Nitrogen gas reacts with hydrogen gas to produce ammonia according to the following equation: N2(g)+3H2–>2NH3(g)
What is the mass of ammonia produced from 6.5 grams of hydrogen reactant, assuming there is a sufficient nitrogen to react? Give an explanation

a. 4 g NH3
b. 8 g NH3
c. 37 g NH3
d. 55 g NH3

Answer:

Explanation:

Force = Mass x Acceleration

(20 - 5)N = 5kg x Acceleration

Acceleration = 15/5

                     = 3 N/kg

Answer:

it's exothermic reaction, becasue it have negative energy and the temperature increases

Answer:

The number of moles of HBr required to react with 2 g of propyne can be calculated by using the balanced chemical equation:

C3 H4 + 2HBr → C3 H6 Br2

The molar mass of propyne is (3 x 12 + 4 x 1) = 40 g/mol

So, 2 g of propyne is equal to 2/40 = 0.05 moles of propyne.

Since 2 moles of HBr are required to react with 1 mole of propyne, then 0.05 moles of propyne would require 0.05 x 2 = 0.1 moles of HBr.

Finally, to find the number of grams of HBr, we multiply the number of moles by its molar mass, which is (1 x 1 + 80 x 1) = 81 g/mol

So, 0.1 moles of HBr is equal to 0.1 x 81 = 8.1 g of HBr.

Answer:

Cellular Respiration: C6H12O6 + 6O2 → 6CO2 + 6H2O. 
Photosynthesis: 6CO2 + 6H2O → C6H12O6+ 6O.

Explanation:

:)

The statements about substances X and Y are true are Y is the solvent in this solution, The presence of Y in the solution lowers the vapor pressure of X and if Y were not present, there would be more X particles in the gas above the liquid solution. Therefore, option A, B and C are correct.

A mixture in which one substance dissolves in the other is called a solution. The solute is the substance that dissolves. The solvent is the substance that does not dissolve. Salt water is an example of a solution.

In a mixture called a solution, every component is well combined. Solutions can contain solids, liquids, and gases and are regarded as homogenous mixes. A solute and a solvent makeup a solution. Any substance that dissolves in a solvent is referred to as a solute.

Thus, option A, B and C are correct.

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C₂H₅OC₂H₅ (Diethyl ether) has the highest viscosity at same temperature.

The order of viscosity possessed by the different fluids at same temperature is given below.

C₂H₅OC₂H₅ (Diethyl ether)

H₂NCH₂CH₂NH₂ (Ethylene diamine)

CH₃CH₂Cl (Chloroethane)

CH₃CH₂CH₂NH₂ (propan-1-amine)

All the above molecules form hydrogen bonding. As, the viscosity could be directly related to hydrogen bonding tendency, ethylene diamine will be more viscous at a given temperature, as it could form hydrogen bonding through two NH₂ groups.

Viscosity is defined as the resistance of a fluid (liquid or gas) to a change in shape, or movement of neighboring portions relative to one another. Viscosity represents opposition to flow. The reciprocal of the viscosity is defined as the fluidity, a measure of the ease of flow.

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Answer:

The student's diagram is correct. The potential energy on the x-axis is increasing, and the potential energy on the y-axis is decreasing, which accurately displays an increase in energy (heat) being absorbed by the reaction. The value of X represents the energy of the reactants, while the value of Y represents the energy of the products. This indicates the reaction is endothermic, as the reactants have a lower energy than the products, meaning energy had to be absorbed from the environment in order to reach a stable state.

Answer:

2, 5 -dimethylheptane

Explanation:

Drawing the full structure would help you understand better

The pressure of a gas that supports a 571 mm column of di‑n‑butyl phthalate is 31.85 torr.

According to the ideal gas equation

P × V = n × R × T

According to Stoichiometry n = m ÷ M or n m ÷ A

P × V = n × R × T

P × V = (m/M) × R × T

P × M = (m/V) × R × T

P × M = ρ  × R × T

For mercury

For C₁₆H₂₂O₄

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The organic compound di‑n‑butyl phthalate, C16H22O4(l), is sometimes used as a low‑density (1.046 g⋅mL−1) manometer fluid.31.85 torr is the pressure in torr of a gas that supports a 571 mm column of di‑n‑butyl phthalate. The density of mercury is 13.53 g⋅mL−1.

The ideal gas equation is represented as: PV = nRT.

