Estimate the total number of air molecules (Inclusive of oxygen,nitrogen,water vapour and other constituents) in a room of capacity `25.0 m^3` at a temperature of `27° C` and `1` atmospheric pressure.

What is the pressure inside the drop of mercury of radius 3.00mm at room temperature?Surface tension of mercury at that temperature (20°C) is 4.65×10^(-1) Nm^(-1) .The atmospheric pressure is 1.01×10^5 Pa .Also give the excess pressure inside the drop.

The total vapour pressure of a 4 mole % solution of NH_(3) in water at 293k is 50.0 torr, the vapour pressure of pure water is 17.0 torr at this temperature. Applying Henry's and Raoult's laws, calculate the total vapour pressure for a 5 mole% solution

What will happen to the volume of a bubble of air found under water in a lake where the temperature is 15°C and the pressure is 1.5 atm, if the bubble then rises to the surface where the temperature is 25^(@)C and pressure is 1 atm