1. Calculations based on Chemical Equations

2. The complete combustion of octane, C8H18, a component of gasoline, proceeds as follows: 2 C8H O2 16 CO H2O 1. How many moles of CO2 are produced when 1.50 moles octane reacted? 2. How many grams water produced in this reaction? 3. How many moles oxygen required to form 90.0 g water?

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Consider the following reaction: If 6.25 g of phosphorus is burned, what mass of oxygen does it combine with?
(6.25 g P4)(1 mol P4 / g P4)(5 mol O2 / 1 mol P4)(32.00 g O2 / 1 mol O2) = 8.07 g O2
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4. Methanol burns in air according to the equation
2CH3OH + 3O CO2 + 4H2O
If 209 g of methanol are used up in the combustion, what mass of water is produced?

5. In a certain experiment 2.50 g of NH3 reacts with 2.85 g of O2.
NH3 + O NO + H2O
Which reactant is the limiting reactant?
How many grams of NO form?
How much excess reactant remains after the liming reactant is completely consumed?

6. In one process, 124 g of Al are reacted with 601 g of Fe2O3
2Al + Fe2O Al2O3 + 2Fe
Identify the Limiting Reactant.
Calculate the mass of Al2O3 formed.
How many grams of excess reactant will be left behind?

7. Given 30.0 g benzene and 65.0 g bromine in the following reaction:
C6H6 + Br C6H5Br + HBr
Identify the limiting reactant.
How many grams of bromobenzene is formed?
If the actual yield of C6H5Br, bromobenzene, is 56.7 g, what is the percentage yield?