Respuesta :

Space

Answer:

5.58 × 10²⁴ molecules O₂

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

Stoichiometry

  • Using Dimensional Analysis

Explanation:

Step 1: Define

9.27 mol O₂ (Oxygen)

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

  1. Set up:                             [tex]\displaystyle 9.27 \ mol \ O_2(\frac{6.022 \cdot 10^{23} \ molecules \ O_2}{1 \ mol \ O_2})[/tex]
  2. Multiply/Divide:               [tex]\displaystyle 5.58239 \cdot 10^{24} \ molecules \ O_2[/tex]

Step 4: Check

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

5.58239 × 10²⁴ molecules O₂ ≈ 5.58 × 10²⁴ molecules O₂

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