According to the chemical equation

2C₂H_6(g) + 7O_2(g) ---> 4CO_2(s) + 6H₂O_(g)

a) how many mol of carbon dioxide will form by the complete combustion of 6.6 mol of C₂H₆?

Answer

According to the balanced chemical equation four mol of carbon dioxide are formed when two mol of ethane, C₂H₆, react. Carbon dioxide and ethane always combine in this ratio according to this equation. We can use this relationship as a unit conversion factor to convert between mol of ethane and mol of carbon dioxide.