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How many electrons are transferred in the process below when balanced in basic solution?                                            ClO4–(aq) + Fe(s) → ClO3–(aq) + Fe3+(aq)              unbalanced

What is the standard electrode potential for a galvanic cell constructed in the appropriate way from these two half-cells?                                              Standard Reduction Potentials   Cr3+(aq) + 3e– → Cr(s)              E°red = –0.74 V                                   Co2+(aq) + 2e– → Co(s)              E°red = –0.28 V  

Three compounds with the generic formulas MX; MX2; and M2X all have the same value of Ksp = 2.5×10–8. What describes the relative molar solubilities of these compounds?

For the process O2(g) → 2O(g), ΔH° = 498 kJ·mol–1.  What would be the predicted sign of ΔS°rxn and the conditions under which this reaction would be spontaneous?

For the galvanic cell at 298 K                                            Zn(s) + 2In2+(aq)→ Zn2+(aq) + 2In+(aq)                    Eocell =  0.36 V What is the equilibrium constant, K?

After 55 years, what mass (in g) remains of a 200.0 g sample of a radioactive isotope with a half-life of 10.0 years?

For the synthesis of nitrogen dioxide, NO2:                                            2N2(g) + O2(g) → 2NO2(g) this reaction has the energy diagram shown.  What is the spontaneity of the reaction?

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What is the coefficient for water when the reaction is balanced in acidic solution? Cr2O72–(aq) + Mn2+(aq) → Cr3+(aq) + MnO2(s)              unbalanced

What statement about a galvanic cell constructed with Cu+/Cu and Fe2+/Fe is correct? Standard Reduction Potentials Eored / V Cu+ + e– → Cu +0.52 Fe2+ + 2e– → Fe –0.44