Answer:
121 mol CH₄
General Formulas and Concepts:
Math
Pre-Algebra
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Chemistry
Organic
- Writing chemical compounds
- Writing organic structures
- Prefixes
- Alkanes, Alkenes, Alkynes
Atomic Structure
- Using Dimensional Analysis
- Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
Explanation:
Step 1: Define
7.31 × 10²⁵ molecules CH₄
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
[tex]\displaystyle 7.31 \cdot 10^{25} \ molecules \ CH_4(\frac{1 \ mol \ CH_4}{6.022 \cdot 10^{23} \ molecules \ CH_4} ) = 121.388 \ mol \ CH_4[/tex]
Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
121.388 mol CH₄ ≈ 121 mol CH₄
