The density of methane at 2.0 atmosphere pressure and 27°C is

A spherical balloon of 21 cm diameter is to be filled up with hydrogen at 0oC and 1 atm from a cylinder containing the gas at 20 atmosphere at 27oC. If the cylinder can hold 2.82 litre of water at 0oC and 1 atm, calculate the number of balloon that can be filled up.

When 3.2 g of sulphur is vapourised at 450°C and 723 mm pressure, the vapours occupy a volume of 780 ml. What is the molecular formula of sulphur vapours under these conditions?

An open vessel at 27oC is heated at constant pressure until 3/5th of the air in it has been expelled. Find (a) the temperature at which vessel was heated ? (b) the moles of air eascaped out, if vessel were heated to 900 K ? (c) temperature at which half of the air escapes out ?

In a barometeric tube Hg is replaced by H2O then find the height of H2O column to measure the atmospheric pressure.Assume that vapour pressure of H2O in negligible.