Respuesta :
First identify the molecular formula of ammonium sulphide to determine the number of hydrogen atoms present the molecule.
ammonium sulphide = [tex](NH_{4})_{2}S[/tex]
According to molecular formula, there are eight hydrogen atoms present in the molecule.
Thus, moles of hydrogen atom is calculated by the multiplication of number of hydrogen atoms and moles of ammonium sulphide.
Number of moles of hydrogen atom = [tex]8\times 6.20 mol[/tex]
= 49.6 moles
Now, 1 mole of atom = Avogadro number ([tex]6.023\times 10^{23}[/tex])
Number of hydrogen atoms =[tex]moles of hydrogen atom \times Avogadro number[/tex]
= [tex]49.6 moles\times 6.023\times 10^{23} [/tex]
= [tex]298.74\times 10^{23}[/tex]
= [tex]2.9874\times 10^{25}[/tex] [tex]\simeq 3\times 10^{25}[/tex] atoms of hydrogen
Hence, [tex]3\times 10^{25}[/tex] is the number of hydrogen atoms.
