The volume, V, of a gas varies directly with the temperature, T, and inversely with the pressure, P. If a cylinder of 50 liters contains oxygen at a temperature of 200 K and a pressure of 5 atm, what would the gas pressure be if the volume was changed to 30 liters and the temperature raised to 250 K?

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fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right