Answer : The number of hydrogen atoms present in 4 moles of ammonium sulfide are [tex]1.92704\times 10^{25}[/tex]
Explanation : Given,
Moles of ammonium sulfide = 4.00 mole
The formula of ammonium sulfide is, [tex](NH_4)_2S[/tex]
In the ammonium sulfide, there are 2 atoms of nitrogen, 8 atoms of hydrogen and 1 atom of sulfur.
As, 1 mole of of ammonium sulfide contains [tex]8\times 6.022\times 10^{23}[/tex] number of hydrogen atoms
So, 4 mole of of ammonium sulfide contains [tex]4\times 8\times 6.022\times 10^{23}=1.92704\times 10^{25}[/tex] number of hydrogen atoms
Therefore, the number of hydrogen atoms present in 4 moles of ammonium sulfide are [tex]1.92704\times 10^{25}[/tex]