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QUESTION
Q48) The number of atoms in 4.25g of NH3 i approximately... [ CBSE PMT 1999]




SOLUTION

Molecular weight of N3=17 g
∴ 4.25 g=0.25 mole
Number of molecueles=0.25×6.023×1023
One molecules of NH3 has four atoms
∴ number of atoms=4×0.25×6.023×1023
Answer: (d)