exam2 2000

exam2 2000 - 1 Calculate the molarity of Cl in 245.0 mL of...

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SG 161:E2 V1 1 FALL “00” 1. Calculate the molarity of Cl - in 245.0 mL of a solution containing 23.4 g BaCl 2 . A. 0.112 M B. 0.0275 M C. 0.459 M D 0.553 M E. 2.18 M 2. A system absorbs a given quantity of heat and does a given quantity of work. Which of the following choices correctly indicates the signs for q and w? A. q, w B. -q, -w C. q, -w D. -q, w E. q = w = 0 3. A 1.45 g sample of an iron ore is dissolved in acid and the iron obtained is Fe‚ 2+ (aq). To titrate the solution, 21.6 mL of 0.102 M KMnO“-(aq) is required. What is the percent of iron in the ore? 5 Fe 2+ + MnO 4 - + 8 H + -----> 5 Fe 3 + + Mn 2 + + 4 H 2 O A. 57.6% B. 42.4% C. 84.8% D. 8.6% E. 61.5% 4. Calculate the density of ammonia gas, NH 3 , at 24 ° C and 738 torr. A. 0.677 g L B. 1/48 g L C. 0.836g L D. 514 g L E. 8.38 g L 5. Which of the following is incorrectly labeled? A. KCl - strong electrolyte B. HCl - strong electrolyte C. HCOOH - weak electrolyte D NH 3 - weak electrolyte E. HNO 2 - strong electrolyte
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SG 161:E2 V1 2 FALL “00” 6. Consider four identical 1.0-L flasks containing the following gases each at 0 ° C and 1 atm pressure. Which sample has the most molecules? A. H 2 B. O 2 C. NH 3 D. SO 2 E. Same for all gases 7. Which of the following pairs involve variables that are inversely proportional? A. V, n B. V, T C. P, T D. n, T E. P, n 8. What volume of 0.750 M HCl would be required to neutralize a 1.50 g sample of Ca(OH) 2 ? A.
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This note was uploaded on 04/14/2009 for the course 160 161SG taught by Professor Vasilian during the Spring '09 term at Rutgers.

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exam2 2000 - 1 Calculate the molarity of Cl in 245.0 mL of...

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