A container with a volume of `20.0 L` holds `N_(2)(g)` and `H_(2)O(l)` at `300 K` and 1.0 atm. The liquid water is then decomposed completely into `H_(2)(g)` and `O_(2)(g)` by any means, at constant temperature. If the final pressure becomes 1.86 atm, what was the mass of water (in gm) present initially. Neglect the initial volume of water. [Given : Vapour pressure of water at 300 K = 0.04 atm, R = 0.08 L-atm/K-mol]

Answer

`0009`