Respuesta :

Space

Answer:

0.342 mol Ca

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

Stoichiometry

  • Using Dimensional Analysis

Explanation:

Step 1: Define

13.7 g Ca

Step 2: Identify Conversions

Molar Mass of Ca - 40.08 g/mol

Step 3: Convert

  1. Set up:                               [tex]\displaystyle 13.7 \ g \ Ca(\frac{1 \ mol \ Ca}{40.08 \ g \ Ca})[/tex]
  2. Multiply/Divide:                 [tex]\displaystyle 0.341816 \ mol \ Ca[/tex]

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

0.341816 mol Ca ≈ 0.342 mol Ca

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