Question

A major component of gasoline is octane . When octane is burned in air, it chemically reacts with oxygen gas to produce carbon dioxide and water . What mass of water is produced by the reaction of of octane

Answer 1

162g per mol of octane

Step-by-step explanation:

The combustion reaction of octane is:

2C8H18 + 25O2 ⇒ 16CO2 + 18H2O

That means the reaction produces 18mol of water per 2 mol of octane burned, so if we burn 1 mol of octane we can obtain the mass of water like this:

`1molC8H18x(18molH2O)/(2molC8H18) x(18gH2O)/(1molH2O) = 162g` of water per mol of C8H18 burned