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Presume you desire to prepare an acetic buffer at pH = 3.95 by adding 0.200 M KOH to 200.00mL of 0.300 M acetic acid CH3COOH. Explain how much volume of the base do you need in order to prepare such a buffer solution?
Calculate the energy and the wavelength, in nanometers, of light emitted when an electron in an excited hydrogen atom falls from the n=3 level to the n = 1 level.
Consider a cylindrical container partially filled with ethanol (C2H6O). Using the model in which ethanol vapor pressure is a result of equilibrium between the rate of ethanol evaporation and condensation.
What is the proper coefficient for water when the following equation is completed and balanced for the reaction in basic solution
If you open the valve on the tank and release the helium into a room with a volume of 10,000 liters, what will happen to the "space" between the helium atoms? Clearly explain
Draw the lewis structures for these ions, and show which atom in each bears the formal charge. a.) CH3NH3+ b.)CO3,2- c.) OH-
What is the percent yield of a reaction in which 258 g phosphorus trichloride reacts with excess water to form 120. g HCl and aqueous phosphorous acid (H3PO3)
what mass ratio of sugar to water is required to raise the boiling point of a sugar solution 145 degrees celcius?
Van der Waals constants can be found here. Use the ideal gas equation to calculate the pressure under the same conditions
What is the copper physcial and chemical properties and it's extraction methods and it's melting and poiling point
Thus the pressure of the components on the left is P where as the pressure on the components on the right is P+Y. To make this clear I will write the chemical potentials as a function of the pressure (eg u1* (P) for the pure solvent on the left)
The Ksp for Mn(OH)2 is 2.0 x 10-13. At what pH will Mn(OH)2 begin to precipitate from a solution in which the initial concentration of Mn2+ is 0.10 M
Aluminum oxide, Al2O3 (molar mass = 101.96), occurs in nature as a mineral called corundum which is noted for its hardness and resistance to attack by acids. Its density is 3.97 g/cm3. Calculate the number of atoms of aluminum in 15.00 cm3 of coru..
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