Respuesta :

Space

Answer:

0.66 mol Ge

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

  • Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Stoichiometry

  • Using Dimensional Analysis

Explanation:

Step 1: Define

4.0 × 10²³ atoms Ge

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

  1. Set up:                    [tex]\displaystyle 4.0 \cdot 10^{23} \ atoms \ Ge(\frac{1 \ mol \ Ge}{6.022 \cdot 10^{23} \ atoms \ Ge})[/tex]
  2. Divide:                    [tex]\displaystyle 0.664321 \ mol \ Ge[/tex]

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

0.664321 mol Ge ≈ 0.66 mol Ge

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