solutions

Questions 9 - 11: a) COsub3^2- b) MnOsub4^- c) NHsub4^+ d) Ba^2+ e) Al^3+ Assume that you have several unknowns each consisting of an aqueous solution of a salt that contains one of the ions listed above, which ion must be present if the following observations are made of that unknown? 9) the solution is colore ...continues

spontaneous reaction

Questions 12-13: The spontaneous reaction that occurs when the cell above operates is 2 Ag^+ + Cd(s) -> 2 Ag(s) + Cd^2+ a) voltage increases b )voltage decreases by remains but remains above zero c) voltage becomes zero and remains remains at 0. d) no change in voltage occurs. e) direction of voltage change ca ...continues

electrons shells, etc.

Directions: Each of the questions or incomplete statements below is followed by five suggested answers or completions. Suggest or select the one that is best in each case. 14) Hydrogen halide Normal Boiling Point, C HF +19 HCl -85 HBr -67 HI -35 The liquified hydrogen halides have the normal boiling ...continues

oxidation

Questions 17 - 18: Hsub3AsOsub4 + 3I^- + 2Hsub3O^+ -> Hsub3AsOsub3 + Isub3^- + 3Hsub2O The oxidation of iodide ions by arsenic acid in acidic aqueous solution occured accoring to the balanced equation above. The experimental rate law for the reaction at 25 degree C is: 17) what is the order of the reaction with res ...continues

pH, decay, temperature questions

19) The critical temperature of a substance is the a) temperature at which the vapor pressure of liquid is equal to the external pressure b) temperature at which the vapor pressure of the liquid is equal to 760mm Hg. c) temperature at which the solid liquid in vapor phases are in equilibrium d) temperature at which the liq ...continues

Molarity/ chemical equations, shapes

23) ....CrOsub2^- + ... OH^-...CrOsub4^2- + ...Hsub2O+ e^- When the equation for the half reaction above is balanced what is the ratio of the coefficient's OH^-: CrOsub2^-? a) 1:1 b) 2:1 c) 3:1 d) 4:1 e) 5:1 24) CuO(s) + Hsub2(g) <--- / ---> Cu(s) + Hsub2O(g) triangle H = -2.0kJ The Substances in ...continues

Bond length / moles / cathode.

27) which of the following molecules has the shortest bond length a) N sub 2 b)O sub 2 c)Cl sub 2 d)Br sub 2 e) I sub 2 28) what number of moles of Osub2 his needed to produce 14.2 Grams 0f Psub4Osub10 (molec mass =284g)from P? 29) if 0.060 faraday is passed through an electrolytic cell containing a solution of ...continues

standard heat of formation / acid-base

CHsub4(g) + 2Osub2(g) --> COsub2(g) + 2Hsub2O(l) triangleHsub f^degree symbol Hsub2O(l) =-285.8kJ/mole triangleHsub f^degree symbol COHsub2(g) =-393.3kJ/mole 30) what is the standard heat of formation, triangleHsubf^degree symbol, of methane, CHsub4(g) as calculated from the data above? 31) each of the following ...continues

Pi bonding, temperature volume, misc.

32) two flexible containers for gasses are the same temperature and pressure. One holds .50 grams hydrgen and the other 8.0 grams of oxygen. which the following statements regarding these gas samples is false a) the volume of the hydrogen container is the same as the volume of the oxygen container b) the number of mol ...continues

Which if any of the following species...

35) which if any of the following species are in the greatest c in a 0.100 molar solution Hsub2SOsub4 in water? a) Hsub2SOsub4 molecules b) Hsub3O^+ ions c) HSOsub4^- ions d) SOsub4^2- ions e) all species are in equillibrium and thus the same concentration. 36) at 20 degrees C the vapor pressure of toluene is 22mm Hg ...continues