The highest vacuum attained so far is of the order of `10^(-11)` mm of mercury. How many molecules are there in 1 cc of a vessel under such a high vacuum at `0^(@)C` ?

Explanation

`P = nkT implies n = (P)/(kT) = (10^(-11) xx 13.6 xx 1000 xx 9.8)/(1.38 xx 10^(-23) xx 273)`
`= 3.5 xx 10^(14)`