# Chemistry;HELP

Volume Problems

Identify the following chemical equations by type.
1. If an electric discharge produces 500 cm3 of ozone (O3), how many cm3 of oxygen (O2) are required?

3O2(g) ---> 2O3(g)

2. When 2.75 dm3 of O2 react with an excess of glucose (C6H12O2), according to the reaction below, what volume of carbon dioxide will be produced?

6O2(g) + C6H12O6(s) ---> 6H2O(g) + 6CO2(g)

3. If an excess of nitrogen gas reacts with 25.0 L of hydrogen gas, according to the reaction below, how many L of ammonia will be produced?

N2(g) + 3H2(g) ---> 2NH3(g)

4. How many cm3 of oxygen would be required to react completely with 250.0 cm3 of hydrogen gas according to the reaction below?

2H2(g) + O2(g) ---> 2H2O(g)

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1. Do you have any ideas?
For #1. you can treat volumes of gases as if they were mols; therefore,
volume O2 required = 500 x (3 mols O2/2 mols O2) = 500 x 3/2 = ?

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