CHEM 162 Lab #6: Synthesis of Aspirin | 2026/2027 | Complete Questions and verified Answers | Laboratory Report Material

1/ 8 CHEM 162 Lab #6: Synthesis of Aspirin | 2026/2027 | Complete Questions and verified Answers | Laboratory Report Material 2026/2027 | QUESTIONS & CORRECT ANSWERS | 100% VERIFIED STUDY MATERIAL A sample of Argon gas has a volume of 735mL at a pressure of 1.20 atm and temperature of 300K. What is the pressure of the gas if its volume and temperature is changed to 900mL and 200K? C.0.653 In a solution of 5.0g sugar and 100.0g water, water is the: A.solvent Pressure exerted by the vapor when it is in dynamic equilibrium with its liquid is called: vapor pressure A 3.76 g sample of a noble gas is stored in a 2.00 L vessel at 874 torr and 25°C. What is the noble gas? Ar Which of the following substances is not a solution? oxygen The vapor pressure of water at 20.0°C is 17.5 mm Hg . If the pressure of a gas collected over water was measured to be 453.0 mm Hg. What is the pressure of the pure gas? 0.573 atm 2/ 8 The reaction between H2 gas and propene gas to produce propane gas includes a nickel catalyst at 25oC. This is an example of a catalysis heterogeneous A barometer uses mercury because: the density of mercury is very large which allows the barometer to be short A substance that has strong intermolecular forces will probably be at room temperature solid Calculate the molar mass of a gas that effuses at a rate 0.633 times O2 80 How many calories does it take to vaporize 50.0g of benzene at its boiling point? use table 44.2 Voyce text C.4720 cal Pressure exerted on the earth by air particles, describes: atmospheric pressure How many moles of gas were added to a balloon that started with 2.3 moles of gas and a volume of 1.4L given that the final volume was 7.2L? 9.5 The pressure of a gas is 1216 mmHg. What is its pressure in atm? 1.6 atm Increasing the pressure of a gas above a liquid, increases its solublity in the liquid True 3/ 8 115 grams of H2SO4 is dissolved in 500.0mL of water. What is the Normality of the resulting solution? (assume all H+ enter the solution) 4.7 O2 gas at 25oC has pressure of 1.1 atm has density of: 1.4 g/L For the reaction: H3PO4 + NaOH → H2O + Na2HPO4 (balanced?) calculate the equivalent weight of H3PO4. 49 A substance that has weak intermolecular forces will probably be at room temperature gas How many grams of NaCl is needed to prepare 500.0g of a 3.2m solution? 78 How many grams of CaCl2 is needed to prepare 150.0 mL of a 3.2M CaCl2 solution? 53 What is the molar mass of a gas that has a density of 0.179 g/L at STP? 4 500mL of a gas at 25.0oC will have a volume of 1.20L at: 442 oC Comparing a reaction with a catalyst to the same reaction without the catalyst, each of the following statements is true EXCEPT The uncatalyzed reaction has a smaller value for the equilibrium constant. 4/ 8 At 25oC O2(g) has greater solubility in water than at 40oC. True What is the mass percent of an ammonium carbonate solution prepared by dissolving 33.2 g of solid into 39.5 g of water? 45.7% Substance A dissolves in water. Substance A is polar A gas mixture containing oxygen, nitrogen, and neon exerts a total pressure of 600mmHg. If the partial pressure of nitrogen is 210mmHg and partial pressure of neon is 100mmHg, what is the partial pressure of oxygen? 290 Two colliding molecules of HI may not react to form H2 and I2 if the collision has: the wrong orientation The density of C3H8 gas at STP is: 1.96 g/L What is the mass percent of a sodium fluoride solution prepared by dissolving 0.64 moles of sodium fluoride into 63.5 g of water? 29.8% 500mL of a gas having pressure of 700mmHg will have a volume of when it's pressure is 1.1atm. 420mL 550 ml of O2 is collected over water at 1.20 atm and 50oC. Calculate the volume of O2(dry) at STP. 501 mL 5/ 8 Temperature at which vapor pressure of liquid is equal to external pressure, describes: boiling point The density of CO2 gas at STP is: 1.96 g/L A possible rate law for: SO2Cl2 → SO2 + Cl2 is: rate = k[SO2Cl2]X How many grams of NaCl is needed to prepare 500.0g of a 3.2%(w/w) NaCl solution? 16 The numerical value for the gas constant in mmHg, liters, Kelvins, and moles is: 62.36 The pressure of a gas is 1.10 atm. What is its pressure in mmHg? 836 For the reaction: X + Y → Z ; the rate law is: rate = k[X]2[Y]. To double the reaction rate : double the concentration of Y 6.0L of a gas having pressure of 650mmHg will have a volume of when it's pressure is 1.1atm. 4.7L You need to prepare 2.00 L of 0.100 M Na2CO3 solution. The best procedure is to weigh out 21.2 g Na2CO3 and add water until the final solution has a volume of 2.00 L. A 1.0M NaOH solution has Normality of: 1.0 6/ 8 Liquids have definite volume but no definite shape True 250 ml of O2 is collected over water at 1.20 atm and 50oC. Calculate the volume of O2(dry) at STP. 228 mL The rate law for a system is found to be: rate = k[x]2[z]. Calculate the rate constant given: [X] = 0.500, [Z] = 0.300 , rate = 1.2 x 10-5 M/s 1.6 x 10-4 What is the molar mass of 3.93 g of a gas that occupies 2.00L at STP? 44 How many grams of LiF would be present in 575 mL of 0.750 M LiF solution? 11.2 One mole O2(g) at 0oC and 1atm pressure will have a volume of 22.4L True Some elements are more reactive than others True A 1.0g block of CaCO3 will react faster with HCl(aq) than 1.0g powdered CaCO3 False 15.0g of a substance at -60.0oC is heated to 0oC. Calculate the heat, in calories, gained by the substance. (boiling point -50.0oC, freezing point -84oC, heat of fusion 7.7cal/g, heat of vaporization 30.0 cal/g , specific heat(solid) 0.50cal/goC , specific heat (liquid) 0.70cal/goC, specific heat (gas) 0.80cal/goC, you may not need to use all this information) 1155 7/ 8 One mole N2(g) at 0oC and 1atm pressure will have a volume of 44.2L False Two liquids , A and B, are placed in two separate closed containers. When the vapor and liquid have established equilibrium in the containers, the vapor pressure of A is higher than that of B. A is more volatile than B 1/ 1 the solid state is defined as having no definite shape or volume False Why does the rate of the reaction decrease over time? As the reaction proceeds, a decrease in the concentration of reactants results in fewer successful collisions. At STP, 12.69 g of a noble gas occupies 14.09 L. What is the identity of the noble gas? Ne The solubility of a substance in 100.0g water is 15.0g at 25oC. 20.0g of the substance is dissolve in 100.0g of water at 50oC and then cooled to 25oC. If no crystals appear, the solution at 25oC is now: supersaturated The initial volume of a gas cylinder is 750.0 mL. If the pressure of a gas inside the cylinder changes from 840.0 mmHg to 360.0 mmHg, what is the final volume the gas occupies? 1.750 L Calculate the molar mass of a gas that effuses at a rate 0.85 times O2 44