Question

If we use 18 moles of H2 how many moles of H2O do we make? Use this chemical equation: 6H2 + O2 → 3H2O

Answer 1

Answer:

9 mol H₂O

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Answer 2

Answer:

9 mol H₂O

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
• Moles
• Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Stoichiometry  

• Using Dimensional Analysis
• Analyzing reactions RxN

Explanation:

Step 1: Define

[RxN - Balanced] 6H₂ + O₂ → 3H₂O

[Given] 18 mol H₂

[Solve] mol H₂O

Step 2: Identify Conversions

[RxN] 6 mol H₂ → 3 mol H₂O

Step 3: Stoich

1. [DA] Set up conversion:                                                                               $\displaystyle 18 \ mol \ H_2(\frac{3 \ mol \ H_2O}{6 \ mol \ H_2})$
2. [DA] Simplify:                                                                                                 $\displaystyle 18 \ mol \ H_2(\frac{1 \ mol \ H_2O}{2 \ mol \ H_2})$
3. [DA] Divide [Cancel out units]:                                                                     $\displaystyle 9 \ mol \ H_2O$