Question

Ammonia is formed from the reaction of nitrogen and hydrogen according to the equation:
N2(g) + 3H2(g) 2NH3(g)
What is the maximum number of moles of ammonia that can be formed from the reaction of 27 moles of hydrogen?
A
41
B
27
18
D
9

Answer 1

Answer:

18 mol NH₃

General Formulas and Concepts:

Chemistry - Stoichiometry

• Using Dimensional Analysis

Explanation:

Step 1: Define

RxN:   N₂ (g) + 3H₂ (g) → 2NH₃ (g)

Given:   27 moles H₂

Step 2: Stoichiometry

$27 \ mol \ H_2(\frac{2 \ mol \ NH_3}{3 \ mol \ H_2} )$ = 18 mol NH₃

Step 3: Check

We are given 2 sig figs.

Since our final answer is in 2 sig figs, we do not need to round.