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EXIT Ideal Gas Law & Gas Stoichiometry 1) Work out each problem on scratch paper. 2) Click ANSWER to check your answer. 3) Click NEXT to go on to the next problem. PV = nRT R = 0.0821 L atm/mol K = 8.315 dm 3 kPa/mol K CLICK TO START

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1 2 3 4 5 6 7 8 EXIT How many grams of CO 2 are produced from 75 L of CO at 35°C and 96.2 kPa? 2CO + O 2 2CO 2 ANSWER QUESTION #1

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1 2 3 4 5 6 7 8 EXIT Find the new molar volume: n = 1 mol V = ? P = 96.2 kPa T = 35°C = 308 K R = 8.315 dm 3 kPa/mol K CONTINUE... PV = nRT V = 26.6 dm 3 /mol BACK TO PROBLEM ANSWER #1

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1 2 3 4 5 6 7 8 EXIT NEXTBACK TO PROBLEM ANSWER #1 (con’t) 75 L CO 1 mol CO 26.6 L CO = 120 g CO 2 2 mol CO 2 2 mol CO 44.01 g CO 2 1 mol CO 2 2CO + O 2 2CO 2 75 L? g

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1 2 3 4 5 6 7 8 EXIT How many moles of oxygen will occupy a volume of 2.5 L at 1.2 atm and 25°C? ANSWER QUESTION #2

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1 2 3 4 5 6 7 8 EXIT n = ? V = 2.5 L P = 1.2 atm T = 25°C = 298 K R = 0.0821 L atm/mol K NEXT PV = nRT n = 0.12 mol BACK TO PROBLEM ANSWER #2

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1 2 3 4 5 6 7 8 EXIT What volume will 56.0 grams of nitrogen (N 2 ) occupy at 96.0 kPa and 21°C? ANSWER QUESTION #3

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1 2 3 4 5 6 7 8 EXIT V = ? n = 56.0 g = 2.00 mol P = 96.0 kPa T = 21°C = 294 K R = 8.315 dm 3 kPa/mol K NEXT PV = nRT V = 50.9 dm 3 BACK TO PROBLEM ANSWER #3

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1 2 3 4 5 6 7 8 EXIT What volume of NH 3 at STP is produced if 25.0 g of N 2 is reacted with excess H 2 ? N 2 + 3H 2 2NH 3 ANSWER QUESTION #4

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1 2 3 4 5 6 7 8 EXIT 25.0 g N 2 NEXTBACK TO PROBLEM ANSWER #4 1 mol N 2 28.02 g N 2 = 40.0 L NH 3 N 2 + 3H 2 NH 3 2 mol NH 3 1 mol N 2 22.4 L NH 3 1 mol NH 3 25.0 g? L

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1 2 3 4 5 6 7 8 EXIT What volume of hydrogen is produced from 25.0 g of water at 27°C and 1.16 atm? 2H 2 O 2H 2 + O 2 ANSWER QUESTION #5

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1 2 3 4 5 6 7 8 EXIT Find the new molar volume: n = 1 mol V = ? P = 1.16 atm T = 27°C = 300. K R = 0.0821 L atm/mol K CONTINUE... PV = nRT V = 21.2 L/mol BACK TO PROBLEM ANSWER #5

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1 2 3 4 5 6 7 8 EXIT NEXTBACK TO PROBLEM ANSWER #5 (con’t) 25.0 g H 2 O 1 mol H 2 O 18.02 g H 2 O = 29.4 L H 2 2 mol H 2 2 mol H 2 O 21.2 L H 2 1 mol H 2 2H 2 O 2H 2 + O 2 25.0 g? L

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1 2 3 4 5 6 7 8 EXIT How many atmospheres of pressure will be exerted by 25 g of CO 2 at 25°C and 0.500 L? ANSWER QUESTION #6

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1 2 3 4 5 6 7 8 EXIT P = ? n = 25 g = 0.57 mol T = 25°C = 298 K V = 0.500 L R = 0.0821 L atm/mol K NEXT PV = nRT P = 28 atm BACK TO PROBLEM ANSWER #6

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1 2 3 4 5 6 7 8 EXIT How many grams of CaCO 3 are required to produce 45.0 dm 3 of CO 2 at 25°C and 2.3 atm? CaCO 3 + 2HCl CO 2 + H 2 O + CaCl 2 ANSWER QUESTION #7

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1 2 3 4 5 6 7 8 EXIT Find the new molar volume: n = 1 mol V = ? P = 2.3 atm T = 25°C = 298 K R = 0.0821 L atm/mol K CONTINUE... PV = nRT V = 11 L/mol BACK TO PROBLEM ANSWER #7

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1 2 3 4 5 6 7 8 EXIT NEXTBACK TO PROBLEM ANSWER #7 45.0dm 3 CO 2 1 mol CO 2 11 dm 3 CO 2 = 410 g CaCO 3 CaCO 3 + 2HCl CO 2 + H 2 O + CaCl 2 1 mol CaCO 3 1 mol CO 2 100.09 g CaCO 3 1 mol CaCO 3 ? g45.0 dm 3

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1 2 3 4 5 6 7 8 EXIT Find the number of grams of CO 2 that exert a pressure of 785 torr at 32.5 L and 32°C. ANSWER QUESTION #8

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1 2 3 4 5 6 7 8 EXIT n = ? P = 785 torr = 1.03 atm V = 32.5 L T = 32°C = 305 K R = 0.0821 L atm/mol K NEXT PV = nRT n = 1.34 mol 59.0 g CO 2 BACK TO PROBLEM ANSWER #8

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