Question

Which is the correct number of moles of NO that is produced from 13.2 moles of oxygen

gas, O2?
4NH3 + 502 —> 4N0 + 6H2O

Answer 1

10.6 mol NO

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

Stoichiometry

• Using Dimensional Analysis

Step-by-step explanation:

Step 1: Define

[RxN - Balanced] 4NH₃ + 5O₂ → 4NO + 6H₂O

[Given] 13.2 mol O₂

Step 2: Identify Conversions

[RxN] 5 mol O₂ → 4 mol NO

Step 3: Stoich

1. [DA] Set up:
   `\displaystyle 13.2 \ mol \ O_2((4 \ mol \ NO)/(5 \ mol \ O_2))`
2. [DA] Multiply/Divide [Cancel out units]:
   `\displaystyle 10.56 \ mol \ NO`

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

10.56 mol NO ≈ 10.6 mol NO