Nov 5 extra slides SOLUTIONS

Nov 5 extra slides SOLUTIONS - 3(g at 25 o C R = 0.0821 L...

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Drill Problem: A reaction produced 44.8 mL of methane gas at 35 o C and 751 mm Hg. What volume would the gas occupy at STP? P 1 = 751 mm Hg P 2 = 760 mm Hg V 1 = 44.8 mL V 2 = ? T 1 = 35 o C + 273 = 308 K T 2 = 0 o C = 273 K P 1 V 1 P 2 V 2 V = P V T 2 1 1 2 _________ _________ T 1 T 2 P 2 T 1 751 mm Hg x 44.8 mL x 273 K V 2 = = 39.2 mL 760 mm Hg x 308 K
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Drill Problem: What is the volume of 6.8 g of chlorine at STP? g Cl 2 mol Cl 2 L Cl 2 molar mass = 70.9 g/mol molar volume at STP = 22 .4 L/mol 6.8 g Cl 2 x 1mol x 22.4 L = 2.1 L 70.9 g 1 mol
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Drill Problem: Calculate the pressure inside a 500 mL flask that contains 0.452 g NH
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Unformatted text preview: 3 (g) at 25 o C. R = 0.0821 L atm mol-1 K-1 P = ? T = 25 o C + 273 = 298 K V = 500 mL = 0.500 L n = 0.452 g NH 3 x 1 mol = 0.0266 mol NH 3 17.0 g PV = nRT P = nRT V P = 0.0266 mol x 0.0821 L atm mol-1 K-1 x 298 K 0.500 L P = 1.30 atm Drill Problem: The partial pressure of N 2 on Denali is 288 torr on a day when the atmospheric pressure is 0.480 atm. What is the partial pressure of O 2 ? P N2 = 288 torr P total = 0.480 atm = 365 torr P O2 = ? P total = P 1 + P 2 + P 3 + …. . P O2 = P total – P N2 = 365 – 288 = 77 torr...
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