In this equation, P refers to the pressure of the ideal gas, V is the volume of the ideal gas, n is the total amount of ideal gas that is measured in terms of moles, R is the universal gas constant, and T is the temperature.

By an ideal gas equation

P × V = n × R × T

Where,

n = number of moles (mol)

R = gas constant

The value of R differs depending on the units used

T = temperature

P = pressure

V = volume

According to Stoichiometry

n = m ÷ M or n m ÷ A

Where,

m = mass (grams)

M = molecular mass (g/mol)

A = atomic mass (g/mol)

A for mercury (Hg) = 200.59 g/mol

A to C = 12 g/mol

A for H = 1 g/mol

A for O = 16 g/mol

M for C₁₆H₂₂O₄

= (16 × 12) + (22 × 1) + (4 × 16)

= 192 + 22 + 64

= 278

P × V = n × R × T

P × V = (m/M) × R × T

P × M = (m/V) × R × T

The formula for density

ρ = m/V

ρ = density

P × M = ρ  × R × T

For mercury

For 1 mm mercury, the pressure is 1 torr

h = 571 mm

P mercury = 571 mm × 1 torr

P mercury = 571 torr

ρ = 13.53 g/mL

P × M = ρ  × R × T

P × A = ρ  × R × T

571 × 200.59 = 13.53  × R × T

RT = 114,536.89 / 13.53

RT = 8,465.402 torr mL mol⁻¹

For C₁₆H₂₂O₄,

RT = 8,465.402 torr mL mol⁻¹ because same condition as mercury

ρ = 1.046 g/mL

P × M = ρ  × R × T

P × 278 = 1.046  × 8,465.402

P = 8,854.81 / 278

P = 31.85 torr

Thus, 31.85 torr is the pressure in torr of a gas that supports a 571 mm column of di‑n‑butyl phthalate. The density of mercury is 13.53 g⋅mL−1.

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Answer:

The molar mass of an unknown gas can be determined using the concept of effusion. Effusion is the process of a gas passing through a small hole or porous partition. The rate of effusion of a gas is inversely proportional to the square root of its molar mass. This relationship is described by the Graham's law of effusion.

Explanation:

Graham's law of effusion states that the rate of effusion of a gas is inversely proportional to the square root of its molar mass.

R = k √M

Where R is the rate of effusion, k is a constant, and M is the molar mass of the gas.

If we know the rate of effusion of COCl2 and the rate of effusion of an unknown gas and we know that the unknown gas effuses at a rate 1.5 times the rate of COCl2.

R unknown = 1.5 * R COCl2

We can use this information to find the molar mass of the unknown gas.

M = (R COCl2 / (1.5 * R unknown) )²

If we know the molar mass of COCl2, we can substitute it in the equation and solve for the molar mass of the unknown gas.

It's worth noting that this problem requires you to know the molar mass of COCl2 which is not provided in the question. And also it's important to know that the values of the constant k in the equation for the different gases are not the same, so you need to use the same gas as reference.

Answer:

To find the number of moles in 78.3 grams of ammonium sulfite, you would divide the mass by the molar mass of the substance. The molar mass of ammonium sulfite is (14.0067 + 14.0067 + 32.065 + 64.0638) g/mol = 124.1472 g/mol.

78.3 g / 124.1472 g/mol = 0.63 moles

Explanation:

Answer:

0,6746 moles of ammonium sulfite

Explanation:

(NH₄)₂SO₃  - ammonium sulfite [tex]\equiv \, N_2H_8SO_3[/tex]

Atomic weight of each element:

N = 14.00 * 2  = 28

H = 1.00   * 8  = 8

S = 32.065 * 1 = 32.065

O = 16 * 3 =  48

Total atomic weight = 28 + 8 + 32.065 + 48

Total atomic weight = 116,065 gr/mol

[tex]78.3\,g \,* \frac{1mol\,of\, (NH_4)_2SO_3}{116.065g \, \,of \, (NH_4)_2SO_3 } \approx 0,6746\, moles \, of \, (NH_4)_2SO_3[/tex]

Answer: A point or an object moving in a straight line is accelerated if it speeds up or slows down.

Explanation:  Motion on a circle is accelerated even if the speed is constant, because the direction is continually changing. For all other kinds of motion, both effects contribute to the acceleration.

