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number of molecules is directly proportional to moles
N = kn(moles)
let weight of O2 of M then weigth of N2 is 4M ..
moles of O2 = M/32 (molar mass of O2 is 32)
moles of N2 = 4M/28 (molar mass of N2 is 28)
N02 = k(M/32) ..............1
Nn2 = k(4M/28) .............2
dividing both the equations
No2/Nn2 = 7/32
approve my ans if u like it
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