The density of a gas at 27oC and 1 atm is d. Pressure remaining constant at which of the following temperatures will its density become 0.75 d?

where n= >> >> PV nRT n w V RT P M w V RT PM Rearranging the equation, we have PM= Mass (w) where d, density= (V) w RT V PM dRT Volume 1 1 PM d RT 2 2 1 1 2 2 2 2 (300)( ) (0.75 ) 400 PM d RT d T d T d d T T K