Lecture_Notes_092509a

Lecture_Notes_092509a - 3 is heated in a kiln: { CaCO 3 (s)...

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STP and Molar Volume y Standard temperature and pressure, 0 o Cand1atm. y Molar volume – one mole of any gas a STP will occupy 22.4 L
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Gas Density y We can determine the molar mass of a molecule given the density of the gas at a particular temperature and pressure.
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The density of a gaseous compound is 0.915 g/L at 1.3 atm and 300 K. What is the molar mass of this compound? 1. 7 3 2 g/mol 1 . g / m o l /mol 5% 2% 93% 1. 1.732 g/mol 2. 17.32 g/mol 3. 173.2 g/mol R = 0.08206
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Gas Density y A compound has an empirical formula of CHCl. A 256 mL flask at 273 K and 750 torr contains 1.090 g of the compound. What is the molecular formula of the coumpound?
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Chemical Reactions Including Gases y What volume of CO 2 gas at STP is produced when 152 g of CaCO 3 is heated in a kiln: { CaCO 3(s) Æ CO 2 (g) + CaO (s)
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Alternative Solution y What volume of CO 2 gas at STP is produced when 152 g of CaCO
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Unformatted text preview: 3 is heated in a kiln: { CaCO 3 (s) CO 2 (g) + CaO (s) Explosions and Implosions y Kingdome in Seattle N CH 3 N H N H O O O O O O TNT trinitrotoluene Explosives y A hand grenade of about 141 mL contains TNT with d = 1.62 g/mL. What is the pressure buildup at 298 K when TNT decomposes? Partial Pressures y What happens when two ideal gases are mixed in a container? y Daltons Law: The pressure exerted by a gas in a mixture is the same pressure that would have been exerted if the gas were alone in the container. Mole Fractions y The number of moles of a particular gas divided by the total number of moles of gas present Partial Pressures y A gas mixture at 100 o C and 0.8 atm is made of: 50% He and 50% Xe by weight. What are the partial pressures of He and Xe?...
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Lecture_Notes_092509a - 3 is heated in a kiln: { CaCO 3 (s)...

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