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?

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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

Silver chromate (Ag2CrO4; Ksp = 1.1×10–12) has a molar solubility of 6.5×10–5 M. What calculation provides the concentration of silver ions in a saturated solution of Ag2CrO4?

The neutralization reaction of HNO2 and a strong base is based on:                                            HNO2(aq) + OH–(aq) → H2O(l) + NO2–(aq)               K = 4.5×1010 What is the standard change in Gibbs free energy at 25 oC?

The density of a 5.58 m aqueous acetic acid is 1.04 g∙mL–1.  What is the molar concentration of this solution?  The molar mass of acetic acid, CH3COOH, is 60.06 g∙mol–1.

Given these data for the reaction A + B C, what is the value, with units, for the rate constant? Exp 0 (M) 0 (M) Initial Rate (M·s–1) 1 0.015 0.015 2.0×10–4 2 0.015 0.045 6.0×10–4 3 0.030 0.045 12.0×10–4    

The experimental data from a certain reaction gives these three graphs. What is the most likely order for this reaction?    

For the decomposition of mercury(II) oxide, HgO, to mercury and oxygen:                                            2HgO(s) → 2Hg(l) + O2(g) ΔGo = 117.1 kJ What is the standard Gibbs free energy of formation (ΔGfo) of mercury(II) oxide?

What is the molar concentration of an aqueous sugar solution with an osmotic pressure of 318.4 mmHg at 25 oC? 1 atm = 760 mmHg and R = 0.0821 (L·atm)/(mol·K)