The mass of a litre of a gas is 1.562 g at `0^(@)C` under a pressure of 76 cm of mercury. The temperature is increased to `250^(@)C` and the pressure to 78 cm of mercury. What is the mass of one litre of the gas under new conditions ?

Explanation

`P_(1)/(rho_(1)T_(1))=P_(2)/(rho_(2)T_(2))`
(or) `rho_(2)=(P_(2)T_(1)rho_(1))/(P_(1)T_(2))=(78xx273xx1.562)/(76xx523)=0.8366g//lit`
`therefore` Mass of 1 litre of the gas under new conditions is 0.8366 g.