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

0.53 mol NaCl

General Formulas and Concepts:

Chemistry - Atomic Structure

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

Explanation:

Step 1: Define

3.2 × 10²³ atoms NaCl

Step 2: Identify Conversions

Avogadro's number

Step 3: Convert

= 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

With molecular compounds, prefixes are used (mono, di, tri, etc).

Let's break this compound apart (not literally):

dinitrogentrioxide

We know nitrogen is represented as 'N'

We also know that oxygen is represented as 'O'

'Di' means 2, and 'tri' means 3

Let's put everything together now:

N2 (dinitrogen)

O3 (trioxide)

Final N2O3