{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

key2 - CHEM 1211K Test II MULTIPLE CHOICE(3 points each...

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

View Full Document Right Arrow Icon
CHEM 1211K Test II MULTIPLE CHOICE. (3 points each, place answer on the answer sheet) 1) The formula weight of ammonium sulfate ((NH 4 ) 2 SO 4 ) is __________ amu. A) 100 B) 118 C) 116 D) 132 2) Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO (s) + H 2 O(l) Æ Ca(OH) 2 (s) In a particular experiment, a 0.0892mol sample of CaO is reacted with excess water and 0.0825mol of Ca(OH) 2 is recovered. What is the percent yield in this experiment? A) 122 B) 1.22 C) 7.19 D) 92.4 3) The combustion of ammonia in the presence of excess oxygen yields NO 2 and H 2 O: 4 NH 3 (g) + 7 O 2 Æ 4 NO 2 (g) + 6 H 2 O(g) The combustion of 1.69mol of ammonia consumes __________ mol of oxygen. 4) The combustion of propane (C 3 H 8 ) in the presence of excess oxygen yields CO 2 and H 2 O: C 3 H 8 (g) + 5O 2 (g) Æ 3CO 2 (g) + 4H 2 O(g) When 2.5 mol of O 2 are consumed in their reaction, __________ mol of CO 2 are produced. 5) Water can be formed from the stoichiometric reaction of hydrogen with oxygen: 2H 2 (g) + O 2 (g) Æ 2H 2 O(g) A complete reaction of 5.0 g of O 2 with excess hydrogen produces __________ g of H 2 O.
Image of page 1

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

View Full Document Right Arrow Icon
Image of page 2
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