“What mass of carbon dioxide (CO2) is produced when 32.1g of methane (CH4) reacts with oxygen (O2)?”

Question

I’d like to know the exact steps it takes to understand the question? I feel like I am forgetting a formula that’d make this very simple. Any help is appreciated.

Answer 1

CH4 + O2 ---------> CO2 + H2O

CH4 + 2O2 ---------> CO2 + 2H2O

32.1g*(1 mole/16.04 g)=moles of CH4

moles of CH4=moles of CO2

moles of CO2" (44.01g/mole)=??? <=== 3 sig figs.