1.

A glass tube of volume 112ml. containing a gas is partially evacuated till the pressure in it drops to 3.8 xx 10^(-5) torr at 0^@C. The number of molecules of the gas remaining in the tube is

Answer»

`3 xx 10^17`
`1.5 xx 10^14` 
`4.5 xx 10^18 `
Name of the GAS is REQUIRED 

ANSWER :B


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