Q.

Which of the following contains greatest number of N atoms?

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a

22.4 L nitrogen gas at STP

b

500 mL of 2.00 M NH3

c

1.00 mol of NH4CI

d

6.02×1023 molecules of NO2

answer is A.

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Detailed Solution

22.4 L of N2  contains 2NA  ‘N’ atoms where as in remaining cases 1NA ‘N’ atoms present.
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