A current of 2.0 A passes through an electrolytic cell for 600 seconds. What total charge passes through the cell?A. 300 C B. 600 C C. 1200 C D. 1800 C

1, Which of the following shorthand galvanic cell notations for the zinc – copper standard cell is correct?                        Cu2+  +  Zn  →  Zn2+  +  Cu (a) Cu2+ | Cu || Zn | Zn2+                                           (b) Cu2+ | Cu || Cu | Cu2+ (c) Cu2+ | 2e– || 2e– | Zn                                            (d) Zn | Zn2+ || Cu2+ | Cu (e) Zn | Cu2+ || Zn2+ | Cu

90% of deaf individuals are born to hearing parents.

The fact that Eskimos have many words for snow is a hoax because:

17. Calculate the pH of a 0.020 M HBrO solution? The Ka for HBrO is 2.5 X 10-9.          a) 4.80   b ) 4.91   c) 5.02          d) 5.15    e) 5.38

Which of the following statements is true regarding the titration curve of a weak acid being titrated with a strong base?

30. Choose the response that includes all the following combinations that are     buffer solutions and none that are not buffer solutions. All components are     present in 0.10 M concentrations.           I.        HCN and NaCN                                II.      NH3 and NH4Cl           III.     HNO3 and NH4NO3                        IV.     H2SO4 and Na2SO4           (a) I, III, and IV                    (b) I and II                             (c) II, III, and IV           (d) III and IV                         (e) I and III

Which of the following is the correct Henderson-Hasselbalch equation?A. pH = pKa − log([A⁻]/[HA])B. pH = pKa + log([A⁻]/[HA])C. pOH = pKa + log([HA]/[A⁻])D. pH = log([H⁺])

23. Calculate the solubility product constant for aluminum hydroxide (Al(OH)3. Its molar solubility is     2.9 x 10–9 mole per liter at 25°C.           (a) 9.8 x 10–26                        (b) 4.9 x 10–26                        (c) 7.1 x 10–35           (d) 2.1 x 10–34                        (e) 1.9 x 10–33

A 0.10 M solution of ammonium chloride (NH₄Cl) is prepared. Given that Kb for NH₃ is 1.8 × 10⁻⁵, what is the approximate pH of the solution?A. 4.63 B. 7.00 C. 9.37 D. 11.13Hint: NH₄⁺ is a weak acid. First calculate Ka = Kw/Kb.