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EastWind [94]
3 years ago
5

What is the mass in grams of 2.25 mol of the element iron, Fe?

Chemistry
1 answer:
scZoUnD [109]3 years ago
4 0
<h3>Answer:</h3>

126 g Fe

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Chemistry</u>

<u>Atomic Structure</u>

  • Reading a Periodic Table
  • Using Dimensional Analysis
<h3>Explanation:</h3>

<u>Step 1: Define</u>

2.25 mol Fe

<u>Step 2: Identify Conversions</u>

Molar Mass of Fe - 55.85 g/mol

<u>Step 3: Convert</u>

  1. Set up:                              \displaystyle 2.25 \ mol \ Fe(\frac{55.85 \ g \ Fe}{1 \ mol \ Fe})
  2. Multiply:                            \displaystyle 125.663 \ g \ Fe

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

125.663 g Fe ≈ 126 g Fe

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