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Calculate the final temperature of a mixture of 150.0 g of ice initially at -16.5C and 443.5 g of water initially at 84.0C
Explain the use of beta-alanine? Is it used as a H+ source, or something else? Why can malonic acid be reacted in V-D modification, while only its ester can be reacted in standard Knoevenagel condensation conditions?
External fields (such as those generated by a laser) can couple electronic states together. By a well-chosen laser pulse, an H atom is created in an equal superposition of the 1s and 2p0 states.
Phenol is a weak organic acid with Ka=1.0x10^-10. How many grams of phenol do you need to add to 500. mL of water to make a pH=5.75 solution
A buffer was prepared by dissolving .200 mol of the weak acid Ha (ka 1.00x10^-5) plus .050 mol of its conjugate base Na+A- in 1.00L find the pH
The average pH of normal arterial blood is 7.40. At normal body temperature (37C), Kw = 2.4 * 10^-14.
Water is added to 25.0 mL of a 0.776 M KNO3 solution until the volume of the solution is exactly 500 mL. What is the concentration of the final solution.
Codeine, C16H21NO3, is a monohydroxic derivative of morphine with pkb=6.05. Calculate the PH of a 80.0 ml soultion that contains 6.5 mg of codeine
Draw a hypothetical titration curve and label the points where .5 equivalents, 1.0 equivalents, 1.5 equivalents, and 2.0 equivalents of base have been added. What is the relative concentration of [H2A], [HA-], and [A2-] at each of those points?
A buffer solution is composed of 1.360 g of KH2PO4 and 5.677 g of Na2HPO4. What is the pH of the buffer solution?
how many moles O2 of are present? (The mole fraction of in dry air is 0.2095.) How many grams of C8H18 could be combusted by this quantity of O2
A small bubble rises from the bottom of a lake, where the temperature and pressure are 8ºC and 6.4 atm, to the water's surface, where the temperature is 25ºC and pressure is 1.0 atm.
calculate the freezing point and boiling point of a solution of 383 g of glucose dissolved in 400.0g of H2O
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