Blog

Determine if the reverse reaction for the energy level diagram is endothermic or exothermic and what the ΔH for the forward reaction is.

@X@user.full_name@X@ @GMU: Determine the mole fraction of toluene if 7.1397 g of toluene, C7H8, was mixed with 6.86 g of benzene, C6H6. MW(C7H8) = 92.141 g/mol; MW(C6H6) = 78.114 g/mol.

@X@user.full_name@X@ @GMU: The reaction below is an endothermic reaction. What would one have to do to increase the size of the equilibrium constant?CaCO3(s)→CaO(s) + CO2(g)

@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!