Question

How many moles are in 8.8 x 1024 atoms of magnesium?

Answer 1

15 mol Mg

Step-by-step explanation:

Step 1: Find conversions

Avagadro's Number: 6.022 × 10²³

Step 2: Use Dimensional Analysis

`8.8(10)^(24) \hspace{3} atoms \hspace{3} Mg(\frac{1 \hspace{3} mol \hspace{3} Mg}{6.022(10)^(23) \hspace{3} atoms \hspace{3} Mg} )` = 14.6179 mol Mg

Step 3: Simplify

We have 2 sig figs.

14.6179 mol Mg ≈ 15 mol Mg