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A gas at 300 K has pressure 4 xx 10^(-10...

A gas at 300 K has pressure `4 xx 10^(-10) N//m^(2)`. IF `k = 1.38 xx 10^(-23) J//K`, the number of `"molecule"// cm^(3)` is of the order of

A

100

B

`10^(5)`

C

`10^(8)`

D

`10^(11)`

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  • The number of gas molecules striking per second per square meter of the top surface of a table placed in a room at 20^(@)C and 1 atmospheric pressure is of the order of (k_(B) = 1.4 xx10^(-23) J/K, and the average mass of an air molecules is 5xx10^(-27) kg)

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    D
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