To convert from a given quantity of one reactant or product tothe quantity of another reactant or product:

First, convert the given quantity to moles. Use molar masses toconvert masses to moles, and use Avogadro's number (6.02×1023particles per mole) to convert number of particles to moles.

Next, convert moles of the given reactant or product to moles ofthe desired reactant or product using the coefficients of thebalanced chemical equation. For example, in the chemicalequation

2H2+O2→2H2O

the coefficients tell us that 2 mol of H2 reacts with 1 mol ofO2 to produce 2 mol of H2O.

Finally, convert moles of the desired reactant or product backto the desired units. Again, use molar masses to convert from molesto masses, and use Avogadro's number to convert from moles tonumber of particles.

part A. How many grams of NH3 can be produced from 3.19 mol ofN2 and excess H2.

part B. How many grams of H2 are needed to produce 14.94 g ofNH3?

part C. How many molecules (not moles) of NH3 are produced from3.33×10^−4 g of H2?

2. When methane (CH4) burns, it reacts with oxygen gas toproduce carbon dioxide and water. The unbalanced equation for thisreaction is

CH4(g)+O2(g)→CO2(g)+H2O(g)

This type of reaction is referred to as a completecombustion reaction.

Part a. What mass of carbon dioxide is produced from thecomplete combustion of 2.00×10^−3 g of methane?

Part b. What mass of water is produced from the completecombustion of 2.00×10^−3 g of methane?

Part c. What mass of oxygen is needed for the completecombustion of 2.00×10^−3 g of methane?

3. Aluminum reacts with chlorine gas to form aluminum chloridevia the following reaction:

2Al(s)+3Cl2(g)→2AlCl3(s)

Aluminum reacts with chlorine gas to form aluminum chloride viathe following reaction:

2Al(s)+3Cl2(g)→2AlCl3(s)

Part a. What is the maximum mass of aluminum chloride that canbe formed when reacting 31.0 g of aluminum with 36.0 g ofchlorine?

Express your answer to three significant figures and include theappropriate units.

4.

Determine the balanced chemical equation for this reaction.

C8H18(g)+O2(g)→CO2(g)+H2O(g)

Enter the coefficients for each compound in order, separated bycommas. For example, 1,2,3,4 would indicate one mole of C8H18, twomoles of O2, three moles of CO2, and four moles of H2O.

5. 1.66 g H2 is allowed to react with 10.3 g N2, producing 1.62g NH3.

Part A

What is the theoretical yield in grams for this reaction underthe given conditions?

Express your answer to three significant figures and include theappropriate units.

You are given 31.0 g of aluminum and 36.0 g of chlorine gas.

Part B

What is the percent yield for this reaction under the givenconditions?

Express your answer to three significant figures and include theappropriate units.