URGENT!
You just worked a volume-volume stoichiometry problem to find that 90 L of carbon dioxide gas (CO2) are produced when 30 litres of propane gas (C3H8) react with excess oxygen at STP according to the following chemical equation:

C3H8 (g) + 502(g) —> 4H2O(g) + 3CO2(g)
Does this final answer seem correct? Does it “make sense”?