Question

Given the following unbalanced equation:

____Mg + ____O2→ ____ MgO

If you have 8.01 moles of Mg, how many moles of MgO can you make?

Answer 1

Answer:

8.01 mol MgO

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

• Moles
• Compounds

Stoichiometry

• Using Dimensional Analysis
• Analyzing Reactions RxN

Explanation:

Step 1: Define

[RxN - Unbalanced] Mg + O₂ → MgO

[RxN - Balanced] 2Mg + O₂ → 2MgO

[Given] 8.01 moles Mg

[Solve] moles MgO

Step 2: Identify Conversions

[RxN] 2 mol Mg → 2 mol MgO

Step 3: Stoich

1. [DA] Set up:                                                                                                       $\displaystyle 8.01 \ mol \ Mg(\frac{2 \ mol \ MgO}{2 \ mol \ Mg})$
2. [DA] Multiply/Divide [Cancel out units]:                                                          $\displaystyle 8.01 \ mol \ MgO$