Help with Chemistry...Please explain answers? - Freemason Hirams Travels Masonic Forums

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03-01-2008, 03:49 PM

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Help with Chemistry...Please explain answers?

1) A 42.3 L volume of methane gas is heated from 25°C to 72°C at constant pressure. What is the final volume of the gas?

2) A sample of nitrogen gas kept in a container of volume 2.2 L and at a temperature of 49°C exerts a pressure of 4.7 atm. Calculate the number of moles of gas present.

3) What volume will 5.0 moles of sulfur hexafluoride (SF6) gas occupy if the temperature and pressure of the gas are 128°C and 9.4 atm?

4) A volume of 0.200 L of a gas at STP weighs 0.400 g. Calculate the molar mass of the gas.

5) A certain anesthetic contains 64.9 percent C, 13.5 percent H, and 21.6 percent O by mass. At 120°C and 750 mmHg, 1.00 L of the gaseous compound weighs 2.30 g. What is the molecular formula of the compound?

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