at a certain temperature, a certain mass of gas occupies a volume of 5dm3 when the pressure is 540mm of Hg. calculate the pressure in atmosphere when the volume is reduced to 1.5dm3 at the same temperature.

As the given problem is at constant temperature, the Boyle's law is used.P1V1 = P2V2540 × 5 = P2 × 1.5P2 = 540 × 51.5 = 1800 mm of Hg760 mm of Hg = 1 atm1800 mm of Hg = 1760 × 1800 = 2.34 atm

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1800mm of Hg
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