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Consider the reaction , for which ΔH ° = +77.2 kJ/mol. Which of the following statements regarding its temperature dependence is true?

For the reaction X + Y → Z, the reaction rate is found to depend only upon the concentration of X. A plot of 1/X versus time gives a straight line.   What is the rate law for this reaction?

What is the pH of a 0.100 M NH3 solution that has Kb = 1.8 × 10-5? The equation for the dissociation of NH3 is NH3(aq) + H2O(l) ⇌ NH4+(aq) + OH-(aq).

Which is the weakest acid?  

Which is the weakest acid?  

Consider the following reaction at equilibrium. What effect will reducing the volume of the reaction mixture have on the system? CuS(s) + O2(g) ⇌ Cu(s) + SO2(g)

If the half-life of tritium is 12.26 years, what percentage of the original quantity of the isotope is left in a sample after 20.0 years?

Suppose 67.5% of a sample of radioactive sodium-24 has decayed after one day. Estimate the half-life of Na-24.

Place the following in order of decreasing standard molar entropy.

When titrating a weak base with a strong monoprotic acid at 25°C, the