Air is pumped into the tubes of a cycle rickshaw at a pressure of 2atm. The volume of each tube at this pressure is `0.002m^(3). One of the tubes gets punctured and the vloume of the tube reduces to `0.0005m^(3)`.How many moles of air have leaked out? Assume that the temperature remains constant at 300K abd that the air behaves asan ideal gas.