Practice_Exam_for_Exam1_CHE116

Practice_Exam_for_Exam1_CHE116 - CHE 116 Section M009...

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CHE 116 Section M009, Exam #1, EXAM VERSION A Choose the one alternative that best completes the statement or answers the question. 1) The expression for K p for the reaction below is __________. 4CuO (s) + CH 4 (g) CO 2 (g) + 4Cu (s) + 2H 2 O (g) A) P CO 2 P H 2 O 2 P CuO B) P CO 2 P H 2 O 2 P CH 4 C) P CH 4 P CO 2 P H 2 2 D) P CH 4 P H 2 O 2 P CO 2 E) [Cu] P CO 2 P H 2 O 2 [CuO] 4 P CH 4 2) Which one of the following is the weakest acid? A) HClO (K a = 3.0 × 10 - 8 ) B) HF (K a = 6.8 × 10 - 4 ) C) HNO 2 (K a = 4.5 × 10 - 4 ) D) HCN (K a = 4.9 × 10 - 10 ) E) Acetic acid (K a = 1.8 × 10 - 5 ) 3) In basic solution, __________. A) [H 3 O + ] = 0 M B) [H 3 O + ] > [OH - ] C) [OH - ] > 7.00 D) [H 3 O + ] < [OH - ] E) [H 3 O + ] = [OH - ] 1
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4) Which of the following expressions is the correct equilibrium - constant expression for the equilibrium between dinitrogen tetroxide and nitrogen dioxide? N 2 O 4 (g) 2NO 2 (g) A) [NO 2 ] 2 [N 2 O 4 ] B) [NO 2 ] 2 [N 2 O 4 ] C) [NO 2 ][N 2 O 4 ] D) [NO 2 ] [N 2 O 4 ] E) [NO 2 ] [N 2 O 4 ] 2 5) What is the pH of an aqueous solution at 25.0 °C in which [H + ] is 0.0025 M? A) 2.25 B) - 2.60 C) 2.60 D) - 3.40 E) 3.40 6) The molar concentration of hydronium ion in pure water at 25°C is __________. A) 1.0 × 10 - 7 B) 7.00 C) 1.0 × 10 - 14 D) 1.00 E) 0.00 2
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Acid K a HOAc 1.8 × 10 - 5 HCHO 2 1.8 × 10 - 4 HClO 3.0 × 10 - 8 HF 6.8 × 10 - 4 A) CHO 2 - B) F - C) OAc - D) ClO - E) OAc - and CHO 2 - 8) The following reaction is second order in [A] and the rate constant is 0.039 M - 1 s - 1 : A B The concentration of A was 0.30 M at 23 s. The initial concentration of A was __________ M. A) 1.2
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This note was uploaded on 02/15/2011 for the course CHE 116 taught by Professor Staff during the Spring '08 term at Syracuse.

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Practice_Exam_for_Exam1_CHE116 - CHE 116 Section M009...

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