An excess of methane reacts with 8.74 g of oxygen gas, O2 in the following reaction.

CH4(g)+2O2(g)→CO2(g)+2H2O(g)

(a) Calculate the mass of carbon dioxide gas, CO2 produced and
(b) the percentage yield if only 3.6 g of CO2 is actually isolated.

Use the following molar masses in your calculation: CO2 = 44.01 g mol-1; oxygen gas, O2=32.00 g mol-1.