Quiz+6-+Answer+Key - Quiz#6 GSI Andrea Geyer Please show...

Info icon This preview shows pages 1–2. Sign up to view the full content.

Quiz #6 Chem 130 Sec 208 GSI: Andrea Geyer Please show all work or no credit will be given Name:______________________ 1) Solid sodium chlorate decomposes to produce solid sodium chloride and oxygen gas according to the equation below. What volume of oxygen gas, measured at 40 ° C and 1.3 atm, will be produced when 13.5 g of sodium chlorate is decomposed? 2NaClO 3(s) 2NaCl (s) + 3O 2(g) 13.5 g NaClO 3 * (1 mol NaClO 3 / 106.436 g NaClO 3 ) * (3 mol O 2 / 2 mol NaClO 3 ) = 0.190 mol O 2 PV = nRT P = 1.3 atm n = 0.190 mol R= 0.08206 atm*L / mol *K T = 273 K + 40 = 313 Thus V = 3.76 L 2) A graduate student was running a reaction composed of 3 different gases each contributing the same volume of gas at 273 K and 1 atm. The three gases were Xe, H 2 , and Ar. Which one of these gases contributes the greatest number of moles to the reaction? All contribute the same number of moles because all contribute that same number of mL at STP and 1 mol = 22.4 L. 3) A little kid is found inhaling helium from a 1.2 L ballon and is feeling light- headed.
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Image of page 2
This is the end of the preview. Sign up to access the rest of the document.
  • Fall '07
  • JadwigaSipowska
  • Chemistry, Chem, mol, Andrea Geyer

{[ 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