Question

How many atoms sodium would a 4 mole sample of Na3P have?

400 atoms
O 7.22 x 10^24 atoms
0 2.41 x 10^24 atoms
O 1.99 x 10^-23 atoms
10 ni

Answer 1

2 × 10²⁴ atoms Na₃P

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

4 mol Na₃P

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

`\displaystyle 4 \ mol \ Na_3P((6.022 \cdot 10^(23) \ atoms \ Na_3P)/(1 \ mol \ Na_3P) )` = 2.4088 × 10²⁴ atoms Na₃P

Step 4: Check

We are given 1 sig fig. Follow sig fig rules and round.

2.4088 × 10²⁴ atoms Na₃P ≈ 2 × 10²⁴ atoms Na₃P