Question

In the following reaction, how many grams of oxygen will react with 10.47 grams of benzene (C6H6)?

2C6H6 + 15O2 12CO2 + 6H2O
The molar mass of benzene is 78.1074 grams and that of O2 is 32 grams.

Answer 1

The balanced chemical reaction is:

2C6H6 + 15O2 = 12CO2 + 6H2O

We are given the amount of benzene to be used in the reaction. We use this as the starting point for the calculations. We do as follows:

10.47 g C6H6 ( 1 mol / 78.1074 ) ( 15 mol O2 / 2 mol C6H6 ) ( 32 g / mol ) = 32.17 g O2