Question

1) How many atoms are in 0.54 moles of Cu? show work ​

Answer 1

3.3 × 10²³ atoms Cu

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

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

Stoichiometry

• Using Dimensional Analysis

Step-by-step explanation:

Step 1: Define

[Given] 0.54 moles Cu

[Solve] atoms Cu

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

1. [DA] Set up:
   `\displaystyle 0.54 \ mol \ Cu((6.022 \cdot 10^(23) \ atoms \ Cu)/(1 \ mol \ Cu))`
2. [DA] Multiply [Cancel out units]:
   `\displaystyle 3.25188 \cdot 10^(23) \ atoms \ Cu`

Step 4: Check

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

3.25188 × 10²³ atoms Cu ≈ 3.3 × 10²³ atoms Cu