In which case hydrogen atoms are more
1. 2 moles of HCL
2.1 mole of NH3.
Let us calculate number of hydrogen atoms in (i) 2 moles of HCl and (ii) 1 mole of NH3.
(i) 1 mole of HCl = 6.022*1023 molecules of HCl
2 moles of HCl = 2(6.022*1023 molecules of HCl) = 12.044*1023 molecules of HCl
Now 1 molecule of HCl contains = 1 atom of Hydrogen
12.044*1023 molecules of HCl contains = 12.044*1023 atoms of Hydrogen
2 moles of HCl contain = 12.044*1023 atoms of Hydrogen
(ii) 1 mole of NH3 = 6.022*1023 molecules of NH3
Now 1 molecule of NH3 contains = 3 atoms of hydrogen
6.022*1023 molecules of NH3 contains = 3(6.022*1023 atoms of hydrogen)
1 mole of NH3 contains = 18.066*1023 atoms of hydrogen
So by comparison, we find that 1 mole of NH3 contains more number of hydrogen atoms than 2 moles of HCl.