Answer:
1.5 × 10²³ atoms Mn
General Formulas and Concepts:
Math
Pre-Algebra
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Chemistry
Atomic Structure
- Using Dimensional Analysis
- Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
Explanation:
Step 1: Define
0.25 mol Mn
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
- Set up: [tex]\displaystyle 0.25 \ mol \ Mn(\frac{6.022 \cdot 10^{23} \ atoms \ Mn}{1 \ mol \ Mn})[/tex]
- Multiply: [tex]\displaystyle 1.5055 \cdot 10^{23} \ atoms \ Mn[/tex]
Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
1.5055 × 10²³ atoms Mn ≈ 1.5 × 10²³ atoms Mn
