Question

Study the reaction.CH4 + 2O2 → CO2 + 2H2OIf 4.0 moles of methane (CH4) and 8.0 moles of oxygen (O2) enter this reaction, how many moles of carbon dioxide (CO2) and water (H2O) will be created at the end of the reaction?

Answer 1

4 moles of CO₂ and 8 moles of H₂O. Option A is correct

Explanations;

Given the chemical reaction shown below;

`CH_4+2O_2\rightarrow CO_2+2H_2O`

Since 4.0 moles of methane (CH₄) and 8.0 moles of oxygen (O₂) enter this reaction, methane will act as the limiting reactant.

According to stochiometry, 1 mole of methane produces 1 mole of CO₂, hence the moles of CO₂ created at the end of the reaction will also be 4 moles

Also, since 1 mole of methane produces 2 moles of water, the moles of H₂O created at the end of the reaction will be 2(4) = 8 moles.