Question

How many moles of iron are in 250 g

Answer 1

4.5 mol Fe

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

• Reading a Periodic Table
• Using Dimensional Analysis

Step-by-step explanation:

Step 1: Define

250 g Fe

Step 2: Identify Conversions

Molar Mass of Fe - 55.85 g/mol

Step 3: Convert

`\displaystyle 250 \ g \ Fe((1 \ mol \ Fe)/(55.85 \ g \ Fe) ) = 4.47628 \ mol \ Fe`

Step 4: Check

Follow sig fig rules and round; given 2 sig figs.

4.47628 mol Fe ≈ 4.5 mol Fe