{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Scan_Doc0137 - Exercises 229 85 The partial pressure of...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
85. The partial pressure ofCH 4 (g) is0.175 atm and that of 02(g) is 0.250 atm inamixture ofthetwo gases. a. What isthemole fraction ofeach gas inthemixture? b. If the mixture occupies avolume of 10.5 L at 65 D C, calcu- late thetotal number ofmoles ofgas inthemixture. c. Calculate the number of grams of each gas in the mixture. 86. A1.00-L gassample at100.DCand600. torrcontains 50.0% he- lium and 50.0% xenon by mass. What are thepartial pressures oftheindividual gases? 87. Small quantities ofhydrogen gas can beprepared inthe labora- torybytheaddition ofaqueous hydrochloric acidtometallic zinc. Zn(s) + 2HCI(aq) ----7 ZnCI 2 (aq) + HzCg) Typically, thehydrogen gasisbubbled through water forcollec- tion andbecomes saturated with water vapor. Suppose 240. mL ofhydrogen gas iscollected at 30. D C andhas atotal pressure of 1.032 atmbythisprocess. What isthepartial pressure ofhydro- gen gas inthe sample? How many grams ofzinc must have re- acted toproduce this quantity ofhydrogen? (The vapor pressure ofwater is32torr at 30 D C.) 88. Helium iscollected over water at 25 D C and 1.00atm total pres- sure.What totalvolume ofgasmustbecollected toobtain 0.586g helium? (At 25 D C the vapor pressure ofwater is23.8 torr.) 89. At elevated temperatures, sodium chlorate decomposes to pro- duce sodium chloride andoxygen gas.A0.8765-g sample ofim-
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern