Mass relationships in chemical reaction:
1. For the combustion of methane, beginning with 3.15 mole of CH4 How many moles of O2 are required to completely consume the CH4?
The balanced chemical equation for the combustion of methane is:
CH4 + 2O2 → CO2 + 2H2O
This equation tells us that for every 1 mole of CH4, we need 2 moles of O2. Therefore, for 3.15 moles of CH4, we will need:
3.15 mol CH4 x (2 mol O2/1 mol CH4) = 6.30 mol O2
So, 6.30 moles of O2 are required to completely consume 3.15 moles of CH4.