Answer:
0.0451 mol FeCl₂
General Formulas and Concepts:
Chemistry - Atomic Structure
- Reading a Periodic Table
- Using Dimensional Analysis
Explanation:
Step 1: Define
5.72 g FeCl₂
Step 2: Identify Conversions
Molar Mass of Fe - 55.85 g/mol
Molar Mass of Cl - 35.45 g/mol
Molar Mass of FeCl₂ - 55.85 + 2(35.45) = 126.75 g/mol
Step 3: Convert
[tex]5.72 \ g \ FeCl_2(\frac{1 \ mol \ FeCl_2 }{126.75 \ g \ FeCl_2} )[/tex] = 0.045128 mol FeCl₂
Step 4: Check
We are given 3 sig figs. Follow sig fig rules and round.
0.045128 mol FeCl₂ ≈ 0.0451 mol FeCl₂
