbon will be burnt when 196.5 kJ of heat is liberated

1) The electron domain geometry of hydrogen sulfide is tetrahedral with two bond pairs and two lone pairs and a bond angle of 104°

2) The electron domain geometry of methyl iodide is tetrahedral with four  bond pairs and a bond angle of 109°.

3) The electron domain geometry of methyl tetrabromide is tetrahedral with four  bond pairs and a bond angle of 109°.

4) The electron domain geometry of  Tellurium tetrabromide is trigonal bipyramidal with a bond angle of 120° and 90° respectively.

We know that the bond angle has to do with the dihedral angle that exists between two atoms that are attached to the same central a tom in a compound. The bond angle is influenced by so many thing and the most important of them is the number and types of electron pairs that can be found on the valence shell of the central atom of the compound.

We can see here that by considering the number of electron pairs, we can determine the electron domain geometry and the shape of the molecule.

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The statement "Isotopes with an even number of both protons and neutrons are generally stable" is TRUE.

Isotopes with an even number of protons and neutrons are known as isotopes. A single element can have a different number of neutrons; such elements are known as isotopes. A nucleus containing a different number of neutrons will have a different mass number than the element's standard atomic number since the mass number is equal to the number of neutrons plus the number of protons in the nucleus.

There are 275 isotopes recognized for 81 stable elements, while there are 50 isotopes for elements that are radioactive and occur naturally.

Isotopes with an even number of both protons and neutrons tend to be more stable, as the strong nuclear force and the electromagnetic force in a nucleus cancel out, causing a more stable nucleus. The vast majority of stable elements have a nearly equal number of neutrons and protons, though there are some exceptions, such as beryllium-8 and helium-3.

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The chemical reaction between aqueous calcium hydroxide (Ca(OH)2) and carbon dioxide (CO2) dissolved from air can be represented as follows:

Ca(OH)2(aq) + CO2(g) → CaCO3(s) + H2O(l)

In this reaction, calcium hydroxide reacts with carbon dioxide to form calcium carbonate and water.

This reaction can potentially affect the results of titration of calcium hydroxide with HCl. When carbon dioxide reacts with calcium hydroxide, it forms calcium carbonate, which is insoluble in water. The formation of calcium carbonate can lead to the formation of a precipitate, which can interfere with the titration process.

During the titration, HCl is added to react with the calcium hydroxide to determine its concentration. However, if the calcium hydroxide has reacted with carbon dioxide from the air, some of it would have been converted to calcium carbonate, reducing the concentration of calcium hydroxide available for titration. This would result in a lower observed concentration of calcium hydroxide and could lead to inaccurate titration results.

To minimize the impact of this reaction, it is important to perform the titration in a controlled environment with minimal exposure to air to prevent the dissolution of carbon dioxide. Additionally, the titration should be performed promptly after preparing the calcium hydroxide solution to minimize the exposure time to air.

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Reversible protein phosphorylation controls the activity, structure, and cellular localization of many types of proteins. Protein kinases add a phosphoryl group to proteins while protein phosphatases remove them.

The amino acids that are able to be phosphorylated are the hydroxyl-containing side chains of serine, threonine, and tyrosine. The covalent addition of a phosphate group to an amino acid side chain can effect conformational change of a protein in three general ways:

1. Charge change: The negatively charged phosphate group will change the electrostatic properties of the amino acid side chain to which it is attached, thus disrupting salt bridges, and charge interactions that stabilize the protein's native conformation.

2. Steric hindrance: The addition of a phosphate group increases the size of the amino acid side chain, which can create steric hindrance. This can introduce a kink or bend in the polypeptide chain that leads to conformational changes of the protein.

3. Hydrogen bonding: The addition of a phosphate group to an amino acid side chain can introduce a hydrogen-bonding group into the protein structure.

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Answer:

Freezing

Explanation:

Freezing is the process in which a liquid changes to a solid. It occurs when a liquid cools to a point at which its particles no longer have enough energy to overcome the force of attraction between them. The freezing point of a substance is the temperature at which it freezes. The freezing point of pure water is 0°C.

Answer:

freezing

Explanation:

Once it gets cold enough (around 32 degrees Fahrenheit), the expanding water molecules begin to form ice crystals. This spreading-out of water molecules as it freezes is why sometimes a bottle full of water will break when you freeze it. The fact that water expands when frozen is also really important to life on Earth.

The heat generated by the reactor core of a nuclear power plant used to provide power to buildings by generating steam, which turns a turbine, powering a generator and the correct option is option C.

Nuclear power plants are a type of power plant that use the process of nuclear fission in order to generate electricity.

The steam is used to spin large turbines that generate electricity. Nuclear power plants use heat produced during nuclear fission to heat water.

In nuclear fission, atoms are split apart to form smaller atoms, releasing energy. Fission takes place inside the reactor of a nuclear power plant.

Nuclear power plants are very similar to coal-fired power plants. However, they require different safety measures since the use of nuclear fuel has vastly different properties from coal or other fossil fuels.

