Question

How many moles are in 3.48 x 1024 particles of lithium ?

Answer 1

5.78 mol Li

Step-by-step explanation:

Step 1: Define

Avagadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Step 2: Use Dimensional Analysis

`3.48(10)^(24) \hspace{3} particles \hspace{3} Li(\frac{1 \hspace{3} mol \hspace{3} Li}{6.02(10)^(23) \hspace{3} particles \hspace{3} Li} )` = 5.78073 mol Li

Step 3: Simplify

We have 3 sig figs.

5.78073 mol Li ≈ 5.78 mol Li