Q7 of 7 Page 43

Which has more number of atoms? 100g of N2 or 100g of NH3 ?

100 g of NH3 has a greater number of atoms.

Explanation: -


Molar mass of N2 = 14 × 2 =28gm


Given the mass of N2 = 100 gm


Number of N2 molecules =



=


=2.15 × 1024


Molar mass of NH3 = 14 +3 = 17gm


Given mass NH3 = 100 gm


Number of NH3 molecules = = 3.54 × 1024


NH3 has number of atoms.


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