1.

An electronic vacuum tube wassealed off during an experiment at a pressure of 8.2xx10^(-10) atm at 27^(@)C The volume of the tube was 30dm^(3). The number of gas molecules remaining in the tube are

Answer»

`6.02xx10^(14)`
`49.4xx10^(23)`
`24.6xx10^(6)`
`8.2xx30xx6.02xx10^(23)`

Solution :`PV=nRT,n=(PV)/(RT)=(8.2xx10^(-10)xx30)/(0.082xx300)`
`=10^(-9)` mol`=6.02xx10^(14)` MOLECULES


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