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The ratio between the number of molecules in equal masses of nitrogen and oxygen is

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a
7:8
b
1:9
c
9:1
d
8:7

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detailed solution

Correct option is D

Use the following formula to find the ratio of molecules.

no.of molecules N2no of molecules O2=1/28×NA1/32×NA=3228=87

The ratio between no. of molecules in equal masses of N2:O2 is 8:7 

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