Question

How many moles of Nitrogen (N2), are
needed to react with 6 moles of Hydrogen
(H2)?
N2 + 3H2 -> 2NH3

Answer 1

Answer:

2 mol N₂

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

1. Brackets
2. Parenthesis
3. Exponents
4. Multiplication
5. Division
6. Addition
7. Subtraction

• Left to Right

Chemistry

Atomic Structure

• Reading a Periodic Table

Stoichiometry

• Using Dimensional Analysis

Explanation:

Step 1: Define

[RxN - Balanced]   N₂ + 3H₂ → 2NH₃

[Given]   6 mol H₂

Step 2: Identify Conversions

[RxN] 3 mol H₂ → 1 mol N₂

Step 3: Stoichiometry

1. Set up:                    $\displaystyle 6 \ mol \ H_2(\frac{1 \ mol \ N_2}{3 \ mol \ H_2})$
2. Divide:                    $\displaystyle 2 \ mol \ N_2$