Acetylene gas is burned in a complete combustion reaction in welding torches:

Acetylene gas is burned in a complete combustion reaction in welding torches: 2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(g)

a) What volume of carbon dioxide gas is produced when 388 mL of acetylene gas undergoes complete combustion? Assume all reactant and product volumes are measured at SATP.

b) What volume of oxygen gas is required to combust completely 370 mL of acetylene gas? Assume all reactant and product volumes are measured at STP.