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.

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