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Calculate the pH of a buffer solution that contains 0.25 M benzoic acid (C6H5CO2H) and 0.15 M sodium benzoate (C6H5COONa). [Ka = 6.5 ? 10-5 for benzoic acid]
What is the van't Hoff factor for HX in water? b) What is the molality of X1- ions in the solution?
A 33.0-g sample of an alloy at 93.0°C is placed into 258 g of water at 22.0°C in an insulated coffee cup. Assume that no heat is absorbed by the cup. If the final temperature of the system is 31.1°C
Draw the molecular-orbital-energy level diagram for the SO molecule and the NF molecule
Question about Aromatic Compounds, Explain the following: a.) The cycloheptatrienyl anion is antiaromatic, whereas the cyclononatetraenyl anion is planar (in spite of the angle stain involved)
Which of the following would be expected to be colored?
Assume you 0.010 mol of N2O4 (g) in a 2.0L flask at 50 degrees Celcius. After the system reaches equilibrium, [N2O4] is 0.00090 M. What is the value of Kc for this reaction
When 27 mL of a 230 mL stock solution containing 2.2 M BaF2 is diluted to 81 mL, what is the concentration of F- in the new solution?
A chemical reaction has ?G° = 10.0 kJ and ?S° = 50.0 J/K. Calculate ?H° for this reaction at 25°C. Could this reaction ever be spontaneous? Explain your answer please.
What is the mole fraction of Kr if the partial pressure of Xe and Ar are 1.60 atm and 2.8 atm, respectively?
Classify the following solutions as saturated, unsaturated, or supersaturated, based on your graph. Note that c. and d. require you to convert from the concentrations give to g/100 g H2O before you refer to the graph.
How much work (in J) must be done to inflate the balloon when atmospheric pressure is 767 torr?
Identify the substance produced in the liver that helps catalyze this reaction.
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