According to the chemical equation

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

b) how many mol of carbon dioxide will form by the complete combustion of 0.410 mol of C₂H₆?

Answer

The approach is identical to that used in part a). We must use the stoichiometric ratio between carbon dioxide and ethane to answer the question. This ratio is obtained from the balanced chemical equation. 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.