Mass relationships in chemical reaction.

Question

For the combustion of methane, beginning with 3.15 mole of CH4.
How many moles of O2 are required to completely consume the CH4?

Answer 1

The balanced chemical equation for the combustion of methane is:

CH4 + 2O2 -> CO2 + 2H2O

From the equation, we can see that each mole of CH4 reacts with 2 moles of O2. Therefore, the number of moles of O2 required to completely consume 3.15 moles of CH4 would be:

3.15 mol CH4 x (2 mol O2/1 mol CH4) = 6.3 mol O2

So, 6.3 moles of O2 are required to completely consume 3.15 moles of CH4 in the combustion reaction.