- First you want to convert the given information to the same measurements. 175 L of liquid nitrogen equals 175000 mL. In order to find the mass you multiply the density of the liquid nitrogen (0.808 g/mL) by the volume of the tank (175000mL) which equates to 141400 g. After vaporization: Plug in the given: density (1.15 g/L) multiplied by the mass (141400g) equals to the volume of 122956 g/L. In order to find the measurement of the room you multiply the three numbers which equals 250 cm3 then multiply it by 1000 L/m to get 250000. Then you take the volume (122956 g/L) and divide it by 250000 to get 0.492 which approximates to 49% is the fraction of the air that is displaced. Seinab commented about 1 year ago

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