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

Calculate the pH of a 0.200 M NaCN solution. The Ka for HCN is 4.9 × 10-10.

Based on the information in the table of standard reduction potentials below, calculate for. Half-reaction E° +1.80 V +1.50 V +0.771 V +0.535 V −0.124 V −1.66 V −2.37 V −2.93 V

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

Determine the vapor pressure of a solution at 25°C that contains 76.6 g of glucose (180.156 g/mol) in 250.0 g of water. The vapor pressure of pure water at 25°C is 23.8 torr.

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?

Which is the weakest acid?  

A 25 mg sample of wood produced 3072 β− particles from carbon-14 in 3 hours, while a 25 mg sample of fresh wood produced 9216 β− particles in the same period of time. The half-life of carbon-14 is 5730 years. How old is the wood from the archaeological site?

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)

What is the freezing point of a solution made from 22.0 g of octane (114.23 g/mol) dissolved in 148.0 g of benzene? [For benzene, freezing point = 5.50°C, Kf = 5.12°C/m]