1.

Calculate the number of molecules in 11.2 litres of SO_(2)gas at NTP.

Answer»

Solution :No. Of MOLES of `SO_(2)=("vol. Of NTP (LITRES)")/("std. Molar VOLUME (litres)")`
`=(11.2)/(22.4) = 0.5`
No. Of molecules of `SO_(2)`= no. Of moles `XX` Av. CONST
`=0.5 xx 6.022 xx 10^(23)`
`=3.011 xx 10^(23)`


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