1.

Number of atoms present in 224 `dm^(3)` of oxygen gas at STP is :-A. `6.0xx10^(23)`B. `1.2xx10^(23)`C. `6.0xx10^(24)`D. `1.2xx10^(25)`

Answer» Correct Answer - D
Moles of `_(2)` at STP `=(224)/(22.4)=10`
No on atoms `=10xx2xx6.02xx10^(23)`
`=1.2xx10^(25)` atom


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