How to Calculate Moles from Atoms in Chemistry

How many moles are in 4.28 x 10^23 atoms of carbon?

Answer: 0.711 moles C

Answer:

To calculate the number of moles from atoms in chemistry, you can use the concept of Avogadro's Number, which is 6.022 × 10²³ atoms. Here is the step-by-step guide:

Explanation:

Step 1: Define

[Given] 4.28 × 10²³ atoms C

[Solve] moles C

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

[DA] Set up: 4.28 × 10²³ atoms C x (1 mol C / 6.022 × 10²³ atoms C)

[DA] Divide [Cancel out units]: 0.710727 moles C

Step 4: Check

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

0.710727 moles C ≈ 0.711 moles C