A sample of carbon dioxide gas occupies a volume of 3.50 l at 125 kpa and 273 K. What pressure in STP units would the gas exert if the volume was decreased to 2.00 liters at 273 K?
P1V1/T1 = P2V2/T2
P1V1T2 = P2V2T1
P2 = P1V1T2 / V2T1
P2 = (3.50 L * 125 kPa * 273 K) / (2.00 L * 273 K) = 218.75 kPa
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