Answer:

Molecular formula = N2O4

Explanation:

Step 1: Assume that the mass of a compound is 100%

Step 2: Calculate the number of moles of each element

Step 3: Represent an empirical formula

Step 4: Divide the number of moles of each element by the least number of moles

Step 5: Write the empirical formula

Step 6: Calculate the empirical mass

Step 7: Represent a molecular formula

Step 8: Solve for n by dividing molecular mass by empirical mass

Step 9: Multiply the subscripts of the empirical formula by the value of n to obtain the molecular formula

This molecule is known as 2-(Phenylethyl) tetrahydrofuran.

Benzene is a colourless liquid chemical at room temperature. It is utilised primarily as a solvent in the pharmaceutical and chemical industries, as a starting material and an intermediate in the synthesis of numerous chemicals, and in gasoline. Both natural and man-made processes produce benzene.

Benzene is one of the most important organic compounds with the chemical formula C₆H₆. Benzene is the parent compound of various aromatic compounds.

2-(Phenylethyl) tetrahydrofuran has a ring structure of benzene (C₆H₅), and an alkyl group (CH₂CH₃) attached to it. The molecule has a total of 16 carbon atoms and 33 hydrogen atoms.

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The compound is non polar covalent in  its structure as said above.

Let us recall that the melting point has to do with the temperature at which there is the conversion of the solid to a liquid. We know that the melting point of the compound would depend on the structure of the compound.

If the compound would have a melting point that is about  20°C, the implication is that the compound is not be held by very strong intermolecular forces hence it must be covalent.

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Answer:

Explanation:

Atoms of sodium and chlorine are both elements, meaning they are made up of only one type of atom. Both have an atomic number of 11, which means they have 11 protons in their nucleus, but the number of neutrons and electrons differ. Sodium has 12 neutrons and 11 electrons, while chlorine has 17 neutrons and 17 electrons.

Atoms of sodium and chlorine are also both reactive, meaning they form chemical bonds with other elements. However, sodium is more reactive than chlorine, which is why it often forms compounds with other elements, such as sodium chloride (NaCl).

Atoms of sodium and chlorine are also similar in that they both have the same number of electrons in their outer shells. This means they can both form two covalent bonds with other elements. However, because the number of electrons and neutrons in each atom is different, the strength of the bonds they form will differ.

Overall, atoms of sodium and chlorine are similar in that they both have 11 protons and can form two covalent bonds, but they differ in their number of neutrons and electrons, which affects the strength of the bonds they form and their reactivity.

The beaker of orthoxylene was put inside a sealed tank containing orthoxylene gas at 142. degree C and 893. torr will have the same amount of liquid inside it after ten minutes because the system is a closed system as none of the liquid's vapor escapes.

The correct option is the same amount.

A closed system allows energy to enter and exit but not matter to enter or exit. About a closed system is a covered pot on the burner. Both matter and energy cannot enter or leave an isolated system. A thermos or cooler is about as isolated a system as there is.

The beaker of orthoxylene that was put inside a sealed tank containing orthoxylene gas at 142 degrees C and 893 torr is a closed system.

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Answer:

d. population growth.

Explanation:

Answer:

The date when the animal was buried can be estimated by using the decay rate of Carbon-14. The half-life of Carbon-14 is 5,730 years, so the date when the animal was buried can be estimated by taking the half-life and multiplying it by the logarithm of the ratio of the 14C/12C ratio of the bone and the 14C/12C ratio of a living plant or animal. In this case, 5,730 years x log(0.477) = 45,906 years ago.

Explanation:

The heat that we are going to need so as to be able to vaporize the water is 40.4 kJ.

We know that the term thermal energy has to do with the energy that can be supplied to the water as heat when we raise the temperature of the water. In this case, we can see that we are dealing with  the thermal energy needed to completely vaporize 18.02 g of water at 100 degrees Celsius.

We know that the heat that is required can be obtained from the formula;

H = mL

m= mass of the water

L = latent heat of vaporization of water

H =  18.02 g * 2240 J/g

H = 40.4 kJ

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Answer:

So the new concentration of the solution is 0.0001M

Explanation:

To dilute a solution by three orders of magnitude, we need to add 3 zeroes, that is 10^3 times the original volume.

The new concentration would be 0.1M / (10^3) = 0.0001M (4 sig figs)

So the new concentration of the solution is 0.0001M

The boiling point of benzene when the external pressure is 440 torr is 80.1 °C (176.2 °F).

What is benzene?

