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` ?

1L of a gas is at a pressure of 10^(-6) mm of Hg at 25^(@)C . How many molecules are present in the vessel.

The lowest pressure attainable using the best available vacuum techniques is about 10^(-12) N//m^(2) . At such a pressure, how many molecules are there per cm^(3) at 0^(@)C ?

How many field lines would emanate from a 1 C positive charge placed in vacuum ?

A sample of ethane has the same mass as 10.0 million molecules of methane. How many C_2H_6 molecules does the sample contain?

In a very good vacuum system in the laboratory, the vacuum attained was 10^-13 atm . If the temperature of the system was 300 K , the number of molecules present in a volume of 1 cm^3 is.

In a very good vacuum system in the laboratory, the vacuum attained was 10^-13 atm . If the temperature of the system was 300 K , the number of molecules present in a volume of 1 cm^3 is.