Question

2. How many moles are found in 3.2 x 1023 atoms of NaCl?​

Answer 1

0.53 mol NaCl

General Formulas and Concepts:

Chemistry - Atomic Structure

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

Step-by-step explanation:

Step 1: Define

3.2 × 10²³ atoms NaCl

Step 2: Identify Conversions

Avogadro's number

Step 3: Convert

`3.2 \cdot 10^(23) \ atoms \ NaCl((1 \ mol \ NaCl)/(6.022 \cdot 10^(23) \ atoms \ NaCl) )` = 0.531385 mol NaCl

Step 4: Check

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

0.531385 mol NaCl ≈ 0.53 mol NaCl