A tank contains 12.0 g of chlorine gas (Cl2) at a temperature of 81 °C and an absolute pressure of 5.90 × 10^5 Pa. The mass per mole of Cl2 is 70.9 g/mol.
(a) Determine the volume of the tank.
(b) Later, the temperature of the tank has dropped to 29 °C and, due to a leak, the pressure has dropped to 2.60 × 10^5 Pa. How many grams of chlorine gas has leaked out of the tank?