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What is the pH of a buffer solution prepared with 0.05 M sodium borate and 0.004 M boric acid? The pKa value of boric acid is 9.21 at 25 degrees Celcius (round to two decimal places).
Calculate the number of ATPs generated from the metabolic oxidation of the four carbons of acetoacetyl-CoA to CO2. Now consider the homolog derived from oxidation of an odd numbered carbon chain
student performed two melting-point determination on a crystalline compound. in one determination the capillary tube contained a sample about 1-2 mm in hight and the melting range was found to be 141-142C
A sample of gas in a balloon has an initial temperature of 41 degree celsius and a volume of 1770 L . If the temperature changes to 96 degrees celsius, and there is no change of pressure or amount of gas, what is the new volume,V2 ,of the gas
The equilibrium pressure of H2 over solid uranium and uranium hydride, UH3, at 500 K is 139 Pa. Calculate the standard Gibbs energy of formation of UH3(s) at 500 K.
Explain why a 1m solution of the compound FeCl2 in water has a lower freezing temperature than a 1m solution of KCl in water and what is the empirical formula
Excessive quantities of wash water are added to the CaC2O4*H2O precipitate. Will the mass of the CaC2O4*H2O be reported too high, too low, or unaffected. Explain
Endorphins: What Are They and How Do They Work?, Describe in brief the chemistry and biology of the feel-good chemical, endorphins. Also explain why the name feel good
what reaction pathway is followed when the 1-bromo-1,2-dimethyl cyclohexane is heated with a concentrated solution of sodium ethoxide in ethanol? SN1 SN2, E1 E2
Determine the value of Keq for Ca3(PO4)2 (Ksp=2.0*10-33) dissolving in acid solution, given that Ka2=6.17*10-8, Ka3=4.79*10-13 for H3PO4.
What fraction of piperazine (perhydro-1,4-diazine) is in each of its three forms (H2A, HA-, A2-) at pH 8.26.
Which compound is more reactive toward electrophilic substitution e.g nitration? Explain you reasoning.
calcium oxide reacts with water in a combination reaction to produce calcium hydroxide caos h2ol --gt caoh2s. in a
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