Therefore,  The heat generated by the reactor core of a nuclear power plant used to provide power to buildings by generating steam, which turns a turbine, powering a generator and the correct option is option C.

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The product of the reaction between BCl3 and NH3 is the ionic compound, Ammonium Chloride (NH4Cl).

Reaction is the process of responding to a stimulus. It can be physical, emotional, or both. It is a way for a person, animal, or living organism to communicate with the environment and other living things. A reaction is often an involuntary response that occurs due to a change in the environment. For example, a person may jump in fear if a loud noise is heard. This reaction is the body's way of quickly responding to the stimulus. Reactions can also be learned over time and can be either positive or negative. For example, a person may smile when they see a loved one, or they may frown when they are angry. Reactions are an important part of how we interact with the world and with each other.

The product of the reaction between BCl3 and NH3 is the ionic compound, Ammonium Chloride (NH4Cl). The reaction can be written as:
BCl3 + NH3 → NH4Cl
The chemical structure of Ammonium Chloride is shown below:
NH4Cl
The central atom, nitrogen, is surrounded by four hydrogen atoms (H) and one chlorine atom (Cl). The nitrogen atom has a formal charge of +1 and is therefore surrounded by four hydrogen atoms with a negative charge of -1. The chlorine atom has a formal charge of -1 and is therefore surrounded by one ammonium ion with a positive charge of +1.

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Answer:

The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs. 

Explanation:

The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs. 

Surface tension is a liquid characteristic that accounts for why acetone does not form beads on a windshield but water does.

The amount of force necessary to separate a liquid's surface is measured by its surface tension. High surface tension is caused by the attraction of water molecules to one another rather than to the surface they are in contact with. As a result of this attraction, water molecules limit their contact with the surface area, generating droplets with a high contact angle, which cause water to bead up on hydrophobic surfaces like a windshield. Acetone spreads out on surfaces rather than forming droplets due to its lower surface tension than water, which lowers the contact angle.

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Answer:

131.6 L

Explanation:

Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore, the correct option is option B that is 131.5l. There is no force of attraction between the particles.

Ideal gas equation is the mathematical expression that relates pressure volume and temperature. Ideal gas is a hypothetical gas. Vanderwaal behave as ideal gas at high temperature and low pressure.

Mathematically,

PV=nRT

where,

P = pressure=1 atm

V= volume=?

n =number of moles=given mass/ molar mass

                                =  492.2/ 83.79

                                = 5.87 moles

T =temperature = 273K

R = Gas constant = 0.0821 L.atm/K.mol

1× V = 5.87 × 0.0821 L.atm/K.mol × 273 K

V =131.5l

131.5l is the  volume of a 492.2g sample of Kr gas.

Therefore, the correct option is option B that is 131.5l.

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According to the Bohr model, electrons orbit the nucleus at constant energies then the speed of the electron is I = 1.05 mA.

The Bohr model, also known as the Rutherford-Bohr model, was first proposed by Niels Bohr and Ernest Rutherford in 1913 and describes an atomic system with an orbiting system of electrons and a small, dense nucleus that is similar to the Solar System in structure but is attracted by electrostatic forces rather than gravity.

Speed of electron = v = 2.19 × 1\($$0^6\)  m/s

Radius of circular path = \($\gamma\) = 5.29 × 1\(0^{11}\) m

The period of electron Pn its orbits is,

T = 2π\(\gamma\) / V

To find the current represented by the orbiting electron

I (ΔQ/Δf) = |e|/T = |e|V /2πr

substitute the value in the above equation, we get

\($I=\frac{\left(2.19 \times 10^6\right)\left(1.60 \times 10^{-19}\right)}{2(8.14)\left(5.29 \times 10^{-11}\right)} \\\)

simplifying the equation, we get

I = 1.75 × 10-³  C/s

I = 1.05 mA

Therefore, the speed of the electron is I = 1.05 mA.

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a. Pure Water:

HCl will react with water to form H3O+ and Cl- ions:

HCl + H2O → H3O+ + Cl-

Since the water is initially neutral, the initial concentration of H3O+ is 1.0 x 10^-7 M. Adding 0.010 mol of HCl to 500.0 mL of water will result in a final volume of 500.010 mL (assuming negligible volume change upon addition of HCl). Thus, the final concentration of H3O+ is:

[H3O+] = moles HCl / final volume in L

[H3O+] = 0.010 mol / 0.500010 L

[H3O+] = 0.00002 M

pH = -log[H3O+]

Initial pH = -log(1.0 x 10^-7) = 7.00

Final pH = -log(0.00002) = 4.70

b. Buffer Solution of HC2H3O2 and NaC2H3O2:

The buffer solution contains both a weak acid (HC2H3O2) and its conjugate base (C2H3O2-), which will resist changes in pH upon the addition of an acid or a base. The initial pH of the buffer solution can be calculated using the Henderson-Hasselbalch equation:

pH = pKa + log([base]/[acid])

The pKa of acetic acid (HC2H3O2) is 4.76. Substituting the given concentrations, the initial pH of the buffer solution is:

pH = 4.76 + log(0.115/0.125)

pH = 4.74

When HCl is added, it reacts with the weak base (C2H3O2-) in the buffer solution to form the weak acid (HC2H3O2) and Cl- ions:

