How many atoms of Hydrogen are in (NH₄)₂CrO₄?

A. 4

B. 24

C. 8

D. 2

The answer is D. 2.

There are two atoms of hydrogen in (NH₄)₂CrO₄.

Nonsense

The are 4 H atoms in one NH4 molecule
there are 2 NH4 molecules in your equation
so
EIGHT