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A buffer is composed of 0.400 mol H2PO4^- and 0.400 mol HPO4^2- diluted with water to a volume of 1.00 L. The pH of the buffer is 7.210. How many moles of HCl must be added to decrease the pH to 6.210?
Solid carbon dioxide, CO2, (dry ice) goes directly from solid to gaseous state at -78°C. The molar heat of sublimation is 25. 2 kJ/mol.
The activity of the antibiotic penicillin slowly decomposes when stored in a buffer at pH 7.0, 298K. The time dependence of the penicillin antibiotic activity
Define Supercritical fliud. Give an example and it's properties. Which fundemental thermodynamic property is important to the solubility
Compounds in a and b were named incorrectly. On a sheet of paper draw the molecule that fits the given description. From the structure you drew determine the correct IUPAC name. Write the correct IUPAC name in the blank.
Suppose that coal of density 1.5 g/cm3 is pure carbon. (It is, in fact, much more complicated, but this is a reasonable first approximation.)
What volume of gold would be equal in mass to a piece of copper with a volume of 140.0 mL. The density of gold is 19.3 g/mL; density of copper is 8.96 g/mL
The second equivalence point was reached after 35.75mL of 0.1005 M hydrochloric acid was added to a 50.00 mL solution containing your sodium carbonate unknown., calculate the pH of the solution at the second equivalence point
Explore the effects of acid rain pre and post the 1990 Clean Air Act. Pair up and choose one of the topics listed below. One person should research and report on the damage that was being observed due to acid rain prior to 1990.
Determine the structures of the compounds that would give the products
A certain reaction has an enthalpy of change in H = 54 kJ and an activation energy of Ea=81 kJ. What is the activation energy of the reverse reaction
The equilibrium system H2 + I2 ? 2HI has equilibrium constant K = 6.2. Starting from the nonequilibrium state [H2] = 0.3 M, [I2] = 0.5 M, and [HI] = 0.7 M, what are the concentrations of the three molecules when equilibrium is established
The oxide of which of the following metals should have the greatest lattice energy?
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