Benzene is an organic compound composed of six carbon atoms in a ring structure, with one hydrogen atom attached to each carbon atom. It is a highly flammable, colorless liquid with a sweet smell. Benzene is a natural component of crude oil and is one of the most important organic chemicals used in industry. It is used in the production of plastics, resins, synthetic fibers, rubber, pesticides, detergents, drugs, and dyes. It is also used as a solvent for fats, oils, waxes, resins, and inks. Benzene is classified as a carcinogen and its exposure can cause a variety of adverse health effects, including acute myelogenous leukemia, lymphomas, and other forms of cancer.

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The relative molecular mass of hydrated Copper (II) tetraoxosulphate (VI) CuSO4.5H₂O is 249.

Molecular mass is a measure of the total mass of one mole of a substance, which is defined as the mass of the substance divided by the number of molecules it contains. It is typically expressed in g/mol and is also known as molar mass. Molecular mass is determined by the types and number of atoms that compose a molecule, and is an important factor in understanding the properties of a substance.

This is calculated by adding the atomic masses of all the atoms present in the compound.
The atomic mass of copper is 64, sulphur is 32, oxygen is 16, and hydrogen is 1.
So, the relative molecular mass of hydrated Copper (II) tetraoxosulphate (VI) CuSO4.5H₂O is 64 + 32 + (16*4.5) + (1*5) = 249.

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The Method of Mixtures Electrical Method is a method used to determine the electrical conductivity of a material.

The Electrical Method is a geophysical prospecting technique that uses electrical resistivity to map subsurface features, such as geological structures, fractures, and mineral deposits.

It involves measuring the amount of current that passes through a mixture of two materials under the application of a known voltage. The electrical conductivity of each material can then be determined by calculating the ratio of the current to the applied voltage. The electrical conductivity obtained from the Method of Mixtures Electrical Method can be used to characterize materials such as semiconductors and insulators.

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Answer:

Explanation:

The equivalent mass of the metal can be calculated using the following equation:

Equivalent Mass = (3.15 g Nitrate)/(1.35 g Metal Oxide) * (1 mole Nitrate)/(1 mole Metal Oxide)

Using the molar masses of nitrate (NO3) and metal oxide (MO):

Equivalent Mass = (3.15 g NO3)/(1.35 g MO) * (1 mol NO3)/(1 mol MO)

= (3.15 g NO3)/(1.35 g MO) * (62.00 g NO3)/(molar mass of MO)

The molar mass of the metal oxide (MO) must be known to calculate the equivalent mass of the metal.

The signal-to-noise ratio (S/N) is a measure of the strength of the signal relative to the noise. In this case, the signal is the absorbance reading of 0.002 absorbance units, and the noise is the standard deviation of the noise, which is 0.0005 absorbance units.

The S/N for the 1 cm path length measurement is:

S/N = (signal) / (noise) = 0.002 absorbance units / 0.0005 absorbance units = 4

If the path length is increased to 5 cm and the number of scans is increased to 65, the signal will also increase by a factor of 5, but the noise will not change. Therefore, the signal will be 5 times larger and the noise will be the same, so the S/N will increase.

The signal for the new measurement is 5 * 0.002 = 0.01 absorbance units

The S/N for the new measurement is:

S/N = (signal) / (noise) = 0.01 absorbance units / 0.0005 absorbance units = 20

When you increase the path length by 5 times, the signal increases by 5 times, but the noise remains the same. Therefore, the signal-to-noise ratio will increase by a factor of 5. Similarly when you increase the number of scans, you are averaging the signal, which will reduce the noise, but the signal will remain the same. So the signal-to-noise ratio will increase.

The mass of water that can be obtained is 2.2 g of water.

We know that in the case that we have here, we are going to depend on the stoichiometry of the reaction and this is very important in the determination of the amount of the water that can be formed.

Now we can see that the reaction equation can be written from the fact that; [tex]2H_{2} (g) + O_{2} (g) ---- > 2H_{2} O(g)[/tex]. Then we can see that in this kind of chemical reaction we have to apply the stoichiometry.

Number of moles of the hydrogen = 14.8g/2 g/mol = 7.4 moles

Number of moles of oxygen = 34.8 g/32 g/mol = 1.1 moles

Given that 2 moles of hydrogen reacts with 1 mole of oxygen

7.4 moles of hydrogen reacts with 7.4 * 1/2

= 3.7 moles

Hence oxygen is the limiting reactant.

1 mole of oxygen produces 2 moles of water

1.1 moles of oxygen would produce 1.1 * 2/1

= 2.2 moles of water

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