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Final.FormB.Answers.F07

Final.FormB.Answers.F07 - 1 Final.FormB.Answers.F07...

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1 Final.FormB.Answers.F07 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. The following problems (1-39) are worth 3 points each. 1) What is the concentration of nitrate ions in a 0.125 M Ba(NO 3 ) 2 solution? A) 0.125 M B) 0.250 M C) 0.375 M D) 0.0625 M E) 0.160 M 2) Which of the following is considered a STRONG electrolyte? 3) According to the following reaction, how many moles of Fe(OH) 2 can form from 175.0 mL of 0.227 M NaOH solution? Assume that there is excess FeCl 2 . FeCl 2 (aq) + 2 NaOH(aq) Fe(OH) 2 (s) + 2 NaCl(aq) 4) Which of the following compounds is insoluble in water? 5) Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of K 2 S and Fe(NO 3 ) 2 are mixed. A) Fe 2+ (aq) + S 2- (aq) FeS(s) B) K + (aq) + NO 3 -(aq) KNO 3 (s) C) Fe 2+ (aq) + S 2- (aq) + 2 K + (aq) + 2 NO 3 - (aq) FeS(s) + 2 K + (aq) + 2 NO 3 - (aq) D) Fe 2+ (aq) + S 2- (aq) + 2 K + (aq) + 2 NO 3 - (aq) Fe 2+ (aq) + S 2- (aq) + 2 KNO 3 (s) E) No reaction occurs.
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2 6) Which of the following statements about isotopes is TRUE? 7) Determine the name for P 4 O 10 . 8) According to the following balanced reaction, how many moles of KO 2 are required to exactly react with 5.44 moles of H 2 O? 4 KO 2 (s) + 2 H 2 O(l) 4 KOH(s) + 3O 2 (g) 9) Determine the limiting reactant (LR) and the mass (in g) of nitrogen that can be formed from 50.0 g N 2 O 4 and 45.0 g N 2 H 4 . Some possibly useful molar masses are as follows: N 2 O 4 = 92.02 g/mol, N 2 H 4 = 32.05 g/mol. N 2 O 4 (l) + 2 N 2 H 4 (l) 3 N 2 (g) + 4 H 2 O(g) A) LR = N 2 O 4 , 105 g N 2 formed B) LR = N 2 O 4 , 45.7 g N 2 formed C) No LR, 45.0 g N 2 formed D) LR = N 2 H 4 , 13.3 g N 2 formed E) LR = N 2 H 4 , 59.0 g N 2 formed
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