Question

How many moles of hydrogen are needed to produce 8 moles of methane CH4? C + H2-> CH4

Answer 1

20 mol H₂

General Formulas and Concepts:

Chem

• Stoichiometry

Step-by-step explanation:

Step 1: Define

RxN: C + H₂ → CH₄

8 moles CH₄

Step 2: Balance RxN

C + 2H₂ → CH₄

Step 3: Stoichiometry

`8 \ mol \ CH_4((2 \ mol \ H_2)/(1 \ mol \ CH_4) )` = 16 mol H₂

Step 4: Check

We are given 1 sig fig. Follow sig fig rules.

16 mol H₂ ≈ 20 mol H₂