Midterm II KEY Au10

Midterm II KEY Au10 - 1 Which of these bonds is the most...

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1 . Which of these bonds is the most polar? a) C – N b) Br – Cl c) F - F d) O – O e) O - C 2. SCl 2 , a cherry-red liquid, is the simplest sulfur chloride and one of the most common. Draw the Lewis structure for SCl 2 and apply the VSEPR theory to determine which of the following statements is correct for this molecule. 4 VSEPR groups bent geometry a) There is one pair of nonbonding electrons on the central atom. b) The molecule has a bond angle of about 109.5 o . c) The molecule is linear. d) The molecule has one double bond. e) There are several resonance structures for this molecule. 3. Draw the Lewis structure for NCl 3 and apply the VSEPR theory to determine which of the following statements is correct for this molecule. .. 4 VSEPR groups There are 3 lone pairs on each Cl atom, which are not shown here. a) The molecule has a trigonal pyramidal geometry. b) The molecule is nonpolar c) The molecule has identical bond angles of 120 o . d) There are several resonance structures for this molecule. e) The central atom contains no lone pairs of electrons. 4. Draw the Lewis structure for CCl 4 and apply the VSEPR theory to determine which of the following statements is correct for this molecule. The molecule has 4 polar bonds but due to tetrahedral geometry, the polarities all cancel. a) The molecule has a trigonal pyramidal geometry. b) The molecule is nonpolar c) The molecule has identical bond angles of 120 o . d) There are several resonance structures for this molecule. e) The molecule is polar 1
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5. Balance the following equation. What is the sum of the coefficients of the reactants and products? 2 Ag 2 CO 3 (s) 4 Ag(s) + _ 1 __ O 2 (g) + 2 CO 2 (g) a) 7 b) 8 c) 9 d) 10 e) 12 6. Which of the following equations represents an acid-base neutralization reaction ? a) H 2 SO 4 + Zn ZnSO 4 + H 2 b) Ba(OH) 2 + Na 2 SO 4 BaSO 4 + 2NaOH c) HCl + AgNO 3 HNO 3 + AgCl d) HNO 3 + KOH KNO 3 + H 2 O acid + base salt + water e) WO 3 + 3 H 2 W + 3 H 2 O 7. What is the oxidation number for chlorine in HClO 3 ? +1 + Cl + 3(-2) = 0 Cl = +5 a) -1 b) -7 c) +1 d) +5 e) +7 8. Identify the oxidizing agent in the following oxidation-reduction reaction. +2 -2
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Midterm II KEY Au10 - 1 Which of these bonds is the most...

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