Question

How many atoms are there in 7.80 moles of germanium

Answer 1

Answer:

4.70 × 10²⁴ atoms Ge

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

7.80 mol Ge

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

$\displaystyle 7.80 \ mol \ Ge(\frac{6.022 \cdot 10^{23} \ atoms \ Ge}{1 \ mol \ Ge} )$ = 4.69716 × 10²⁴ atoms Ge

Step 4: Check

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

4.69716 × 10²⁴ atoms Ge ≈ 4.70 × 10²⁴ atoms Ge