HCl + C2H3O2- → HC2H3O2 + Cl-

The change in concentration of the weak acid and its conjugate base can be calculated using the balanced equation and the initial concentrations of the buffer components:

moles of HC2H3O2 formed = moles of HCl added

moles of C2H3O2- consumed = moles of HC2H3O2 formed

moles of NaC2H3O2 remaining = moles of C2H3O2- remaining

[HCl] = 0.010 mol / 0.500 L = 0.020 M (concentration of added HCl)

[HC2H3O2] = 0.125 M (initial concentration of weak acid)

[C2H3O2-] = 0.115 M (initial concentration of conjugate base)

[NaC2H3O2] = 0.115 M (initial concentration of salt)

Using an ICE table (Initial, Change, Equilibrium) to calculate the final concentrations:

Initial:

[HC2H3O2] = 0.125 M

[C2H3O2-] = 0.115 M

[NaC2H3O2] = 0.115 M

Change:

[HC2H3O2] = 0.125 M + 0.010 mol / 0.500 L = 0.145 M

[C2H3O2-] = 0.115 M - 0.010 mol / 0.500 L = 0.095 M

[NaC2H3O2] = 0.115 M -

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Materials generally become warmer when they are "absorbed" by light, this statement is more detailed. So, the correct answer is "absorbed by them."

Explanation: When a material absorbs light, it receives energy from the light, which leads to an increase in temperature. When light is absorbed by a material, the energy of the light is transformed into internal energy in the material. The temperature of a material can increase as a result of this energy absorption.

This is due to the fact that the increased internal energy of the molecules in the material causes them to vibrate more quickly and hence results in a temperature rise.

The light reflects or transmits when it passes through the material. When light reflects off a surface, it bounces back in the opposite direction. Transmitted light travels through a material without being absorbed by it.

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Answer: it is an heterogeneous mixture

Explanation: it is heterogeneous mixture because the particles in it are not well scattered which causes layers to form in the mixture

Answer:

They need to use energy from other tress to survive so that they can do basic functions, like absorbing nutrients from the ground, and growing back leaves. They don't have chlorophyll, so they need that energy to do the functions I mentioned above.

Explanation: Hope this helps!

Answer:

Trees need chlorophyll to make energy. Because albino trees don’t have chlorophyll, they can’t create their own energy. So, they must take energy from other trees to survive.

Explanation:

Answer:

C₃H₅N₃O₉

Explanation:

Molar mass of nitroglycerin (Ratio of mass and moles of the compound) is:

1.00g / 0.0041mol = 226.8g/mol

We can write the equations:

0.6H = C (1)

-60% as many carbon atoms as hydrogen atoms-

3N = O (2)

C = N

Using as basis the atoms of Carbon:

Carbon = 1

Nitrogen = 1

Oxygen = 3

Hydrogen = 1/0.6 = 1.67

A molecular formula has just whole numbers. This ratio of atoms times 3:

Carbon = 3

Nitrogen = 3

Oxygen = 9

Hydrogen = 5

C₃H₅N₃O₉. Molar mass of this formula is:

C = 12.01g/mol*3 = 36.03g/mol

H = 1.01g/mol*5 = 5.05g/mol

N = 14g/mol*3 = 42g/mol

O = 16g/mol*9 = 144g/mol

Molar mass:

36.03g/mol + 5.05g/mol + 42g/mol + 144g/mol = 227g/mol ≈ 226.8g/mol

That means molecular formula of nitroglycerin is:

The molecular formula of nitroglycerin is C₃H₅O₉N₃

Mass of nitroglycerin = 1.00 g

A number of moles of nitroglycerin =  0.0041 mol

It is required to calculate the molecular formula of nitroglycerin.

An empirical formula tells us the relative ratios of different atoms in a compound.

The molecular formula of nitroglycerin can be estimated with the help of empirical formula.

The molar mass of nitroglycerin (Ratio of mass and moles of the compound) is:

1.00g / 0.0041mol = 226.8 g/mol

We can write the equations:

0.6H = C (1)

-60% as many carbon atoms as hydrogen atoms-

3N = O (2)

C = N

Using as basis the atoms of Carbon:

Carbon = 1

Nitrogen = 1

Oxygen = 3

Hydrogen = 1/0.6 = 1.67

A molecular formula has just whole numbers. This ratio of atoms times 3:

Carbon = 3

Nitrogen = 3

Oxygen = 9

Hydrogen = 5

C₃H₅N₃O₉.

Molar mass of this formula is:

C = 12.01g/mol*3 = 36.03g/mol

H = 1.01g/mol*5 = 5.05g/mol

N = 14g/mol*3 = 42g/mol

O = 16g/mol*9 = 144g/mol

Molar mass:

36.03g/mol + 5.05g/mol + 42g/mol + 144g/mol = 227g/mol ≈ 226.8g/mol

That means molecular formula of nitroglycerin is:

C₃H₅N₃O₉

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