Exam 3 - CHM 2046 Gower/Mitchell Sections Exam 3 (Form Code...

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CHM 2046 Gower/Mitchell Sections Exam 3 (Form Code A) Spring 2010 Instructions: On your scantron sheet enter and bubble in your name , UF ID number (start on the leftmost space and leave any extra spaces blank), and Form Code (see above). Bubbling errors will not be negotiated . Note: A double-arrow symbol used in this exam ( ↔) refers to a reversible reaction. Potentially Useful Information: R = 0.0821 lit•atm/mol•K and 8.314 J/mol•K h = 6.626 x 10 –34 J•s c = 3.00 x 10 8 m/s N A = 6.022 x 10 23 mol –1 1. Which of the following is produced when K 2 O(s) reacts with water? (1) KOH(s) (2) KOH(aq) (3) H 3 O + (aq) (4) H 2 O 2 (g) (5) K(s) 2. Beryllium compounds tend to be covalent rather than ionic. This is because: (1) the second ionization energy of Be is very high, preventing its ionization to Be 2+ (2) Be 2+ is larger than Be (3) Be has a high (very negative) electron affinity (4) the Z eff of Be is too low (5) Be is body-centered-cubic and less dense than other metals 3. Place the following compounds in order of decreasing acidity in aqueous solution: H 2 SO 4 , H 3 PO 4 , HClO 4 , Al 2 O 3 , H 4 SiO 4 (1) H 2 SO 4 > H 3 PO 4 > HClO 4 > H 4 SiO 4 > Al 2 O 3 (2) HClO 4 > H 2 SO 4 > H 3 PO 4 > H 4 SiO 4 > Al 2 O 3 (3) Al 2 O 3 > H 4 SiO 4 > H 3 PO 4 > H 2 SO 4 > HClO 4 (4) HClO 4 > Al 2 O 3 > H 4 SiO 4 > H 3 PO 4 > H 2 SO 4 (5) HClO 4 > H 2 SO 4 > H 4 SiO 4 > H 3 PO 4 > Al 2 O 3 4. Which of the following metals does not react with cold water to form H 2 gas? (1)
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This note was uploaded on 01/25/2011 for the course CHM 2046 taught by Professor Veige/martin during the Fall '07 term at University of Florida.

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Exam 3 - CHM 2046 Gower/Mitchell Sections Exam 3 (Form Code...

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