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@X@user.full_name@X@ @GMU: Radioactive substances decay by first-order kinetics. How many days would be required for a sample containing phosphorus-32 to decrease to 67.66% of its initial activity? The half-life of phosphorus-32 is 1.42e1 days.

@X@user.full_name@X@ @GMU: What is the solubility in mol/L of H2S at a partial pressure of 374.5 torr, if the solubility at a partial pressure of 507.7 torr is 0.06614 mol/L?

@X@user.full_name@X@ @GMU: Determine the mole fraction of cyclohexene if 5.4922 g of cyclohexene, C6H10, was mixed with 6.00 g of cyclopentene, C5H8. MW(C6H10) = 82.145 g/mol; MW(C5H8) = 68.119 g/mol.

@X@user.full_name@X@ @GMU: Determine the mass of LiI required to produce a 0.2990 molal solution by dissolving LiI in 126.7747 g of H2O.

@X@user.full_name@X@ @GMU: What is the rate constant at 447.21°C for the reaction below if the rate constant is 1.30 M-1s-1 at 427.00°C and the activation energy is 134.00 kJ/mol?NO2(g) + CO(g) → NO(g) + CO2(g)

@X@user.full_name@X@ @GMU: What is the solubility in mol/L of NO at a partial pressure of 610.6 torr, if the solubility at a partial pressure of 466.6 torr is 0.001167 mol/L?

@X@user.full_name@X@ @GMU: The osmotic pressure of an unknown solution is 0.428 atm at 13.06 °C. Which of the solutions below is the most likely one? Assume any salt is completely ionic!

@X@user.full_name@X@ @GMU: The following data was obtained by the method of initial rates. What is the value of the rate constant for the reaction of A with B to produce product? [A]o [B]o Rate, M/s 0.340 0.317 3.40e-4 0.561 0.317 9.26e-4 0.340 0.569 4.56e-4

@X@user.full_name@X@ @GMU: Determine the rate of formation of NO2 if the rate for formation of O2 is 0.299 M/s. Use the reaction below.2N2O5(g) → 4NO2(g) + O2(g)

@X@user.full_name@X@ @GMU: What is the solubility in mol/L of CO at a partial pressure of 296.4 torr, if the solubility at a partial pressure of 401.3 torr is 0.0005491 mol/L?