Question

What volume of air (containing 20% O, by volume) will
be required to burn completely 10 cm3 each of methane
and acetylene.
CH4 + 202 → CO2 + 2H20
2C2H2 +502 + 4CO2 + 2H2O
​

Answer 1

Explanation:

I take gas O2. but in question you mentioned O. IF this is so then multiply final volume by 2 you will get volume of O. i.e nascent oxygen. reply if you are not satisfied.