@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 59.86% of its initial activity? The half-life of phosphorus-32 is 1.42e1 days.

@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: 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: To what temperature would the reaction below need to be heated to have a rate constant of 9.59e-4 M-1s-1 if the rate constant was 2.700e-4 M-1s-1 at 327.00°C and the activation energy was 166.00 kJ/mol?H2(g) + I2(g) → 2HI(g)

@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? o o Rate, M/s 0.392 0.221 2.05e-4 0.684 0.221 2.71e-4 0.392 0.332 2.05e-4

@X@user.full_name@X@ @GMU: Initially there were equilibrium concentrations of 0.1611 M A, 0.5000 M B, and 0.1611 M C. Which change will cause Qc to be greater than Kc? Use the reaction below.5A → 2 B +3 C Kc = 0.644

@X@user.full_name@X@ @GMU: What is the value of Kc at 726.85 °C for the reaction below if Kp is 4.20e-3 at this temperature?CH4(g) + 2H2S(g) → CS2(g) + 4H2(g)

@X@user.full_name@X@ @GMU: It took 337.9 s for 39.58% of a substance to react according to first-order kinetics. What is the value of the rate constant?

@X@user.full_name@X@ @GMU: What is the boiling point elevation when 19.28 g of lysine (formula mass = 146.00 g/mol) is dissolved in 158.43 g of benzene? The boiling point elevation constant is 2.530 (°C*kg)/mol.

Consider the reaction.H2(g) + I2(s) ⇋2HI(g)What is the correct expression for Kc?