If 0.50L of gaseous CH4 is burned at STP, what volume of O2 is required for complete combustion?

Question

Methane burns in oxygen to produce CO2 and H2O

CH4(g) + 2O2(g) --> 2H2O(l) + CO2(g)

And what volume of CO2 is produced?

Answer 1

You've worked more difficult problems than this. What's the trouble here?