Practice Exam 2

Practice Exam 2 - Practice Exam 2 1. Which of the following...

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Practice Exam 2 1. Which of the following is a nonelectrolyte when dissolved in water? a) sodium chloride b) sugar c) copper sulfate d) calcium chloride e) ammonia 2. Which of the following is predicted to be insoluble in water? a) NaBr b) NH 4 Cl c) FeS d) (NH 4 ) 2 S e) K 2 CO 3 3. The oxidation number of sulfur in S 2 O 3 2- is: a) +8 b) +6 c) +4 d) +3 e) +2 4. What volume of 0.150 M NaOH solution is needed to react completely with 3.45 g iodine according to the equation: 3I 2 + 6NaOH à 5NaI + NaIO 3 + H 2 O a) 181 mL b) 45.3 mL c) 4.08 mL d) 2.04 mL e) 1.02 mL 5. What is the total concentration of ions in a 0.0360 M solution of Na 2 CO 3 ? a) 0.0120 M b) 0.0720 M c) 0.900 M d) 0.108 M e) 0.1440 M 6. Consider the thermal energy transfer during a chemical process. When heat is transferred to the system, the process is said to be _______ and the sign of q is ______. a) exothermic, positive b) exothermic, negative c) endothermic, positive d) endothermic, negative e) enthalpic, negative.
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7. Calculate the enthalpy of combustion of C
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Practice Exam 2 - Practice Exam 2 1. Which of the following...

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