You have 250.0 mL of a 4.00 M sugar solution. You and 217.3 mL of water of this

Question

You have 250.0 mL of a 4.00 M sugar solution. You and 217.3 mL of water of this solution. Determine the concentration of the divided sugar solution after the water has been added. A) 4.00 M B) 2.39 M c) 2.88 M D) 2.14 M E) 2.47 M A solution is prepared by dissolving 8.83 g of Na_gSO_4 (MM - 142.052 g/mol) is enough water to make 225 mL of solution. Calculate the solution molarity. A) 0.0622 M B) 1.99 M C) 0.620 M D) 0.276 M E) 0.501 M A solution with a pH of 2 is how many times more acidic as a solution with a pH of s? A) 3 B) 0.4 C) 10000 D) 1000 E) 7 A solution where [H^+] = 10^-13 M is A) basic B) neutral C) acidic D) strongly acidic E) two of these Which one of the following molecules contains a double bond? a. FOF b. OCO c. HCN Choose the net ionic reaction writt5en CORRECTLY for: (NH_4)_2SO_4(aq) + PbBr_2(aq) rightarrow 2 (NH_4)Br_(aq) + PbSO_4(aq) A) (NH_4)_2SO_4(aq) + PbBr_2(aq) rightarrow 2 (NH_4)Br_(aq) + PbSO_4(s) B) NH_4(aq)^+ Br^-_

Explanation / Answer

21. Before dilution                              After dilution

M1 = 4M                                         M2 =

V1   = 250ml                                       V2 = 250+217.3ml   = 467.3ml

     M1V1    = M2V2

     M2 = M1V1/V2     = 4*250/467.3 = 2.14M>>>>> D

22. Molarity = weight of solute *1000/gram molar mass * volume of solution in ml

                 = 8.83*1000/142.05*225   = 0.276M >>>>>D

23. D

24. [H+] = 10-1 -------------10-7 ------------10-14

                         acid       neutral     base

    A. base

25. B Co2    O=C=O

26.D

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