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16) A 1.00 g sample of a metal X (X2) was added to 100.0 mL (0.50 M) H2SO4 solution, after reaction, all the excess amount
16) A 1.00 g sample of a metal X (X2) was added to 100.0 mL (0.50 M) H2SO4 solution, after reaction, all the excess amount of H2SO4 were back titrated with 33.4 mL (0.5M) of NaOH The atomic weight of the element "X (in g/ mol)" is: A) 12 B) 24 C) 40 D) 55.8 E) 52.6 15) For the equilibrium 2A + 3B 2C If the equilibrium concentrations of A, B, and Care 0.024 M, 1x102M, and 1x102 M respectively, calculate the equilibrium constant (Keq) A) 1.73 x10-13 B) 1.73 x100 C) 1.73 x 10-1 D) 1.73 x 10-5 E) 1.73 x 10-15 For the equilibrium 3A 2B and Keq = 7.55x1012 If 50.0 mL (0.2 M) of (A) were allowed to react in presence of 6 mmol of (B) Calculate the molar concentrations of A and B at equilibrium. [A] = [B] =
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