8.6 grams of hexane was burned in oxygen. determine the amount of oxygen consumed.

The equation of the ongoing reaction: 2C6H14 + 19O2 = 12CO2 + 14H2O.
1) Find the molar mass of hexane according to the periodic table: 6 * 12 + 14 * 1 = 72 + 14 = 86.
2) Find the amount of hexane substance. To do this, divide its mass by the molar mass: 8.6 / 86 = 0.1 mol.
3) According to the reaction equation, there are 19 moles of oxygen per 2 mol of hexane. Then the amount of oxygen is equal to: 0.2 / 19 = 0.012 mol.
4) Find the volume of oxygen. To do this, we multiply the amount of oxygen by the molar volume: 0.012 * 22.4 = 0.27 liters – the answer.