Homework Answers
A sample of gas of mass 1.81g occupies a volume of 629mL at 23°C and 1...
A sample of gas of mass 1.81g occupies a volume of 629mL at 23°C and 1 atm pressure. What is the molar mass of the gas? (R 0.0821 L. atm/mol-K)
A 21.8-L tank of carbon dioxide (CO22) is at a pressure of 9.28 atm and temperature...
A 21.8-L tank of carbon dioxide (CO22) is at a pressure of 9.28 atm and temperature of 19.4∘∘C. (a)Calculate the number of moles of gas in the tank. ______________ mol ( ± 0.02 mol) (b)Obtain the number of grams of carbon dioxide in the tank. Hint: You can obtain the molar mass of CO22 by adding the molar mass of C and twice the molar mass of O. The molar mass of an element is given on the periodic table...
Question 5 (4 points) What is the standard molar heat of solution for solid calcium bromide...
Question 5 (4 points) What is the standard molar heat of solution for solid calcium bromide (CaBr2) given the standard enthalpy of formation data below? CaBrz(s) → Ca2+ (aq) + 2 Br(aq) AHºf of CaBrz(s) is -682.8 kJ.mol-1 AH° of Ca2+(aq) is -542.83 kJ.mol-1 AH, Of Br(aq) is -121.55 kJ mol-1 - 1347.2 kJ.mol-1 -103.1 kJ-mol-1 -21.6 kJ-mol-1 +21.6 kJ-mol-1 Question 6 (4 points) In a 10.0 L vessel at 100.0°C, 10.0 grams of an unknown gas exert a pressure...
Question 6 V.J pus Concept: Gaseous substances are frequently involved in chemical reactions. If the pressure,...
Question 6 V.J pus Concept: Gaseous substances are frequently involved in chemical reactions. If the pressure, volume, and temperature of a gas are known, the ideal gas law can be used to calculate the moles of a gas, making it possible to complete stoichiometry calculations based on the balanced chemical equation. Question: What pressure of O2 is needed at 298 K in a volume of 10.00 L container to completely combust 10.0 grams of C₂H? molar mass of C2H6= 30.08...
Pre-Laboratory Questions and Exercises Due before lab begins. Answer in the space provided 1. a) Determine...
Pre-Laboratory Questions and Exercises Due before lab begins. Answer in the space provided 1. a) Determine the number of moles of krypton gas contained in a 3.25 liter tank at a pressure 5.80 atm and a temperature of 25.5 °C. 12 5.80 An 7=25.59(+2733 299.51 Gas constant, R=0.0821 L. Atm. k mol = 0.769 mol vor of kryptan gas, v= 3.25h b) If the gas was oxygen instead of krypton, will the answer be the same? Why or why not?...
If 3.95 kg of propane gas (C3H8) is stored in a 68.5 L container at 19.1°C,...
If 3.95 kg of propane gas (C3H8) is stored in a 68.5 L container at 19.1°C, what pressure (in atm) will be exerted on the storage tank? Give your answer to the correct number of significant figures and in units of atm. Data: 1 atm = 760 mmHg, 0°C = 273 K, PV = nRT, R = 0.0821 L.atm.mol-1.K-1, Molar mass (g/mol) of C = 12.01 H = 1.008.
If 5.49 kg of propane gas (C3H8) is stored in a 86.8 L container at 15.9oC,...
If 5.49 kg of propane gas (C3H8) is stored in a 86.8 L container at 15.9oC, what pressure (in atm) will be exerted on the storage tank? Give your answer to the correct number of significant figures and in units of atm. Data: 1 atm = 760 mmHg, 0oC = 273 K, PV = nRT, R = 0.0821 L.atm.mol-1.K-1, Molar mass (g/mol) of C = 12.01 H = 1.008.
4.(16pts, min) Do either (a) or (b) (a) How many ml. of 0.0550M COH is needed...
4.(16pts, min) Do either (a) or (b) (a) How many ml. of 0.0550M COH is needed to titrate 16.30 mL of 0.0491 M Diproteid HX. The titration reaction is x + 2 COH - > C X + 2,0 (b) A 0.860 g sample containing Ag was treated Na Sia), to precipitate Ag Sio via - 2 Ag + 8 AS) If the precipitate of Ag S() weighed 0.138 g. what was the % Ag in the sample? Data: Atomic...
5.(16 pts, 8min) Do either (a) or (b) (a) A sample of Ar(g) having a mass of 0.0166 g is collected over water. If t...
