According to the chemical equation

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

d) how many mol of dioxygen are required to produce with 5.67 x 10^-3 mol CO₂?

Answer

The approach is nearly identical to that used in part a). We must use the stoichiometric ratio between carbon dioxide and dioxygen to answer the question. This ratio is obtained from the balanced chemical equation. According to the balanced chemical equation four mol of carbon dioxide, CO₂, are formed when seven mol of dioxygen react. Carbon dioxide and water always combine in this ratio according to this equation. We can use this relationship as a unit conversion factor to convert between mol of carbon dioxide and mol of dioxygen.