Respuesta :

Space

Answer:

0.104 mol Br₂

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

6.25 × 10²² molecules Br₂

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

  1. Set up:                              [tex]\displaystyle 6.25 \cdot 10^{22} \ molecules \ Br_2(\frac{1 \ mol \ Br_2}{6.022 \cdot 10^{23} \ molecules \ Br_2})[/tex]
  2. Multiply/Divide:                                                                                               [tex]\displaystyle 0.103786 \ mol \ Br_2[/tex]

Step 4: Check

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

0.103786 mol Br₂ ≈ 0.104 mol Br₂