Answer:
5.67 × 10²⁴ atoms O
General Formulas and Concepts:
Chemistry - Atomic Structure
- Using Dimensional Analysis
- Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
Explanation:
Step 1: Define
3.14 mol Al₂O₃
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
[tex]3.14 \ mol \ Al_2O_3(\frac{3 \ mol \ O}{1 \ mol \ Al_2O_3} )(\frac{6.022 \cdot 10^{23} \ atoms \ O}{1 \ mol \ O} )[/tex] = 5.67272 × 10²⁴ atoms O
Step 4: Check
We are given 3 sig figs. Follow sig fig rules and round.
5.67272 × 10²⁴ atoms O ≈ 5.67 × 10²⁴ atoms O
