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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

What is the freezing point of a solution prepared from 50.0 g ethylene glycol (62.07 g/mol) and 85.0 g H2O? [For water, Kf = 1.86°C/m]  

The reaction seems to follow the rate law Rate = k[NO2]2. Is the following a valid mechanism and why?Step 1:                                                    (very fast, reversible)Step 2:                                        (slow)

Consider the following reaction at equilibrium. What effect will adding some C have on the system? CO2(g) + C(graphite) ⇌ 2 CO(g)

The following titration curve is most likely to be associated with