Which example has 1.8*10^24 hydrogen atoms?

1 mole of hydrogen gas (H2)

1 mole of ammonia (NH3)

1 mole of peroxide (H2O2)

1 mole of water (H2O)

NH₃

Explanation:

The given problem will solve by using Avogadro number.

It is the number of atoms, ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 * 10²³ is called Avogadro number.

For example,

one mole of NH₃ have 3 hydrogen atoms. Thus

3 * 6.022 * 10²³ atoms

18.066 * 10²³ atoms

1.8 * 10²⁴ atoms

while all other options are incorrect because all have two hydrogen atoms.

2 * 6.022 * 10²³ atoms

12.044 * 10²³ atoms

1.2 * 10²⁴ atoms