{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Quiz 4-solutions - Version 065 Quiz 4 fakhreddine(51615...

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

View Full Document Right Arrow Icon
Version 065 – Quiz 4 – fakhreddine – (51615) 1 This print-out should have 5 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 2.0points Trimethylamine ((CH 3 ) 3 N) can react with water to form (CH 3 ) 3 NH + and a hydroxide ion. Which statement is true for this reac- tion? 1. H 2 O is the conjugate acid of (CH 3 ) 3 N. 2. H 2 O is the conjugate base of (CH 3 ) 3 N. 3. (CH 3 ) 3 NH + is the conjugate acid of (CH 3 ) 3 N. correct 4. The hydroxide ion is the conjugate acid of (CH 3 ) 3 N. 5. (CH 3 ) 3 NH + is the conjugate base of (CH 3 ) 3 N. 6. The hydroxide ion is the conjugate base of (CH 3 ) 3 N. Explanation: 002 2.0points What is [H 3 O + ] when [OH - ] = 3 . 3 × 10 - 9 M? 1. 3 . 0 × 10 - 6 M correct 2. 6 . 6 × 10 - 5 M 3. 1 . 0 × 10 - 7 M 4. 3 . 3 × 10 - 5 M 5. 3 . 3 × 10 - 9 M Explanation: [OH - ] = 3 . 3 × 10 - 9 M K w = [H 3 O + ][OH - ] = 1 × 10 14 [H 3 O + ] = K w [OH - ] = 1 . 0 × 10 14 3 . 3 × 10 - 9 = 3 . 0 × 10 - 6 M 003 2.0points Consider the reaction CO(g) + 2 H 2 (g) CH 3 OH(g) . At room temperature, K is approximately 2 × 10 4 , but at a higher temperature K is substantially smaller. Which of the following is true? 1. The value of K c for this reaction is smaller at all temperatures. 2. The reaction is exothermic. correct 3. The reaction becomes spontaneous at
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