Question

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Answer 1

Answer:(b) 6.8numberof moles of Nirogen=Mass/Molar Mass(of nitrogen)

Explanation:

we have,

Number of atoms=(Mass/Molar mass)×6.02×10**23

i.e.,(4.095*10**24*14)/6.02*10**23=Mass

We get,

on calculation

,Mass=9.52*10

=95.2

Now,

number of moles of Nitrogen=Mass/Molar mass

=95.2/14=0.6806.8*10**-1

so..6.8approximately..

Hope it helps you a little bit