Question

What is the number of moles of H2O produced if you combust two moles of CH4 according to the following balanced equation? CH4 + 2 O2 --> CO2 + 2 H2O

Answer 1

The combustion of Methane produces CO₂ and water;

CH₄ + 2 O₂ → CO₂ + 2 H₂O

According to balance equation,

1 Mole of CH₄ on combustion give = 2 Moles of H₂O
So,
2 Moles of CH₄ will produce = X Moles of H₂O

Solving for X,
X = (2 Moles × 2 Moles) ÷ 1 Mole

X = 4 Moles
Result:
4 Moles of H₂O is produced on combustion of 2 Moles of CH₄.