Fewpal
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Which has more number of atoms? 

100g of N2 or 100 g of NH3

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(i) 100 g of N2 = 100 /28 moles 

Number of molecules = 100 28 × 6.022 ×1023 

Number of atoms = (2 ×100 / 28)× 6.022 ×1023  = 43.01×1023 

(ii) 100 g of NH3 = 100 /17 moles = 100 /17 × 6.022×1023 molecules 

=100 /17 × 6.022 ×1023 × 4 atoms 

= 141.69 ×1023 

NH3 would have more atoms

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