Moles of Reactant to Moles of Product: Use mole ratiofrom balanced chemical equation.

1.Ammonia burns in oxygen according to the followingequation:

4 NH₃ + 3 O₂  → 2 N₂ + 6H₂O

How many moles of nitrogen gas are generated by the completereaction of 8.23 moles of ammonia? Express your answer to twodecimal places.

mol N₂

2.

Moles of Product to Moles of Reactant: Use mole ratiofrom balanced chemical equation.

The commercial process used to make nitric acid is asfollows:

3 NO₂(g) +H₂O(l)  → 2HNO₃(aq) + NO(g)

How many moles of nitrogen dioxide are required to produce 7.19moles of nitric acid? Express your answer to two decimalplaces.

mol NO₂

3.

Moles of Reactant to Mass of another Reactant: Balanceequation. Use mole ratio, then convert to grams.

Balance the chemical equation showing the reaction of sulfuricacid with calcium phosphate to produce phosphoric acid and calciumsulfate:

Ca₃(PO₄)₂(s)+   H₂SO₄(aq)  →   CaSO₄(s)+   H₃PO₄(aq)

What mass of calcium phosphate is needed to completely reacted with6.665 moles of sulfuric acid? Express your answer to two decimalplaces.

g Ca₃(PO₄)₂

4.

Moles of Product to Mass of Each Reactant: Perform aseparate calculation for each reactant. Use mole ratio, thenconvert to grams.

If 0.63 moles of carbon monoxide gas are produced by thefollowing reaction, how many grams of silicon dioxide and of carbonwere reacted (assume just enough of each)? Express your answer totwo decimal places.

SiO₂(s) + 2 C(s)  →Si(l) + 2 CO(g)

Mass of SiO₂ needed:  g

Mass of C needed:  g

5.

Moles of Reactant to Mass of Reactant: Identify theiodide ions and ozone in the balanced chemical equation. Use moleratio, then convert to grams.

A method used by the EPA for determining the ozone concentrationin the air is to pass an air sample through a bubbler containingiodide ions. The iodide ions remove the ozone according to thefollowing reaction:

O₃(g) + 2 I^-(aq) +H₂O(l)  → O₂(g) +I₂(aq) + 2 OH^-(aq)

How many grams of ozone can be removed from the air sample if 5.11moles of iodide ions are present in the bubbler? Express youranswer to two decimal places.

g