Question

How many hydrogen atoms are in 5.10 mol of ammonium sulfide?

Answer 1

Answer:

2.46 × 10²⁵ atoms H

Explanation:

Avagadro's Number: 6.022 × 10²³

Step 1: Find formulas

Hydrogen - H

Ammonium Sulfide - (NH₄)₂S

Step 2: Use Dimensional Analysis

$5.10 \hspace{3} mol \hspace{3} (NH_4)_2S(\frac{8 \hspace{3} mol \hspace{3} H}{1 \hspace{3} mol \hspace{3} (NH_4)_2S})(\frac{6.02(10)^{23} \hspace{3} atoms \hspace{3} H}{1 \hspace{3} mol \hspace{3} H} )$ =

Step 3: Simplify

We have 3 sig figs.

2.45616 × 10²⁵ atoms H ≈ 2.46 × 10²⁵ atoms H