Answers

2016-03-11T20:17:08+05:30
Molecular weight of SO_2 = Molecular weight of S + 2*Molecular weight of O_2

MSO_2 = 32 + 2*16
MSO_2 = 64

By this we understand

64 gm SO_2 = 6.022*10^{23} atoms
Or, 1 gm SO_2 =  \frac{6.022*10^{23}}{64} atoms
Or, 1.28 gm SO_2 =  \frac{6.022*10^{23}}{64}* 1.28 = 1.2044*10^{22} atoms
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