9.DETAILSDaboutthisproblemFOLLOW-UP PROBLEM 5.9Applying Dalton's Law of Partial PressuresTo prevent the presence of air, noble gases are placed over highly reactive chemicals toact as inert "blanketing" gases. A chemical engineer places a mixture of noble gasesconsisting of 5.06 g of He, 15.6 g of Ne, and 36.2 g of Kr in a piston-cylinder assemblyat STP. Calculate the partial pressure of each gas.4.0MHINTSPHe =atmGetting StartedPNe = 4.00PKr = 40atmatm

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Answered: To prevent the presence of air, noble…

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter9: The Gaseous State

Section: Chapter Questions

Problem 29P

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Oxygen Consumption If 5.00 L of hydrogen gas,measured at a temperature of 20.0°C and a pressure of80.1 kPa, is burned in excess oxygen to form water, whatmass of oxygen will be consumed? Assume temperatureand pressure remain constant.
41 A sample of a smokestack emission was collected into 1.25-L tank at Hg and analyzed. The analysis showed 92% CO2, 3.6% NO, 1.2% SO2, and 4.1% H2O by mass. What is the partial pressure exerted by gas?
95 Some engineering designs call for the use of compressed air for underground work. If water containing iron(II) ions is present, oxygen in the compressed air may react according to the following unbalanced net ionic equation: Fe2++H++O2Fe3++H2O (a) Write the balanced net ionic equation. Remember that the amounts of each substance and the charges must balance. (b) Assume all of the oxygen from 650 L of compressed air at 15°C and 6.5 atm is lost by this reaction. What mass of water would be produced? (The mole fraction of oxygen in air is about 0.21.) (c) What will be the final pressure after the loss of the oxygen?
When ammonium nitrate decomposes at 722C, nitrogen, oxygen, and steam are produced. A 25.0-g sample of ammonium nitrate decomposes, and the products are collected at 125C into an evacuated flask with a volume of 15.0 L. (a) Write a balanced equation for the reaction. (b) What is the total pressure in the collecting flask after decomposition is complete?
A weather balloon contains 8.80 moles of helium at a pressure of 0.992 atm and a temperature of 25 C at ground level. What is the volume of the balloon under these conditions?
Tin(IV) chloride is used as an external coating on glass to toughen glass containers. It is prepared by reacting tin with chlorine gas. Sn(s)+2Cl2(g)SnCl4(l)The process requires a 25.0% excess of tin and has a yield of 73.7%. Calculate the mass of tin and the volume of chlorine gas (d=2.898g/Lat 25C, 1 atm) needed to produce 0.500 L of SnCl4(d=2.226g/mL).
Methanol (CH3OH) can be produced by the following reaction: CO(g)+2H2(g)CH3OH(g) Hydrogen at STP flows into a reactor at a rate of 16.0 L/min. Carbon monoxide at STP flows into the reactor at a rate of 25.0 L/min. If 5.30 g methanol is produced per minute, what is the percent yield of the reaction?
Explain why the plot of PV for CO2 differs from that of an ideal gas.
105 The decomposition of mercury(II) thiocyanate produces an odd brown snake-like mass that is so unusual the process was once used in fireworks displays. There are actually several reactions that take place when the solid Hg(SCN)2 is ignited: 2Hg(SCN)2(s)2HgS(s)+CS2(s)+C3N4(s)CS2(s)+3O2(g)CO2(g)+2SO2(g)2C3N4(s)3(CN)2(g)+N2(g)HgS(s)+O2(g)Hg(l)+SO2(g) A 42.4-g sample of Hg(SCN)2 is placed into a 2.4-L vessel at 21°C. The vessel also contains air at a pressure of 758 torr. The container is sealed and the mixture is ignited, causing the reaction sequence above to occur. Once the reaction is complete, the container is cooled back to the original temperature of 21°C. (a) Without doing numerical calculations, predict whether the final pressure in the vessel will be greater than, less than, or equal to the initial pressure. Explain your answer. (b) Calculate the final pressure and compare your result with your prediction. (Assume that the mole fraction of O2 in air is 0.21.)
Liquid oxygen was first prepared by heating potassium chlorate, KClO3, in a closed vessel to obtain oxygen at high pressure. The oxygen was cooled until it liquefied. 2KClO3(s)2KCl(s)+3O2(g) If 171 g of potassium chlorate reacts in a 2.70-L vessel, which was initially evacuated, what pressure of oxygen will be attained when the temperature is finally cooled to 25C? Use the preceding chemical equation and ignore the volume of solid product.
54 One way to generate oxygen is to heat potassium chlorate, KClO3. (The other product is potassium chloride.) If 386 mL of oxygen at 41 C and 97.8 kPa is generated by this reaction, what is the minimum mass of KClO3used?
What volume of oxygen a 423.0 K and a pressure of 127.4 kPa is produced by the decomposition of 129.7 g of BaO2 to BaO and O2?

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