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SHOW WORKING FOR ALL When 0.73 mol of O2 reacts with H2 to form H2O, how many moles of H2 are used up in the process? What is the volume of a 28.0 g sample of propane (C3H8) gas at STP ? What is the volume of 28.0 g of propane at 15°C and 1.2 atm ? 22 g of a gas has a volume of 19.8 L at 15°C. What is the density of the gas ? A sample of nitrogen gas has a volume of 15.6 L at a temperature of 25 °C. Find the new volume, in liters, of the gas if the temperature increases to 74 °C at constant pressure and amount of gas. [3] A sample of H2 gas has a volume of 32.0 L and a pressure of 1 atm. What is the new pressure, in atmospheres, if its volume decreases to 22.0 L with no change in temperature or amount of gas?
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