Respuesta :

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Answer:

15.0 mol H₂O

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

Explanation:

Step 1: Define

9.03 × 10²⁴ molecules H₂O

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

  1. Set up:                               [tex]\displaystyle 9.03 \cdot 10^{24} \ molecules \ H_2O(\frac{1 \ mol \ H_2O}{6.022 \cdot 10^{23} \ molecules \ H_2O})[/tex]
  2. Multiply/Divide:                                                                                             [tex]14.995 \ mol \ H_2O[/tex]

Step 4: Check

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

14.995 mol H₂O ≈ 15.0 mol H₂O

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