@X@user.full_name@X@ @GMU: Radioactive substances decay by first-order kinetics. How many years would be required for a sample containing carbon-14 to decrease to 66.33% of its initial activity? The half-life of carbon-14 is 5.73e3 years.

@X@user.full_name@X@ @GMU: When 0.3572 g of aspirin was dissolved in 105.8 mL of water, the osmotic pressure at 29.14°C was 0.4742 atm. What is the formula mass of this compound?

@X@user.full_name@X@ @GMU: A mixture containing an initial concentration of 0.1533 M for N2 and 0.1311 M for O2 is allowed to come to equilibrium (see reaction below). What must be the equilibrium concentration of NO?N2(g) + O2(g) → 2NO(g) Kc = 2.70e-18

@X@user.full_name@X@ @GMU: The reaction below is a exothermic reaction. What would one have to do to shift the equilibrium to the right?2SO2(g) + O2(g)→2SO3(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 0.298 0.307 7.41e-7 0.571 0.307 1.42e-6 0.298 0.524 9.68e-7

@X@user.full_name@X@ @GMU: What is the activation energy (in kJ/mol) for the reaction below if the rate constants are 1.300 M-1s-1 at 427.00°C and 2.76 M-1s-1 at 450.65°C?NO2(g) + CO(g) → NO(g) + CO2(g)

@X@user.full_name@X@ @GMU: Determine the mole fraction of benzene if 5.2414 g of benzene, C6H6, was mixed with 7.33 g of cyclopentene, C5H8. MW(C6H6) = 78.114 g/mol; MW(C5H8) = 68.119 g/mol.

What would be the expected rate law for the mechanism described below?1   O3 + Br → BrO + O2 fast 2   BrO + O → Br + O2 slow

On a piece of paper, write “2+2=4” Take a picture/scan of it and upload it.

Which of the following conditions will cause equilibrium to shift to the right?FeO(s) + CO(g) ⇋ Fe(s) + CO2(g)