Respuesta :

Space

Answer:

11.3 mol Ba(NO₃)₂

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

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

Explanation:

Step 1: Define

6.80 × 10²⁴ molecules Ba(NO₃)₂

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

  1. Set up:                              [tex]\displaystyle 6.80 \cdot 10^{24} \ molecules \ Ba(NO_3)_2(\frac{1 \ mol \ Ba(NO_3)_2}{6.022 \cdot 10^{23} \ molecules \ Ba(NO_3)_2})[/tex]
  2. Multiply:                                                                                                            [tex]\displaystyle 11.2919 \ mol \ Ba(NO_3)_2[/tex]

Step 4: Check

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

11.2919 mol Ba(NO₃)₂ ≈ 11.3 mol Ba(NO₃)₂

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