Question

How many moles of methane gas are required to produce 9 moles of water when it combusts in the presence of excess oxygen gas. The other product is carbon dioxide

Answer 1

The answer to your question is 4.5 moles of CH₄ are necessary to produce 9 moles of water.

Step-by-step explanation:

Data

moles of methane = ?

moles of water = 9

moles of oxygen = excess

Balanced chemical reaction

1 CH₄ + 2O₂ ⇒ CO₂ + 2H₂O

Process

1.- Use proportions to find the moles of Methane and consider the coefficients of the balanced chemical reaction.

1 mol of CH₄ -------------------- 2 moles of H₂O

x -------------------- 9 moles of H₂O

x = (9 x 1) / 2

x = 9/2

x = 4.5 moles of CH₄