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What volume of .01M HCL must be added to 20 ml of .04M phosphate buffer, pH 6.50, to reduce the pH to 5.5. pK of phosphate buffer is 7.20
To extract quinine from an aqueous solution, what pH should be used and why? I'm not sure if you use both pKa's or just one.
hat conclusions can you make concerning the size of the central atom X and the X-H bond length? Compare the four models of CHBrICI. Are they all the same (superimposable on each other? If the answer is yes, can you construct any that are not the s..
what tempreture must 0.040 moles of water vapor be heated in a 500ml flask before the pressure in the flask becomes 2 atm.
If the concentration of H2 in the equilibrium mixture is 0.426 M, what mass of methanol was initially introduced into the vessel?
Imagine a silica microsphere half of which is coated with a thin gold coating and having a trimethylammoniumpropanethiol molecule anchored to the gold.
A hydrogen atom with its electron in the n=3 energy level absorbs light with a wavelength of 1879 nm. the final energy level of the electron is
What is the mass of a magnesium block that measures 2.3 cm * 3.5 cm * 1.5 cm? The density of magnesium is 1.738 g/cm^3.
Carbonyl fluoride, COF2, is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride, CF4 via the reaction
surface molecules have fewer molecules to interact with than the inner molecules. values depend on size and
Find the ?H for the reaction below, given the following reactions and subsequent ?H values: H2SO4(l) ? SO3(g) + H2O(g)
Calculate the minimum number of photons, n, needed to make the reduction of 2 moles of NADP favorable for light absorbed at 6.80 × 102 nm. Assume that the amount of energy needed for the reduction of one mole of NADP to be favorable must exceed 21..
sodium hydroxide reacts with sulfuric acid to produce sodium sulfate and water. how many grams of sodium hydroxide are
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