# How many moles of methane do I need to react with 1 mol of oxygen in a complete combustion reaction?

Apr 8, 2017

You need 0.5 mol of methane.

#### Explanation:

First, write the balanced chemical equation for the reaction.

$\text{CH"_4 + "2O"_2 → "CO"_2 + "2H"_2"O}$

The equation tells you that 2 mol of oxygen react with 1 mol of methane.

${\text{Moles of CH"_4 = 1 color(red)(cancel(color(black)("mol O"_2))) × "1 mol CH"_4/(2 color(red)(cancel(color(black)("mol O"_2)))) = "0.5 mol CH}}_{4}$