quizzes/2332375/take O 5.12 mL HBr solution Question 4 8 p A balloon is filled so that its volume is 1165 mL when the pressure is 725 torr and the temperature is 28.5°C. What is the temperature (in °C) if it moves to a new environment where the pressure is 0.845 atm and its volume is 1.24 L? O287 °C .0.374 C 27 °C 0 11°C O 0.284 °C 8p Question 5 A 4.85 g sample of a gas is under 789 mm Hg pressure at 35.4 °C in a 2.125 L vessel. What is the molar mass of the gas?

quizzes/2332375/take O 5.12 mL HBr solution Question 4 8 p A balloon is filled so that its volume is 1165 mL when the pressure is 725 torr and the temperature is 28.5°C. What is the temperature (in °C) if it moves to a new environment where the pressure is 0.845 atm and its volume is 1.24 L? O287 °C .0.374 C 27 °C 0 11°C O 0.284 °C 8p Question 5 A 4.85 g sample of a gas is under 789 mm Hg pressure at 35.4 °C in a 2.125 L vessel. What is the molar mass of the gas?

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter10: Gases And Their Properties

Section10.2: Gas Laws: The Experimental Basis

Problem 10.4CYU: You have a 22-L cylinder of helium at a pressure of 150 atm (above atmospheric pressure) and at 31...

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5.23 A gas bubble forms inside a vat containing a hot liquid. If the bubble is originally at 68°C and a pressure of 1.6 atm with a volume of 5.8 mL, what will its volume be if the pressure drops to 12 atm and the temperature drops to 31°C?
Consider this scenario and answer the following questions: On a mid-August day in the northeastern United States, the following information appeared in the local newspaper: atmospheiic pressure at sea level 29.97 in. Hg, 1013.9 mbar. (a) What was the pressure in kPa? (b) The pressure near the seacoast in the northeastern United States is usually reported near 30.0 in. Hg. During a hurricane, the pressure may fall to near 28.0 in. Hg. Calculate the drop in pressure iii ton.
Consider this question: What is the molecular formula of a compound that contains 39% C. 45% N, and 16% H if 0.157 g of the compound occupies 125 mL with a pressure of 993 kPa at 22 C? (a) Outline the steps necessary to answer the question. (b) Answer the question.
A sealed tank at room temperature, 25C, has 22.0 g of CO2. The gas has a pressure of 732 mm Hg. The tank is moved to a room kept at 12C and an additional 10.0 g of CO2 are added to the tank. What is the pressure in the tank? Assume no loss of gas when more CO2 is added.
You have a 22-L cylinder of helium at a pressure of 150 atm (above atmospheric pressure) and at 31 C. How many balloons can you fill, each with a volume of 5.0 L, on a day when the atmospheric pressure is 755 mm Hg and the temperature is 22 C?
Answer the following questions: (a) Is the pressure of the gas in the hot air balloon shown at the opening of this chapter greater than, less than, or equal to that of the atmosphere outside the balloon? (b) Is the density of the gas in the hot air balloon shown at the opening of this chapter greater than, less than, or equal to that of the atmosphere outside the balloon? (c) At a pressure of 1 atm and a temperature of 20 C, dry air has a density of 1.2256 gt. What is the (average) molar mass of div air? (d) The average temperature of the gas in a hot air balloon is 1.30102 F. Calculate its density, assuming the molar mass equals that of div air. (e) The lifting capacity of a hot air balloon is equal to the difference in the mass of the cool air displaced by the balloon and the mass of the gas in the balloon. What is the difference in the mass of 1.00 L of the cool air in part (c) and the hot air in part (d)? (f) An average balloon has a diameter of 60 feet and a volume of 1.1105ft3. What is the lifting power of such a balloon? If the weight of the balloon and its rigging is 500 pounds, what is its capacity for carrying passengers and cargo? (g) A balloon carries 40.0 gallons of liquid propane (density 0.5005 g/L). What volume of CO2 and H2O gas is produced by the combustion of this propane? (h) A balloon flight can last about 90 minutes. If all of the fuel is burned during this time, what is the approximate rate of heat loss (in kJ/min) from the hot air in the bag during the flight?
5-111 Diving, particularly SCUBA (Self-Contained Underwater Breathing Apparatus) diving, subjects the body to increased pressure. Each 10. m (approximately 33 ft) of water exerts an additional pressure of 1 atm on the body. (a) What is the pressure on the body at a depth of 100. ft? (b) The partial pressure of nitrogen gas in air at 1 atm is 593 mm Hg. Assuming a SCUBA diver breathes compressed air, what is the partial pressure of nitrogen entering the lungs from a breathing tank at a depth of 100. ft? (c) The partial pressure of oxygen gas in the air at 2 atm is 158 mm Hg. What is the partial pressure of oxygen in the air in the lungs at a depth of 100. ft? (d) Why is it absolutely essential to exhale vigorously in a rapid ascent from a depth of 100. ft?
Nitrogen gas can be obtained by decomposing ammonium nitrate at high temperatures. The nitrogen gas is collected over water in a 500-mL (three significant figures) flask at 19C. The ambient pressure is 745 mm Hg. (Vapor pressure of water at 19C is 16.48 mm Hg.) (a) What is the partial pressure of nitrogen? (b) How many moles of water are there in the wet gas? (c) How many moles of dry gas are collected? (d) If 0.128 g of Ne are added to the flask at the same temperature, what is the partial pressure of neon in the flask? (e) What is the total pressure after Ne is added?