What V CO2 will be released when burning 15g. C2H6?

Ethane combustion reaction: 2C2H6 + 7O2 = 4CO2 + 6H2O.
1) According to the periodic table, we find the molar mass of ethane: 12 * 2 + 6 * 1 = 30.
2) We calculate the amount of ethane substance. For this, the mass of ethane given in the problem is divided by the molar mass of ethane: 15/30 = 0.5 mol.
3) According to the reaction equation, there are four moles of carbon dioxide for two moles of ethane. This means that the amount of carbon dioxide substance is: 2 * 0.5 / 4 = 0.25 mol.
4) Find the volume of carbon dioxide. To do this, we multiply the amount of carbon dioxide by the molar volume: 0.25 * 22.4 = 5.6 liters – the answer.