5.(16 pts, 8min) Do either (a) or (b) (a) A sample of Ar(g) having a mass of 0.0166 g is collected over water. If the temperature and total pressure of the system are 48.0°C and 676 mmHg respectively, what is the volume of the gas expressed in liters? Data: is 83.71 mmHg. R= 0.0821 L atm/(K mol), 1 atm 760 mmHg Atomic mass of Ar-39.95 and the vapor pressure of water at 48.0°C (b) Consider the following reaction: 2 NAOH(aq)+2...
O GASES Christ Interconverting molar mass and density of ideal gases A sample of an unknown...
O GASES Christ Interconverting molar mass and density of ideal gases A sample of an unknown compound is vaporized at 190. °C. The gas produced has a volume of 2130. mL at a pressure of 1.00 atm, and it weighs 1.80 g. Assuming the gas behaves as an ideal gas under these conditions, calculate the molar mass of the compound. Round your answer to 3 significant digits. mol
A sample of gas of mass 1.81g occupies a volume of 629mL at 23°C and 1 atm pressure. What is the molar mass of the gas? (R 0.0821 L. atm/mol-K)
Question 5 (4 points) What is the standard molar heat of solution for solid calcium bromide (CaBr2) given the standard enthalpy of formation data below? CaBrz(s) → Ca2+ (aq) + 2 Br(aq) AHºf of CaBrz(s) is -682.8 kJ.mol-1 AH° of Ca2+(aq) is -542.83 kJ.mol-1 AH, Of Br(aq) is -121.55 kJ mol-1 - 1347.2 kJ.mol-1 -103.1 kJ-mol-1 -21.6 kJ-mol-1 +21.6 kJ-mol-1 Question 6 (4 points) In a 10.0 L vessel at 100.0°C, 10.0 grams of an unknown gas exert a pressure...
Question 6 V.J pus Concept: Gaseous substances are frequently involved in chemical reactions. If the pressure, volume, and temperature of a gas are known, the ideal gas law can be used to calculate the moles of a gas, making it possible to complete stoichiometry calculations based on the balanced chemical equation. Question: What pressure of O2 is needed at 298 K in a volume of 10.00 L container to completely combust 10.0 grams of C₂H? molar mass of C2H6= 30.08...
Pre-Laboratory Questions and Exercises Due before lab begins. Answer in the space provided 1. a) Determine the number of moles of krypton gas contained in a 3.25 liter tank at a pressure 5.80 atm and a temperature of 25.5 °C. 12 5.80 An 7=25.59(+2733 299.51 Gas constant, R=0.0821 L. Atm. k mol = 0.769 mol vor of kryptan gas, v= 3.25h b) If the gas was oxygen instead of krypton, will the answer be the same? Why or why not?...
If 3.95 kg of propane gas (C3H8) is stored in a 68.5 L container at 19.1°C, what pressure (in atm) will be exerted on the storage tank? Give your answer to the correct number of significant figures and in units of atm. Data: 1 atm = 760 mmHg, 0°C = 273 K, PV = nRT, R = 0.0821 L.atm.mol-1.K-1, Molar mass (g/mol) of C = 12.01 H = 1.008.
4.(16pts, min) Do either (a) or (b) (a) How many ml. of 0.0550M COH is needed to titrate 16.30 mL of 0.0491 M Diproteid HX. The titration reaction is x + 2 COH - > C X + 2,0 (b) A 0.860 g sample containing Ag was treated Na Sia), to precipitate Ag Sio via - 2 Ag + 8 AS) If the precipitate of Ag S() weighed 0.138 g. what was the % Ag in the sample? Data: Atomic...
5.(16 pts, 8min) Do either (a) or (b) (a) A sample of Ar(g) having a mass of 0.0166 g is collected over water. If the temperature and total pressure of the system are 48.0°C and 676 mmHg respectively, what is the volume of the gas expressed in liters? Data: is 83.71 mmHg. R= 0.0821 L atm/(K mol), 1 atm 760 mmHg Atomic mass of Ar-39.95 and the vapor pressure of water at 48.0°C (b) Consider the following reaction: 2 NAOH(aq)+2...
O GASES Christ Interconverting molar mass and density of ideal gases A sample of an unknown compound is vaporized at 190. °C. The gas produced has a volume of 2130. mL at a pressure of 1.00 atm, and it weighs 1.80 g. Assuming the gas behaves as an ideal gas under these conditions, calculate the molar mass of the compound. Round your answer to 3 significant digits. mol
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