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53. Which of the following is an acid-base reaction? Select thebest answer.

   (A). C(s) + O2(g)  CO2(g)

   (B). 2HClO4(aq) + Ca(OH)2(aq) 2H2O(l) +Ca(ClO4)2(aq)

   (C). Fe(s) + 2AgNO3(aq)  2Ag(s) + Fe(NO3)2(aq)

   (D). MgSO4(aq) + Ba(NO3)2(aq)  Mg(NO3)2(aq) +BaSO4(s)

   (E). All of the above are acid base reactions.

54. Give the net ionic equation for the reaction (if any) thatoccurs when aqueous solutions of K2S and Fe(NO3)2 are mixed.

   (A). Fe2+(aq) + S2-(aq)  FeS(s)

   (B). Fe2+(aq) + S2-(aq) + 2K+(aq) + 2NO3-(aq) FeS(s) + 2K+(aq) + 2NO3-(aq)

   (C). K+(aq) + NO3-(aq)  KNO3(s)

   (D). Fe2+(aq) + S2-(aq) + 2K+(aq) + 2NO3-(aq) Fe2+(aq) + S2-(aq) + 2KNO3(s)

55. According to the following reaction, what mass of PbCl2 canform from 422 mL of 0.110M KCl solution? Assume that thereis excess Pb(NO3)2.

2KCl(aq) + Pb(NO3)2(aq)  PbCl2(s) + 2KNO3(aq) (balanced ?)

   (A). 7.19 g

   (B). 3.59 g

   (C). 6.45 g

   (D). 5.94 g

   (E). 1.30 g

56. When 10.00 moles of H2(g) react with 5.000 moles of O2(g) toform 10.00 moles of H2O(l) at 25°C and a constant pressure of 1.00atm. If 683.0 kJ of heat are released during this reaction, and PΔVis equal to -37.00 kJ, then

   (A). ΔH° = -683.0 kJ and ΔE° = -646.0 kJ.

   (B). ΔH° = -683.0 kJ and ΔE° = -720.0 kJ.

   (C). ΔH° = +683.0 kJ and ΔE° = +720.0 kJ.

   (D). ΔH° = +683.0 kJ and ΔE° = +646.0 kJ.

57. Determine the molarity of a solution formed by dissolving97.7 g LiBr in enough water to yield 750.0 mL of solution.

   (A). 0.130 M

   (B). 0.768 M

   (C). 2.30 M

   (D). 1.50 M

   (E). 1.18 M

59. Which one of the following compounds is(/are)soluble in water? Select all that apply.

   (A). Ca3(PO4)2

   (B). HgS

   (C). Ni(NO3)2

   (D). MgCO3