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6-A 240. mL sample of nitrogen gas is collected at 25.0°C and a pressure of 780...

6-A 240. mL sample of nitrogen gas is collected at 25.0°C and a pressure of 780 torr. What volume will the gas occupy at a pressure of 0.635 atm and 40.9°C?


7-A gas mixture consists of N2, O2, and Ne, where the mole fraction of N2 is 0.50 and the mole fraction of Ne is 0.20 If the mixture is at STP in a 3.0 L container, how many molecules of O2 are present?




8-Calculate the density of Freon-12, CF2Cl2, at 37.0°C and 0.369 atm.

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Answer #1

(6) using ideal gas equation PV = nRT Helle T = 25°C or (25+273) K = 298 K P = 780 tons of or 1.026 atm putting in ideal gas

1•026X 240 = n X0.0820 X 298 = 246.24 – 10.07 moles 24.436 now again the number of moles will remain reine PV=nRT v=nRT = 10:

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