The lowest pressure (the best vacuum) that can be created in laboratory at `27^(@)C` is `10^(-11)mm` of Hg. At this pressure,the number of ideal gas molecules per `cm^(3)` will be :

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 ?

If oxygen is present in 1 L flask at a pressure of 7.6xx10^(-10) mm Hg then the number of oxygen molecules in the flask at 0^(@) C will be

What is the volume occupied by 11 g of carbon dioxide at 27^(@)C and 780 mm of Hg pressure ?

Calculate RMS velocity of ethane at 27^@ C and 720 mm of Hg pressure.

Modern vacuum pumps permit to pressures down to p = 4.10^-15 atm to be reached at room temperatures. Assuming that the gas exhausted is nitrogen, find the number of its molecules per 1 cm^3 and the mean distance between them at this pressure.

2 gm of O_(2) at 27^(@)C and 760 mm of Hg pressure has volume "____________" .

Calculate the volume occupied by 7 g of nitrogen gas at 27^(@)C and 750 mm Hg pressure