Question

How many hydrogen atoms are in 6.90 mol of ammonium sulfide?

Answer 1

(NH4)2S this is chemcial formula of ammonium sulfide

in 1 mole of ammonium sulfide there are 4*2 = 8 moles of H atoms are present

but in 0.69 moles of ammonium sulfide = 8 * 0.69 = calculate it

Answer 2

Answer : The number of atoms of hydrogen are
`3.32* 10^(25)`

Explanation : Given,

Moles of ammonium sulfide = 6.90 moles

The chemical formula of ammonium sulfide is,
`(NH_4)_2S`

In ammonium sulfide, there are 2 atoms of nitrogen, 8 atoms of hydrogen and 1 atom of sulfur.

As we know that,

1 mole of substance always contains
`6.022* 10^(23)` number of atoms.

As, 1 mole of ammonium sulfide contains
`8* 6.022* 10^(23)` number of hydrogen atoms

So, 6.90 mole of ammonium sulfide contains
`6.90* 8* 6.022* 10^(23)=3.32* 10^(25)` number of hydrogen atoms.

Therefore, the number of atoms of hydrogen are
`3.32* 10^(25)`