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Chromic acid is a diprotic acid H2CrO4 with Ka1 = 0.18 and Ka2 = 3.2 x 10-7. A solution of potassium chromate is prepared at pH 5.43. Calculate the fraction of the total chromate in this solution that is present as the chromate ion CrO42-.
Polyunsaturated fatty acids (PUFAs) have several carbon-carbon double bonds as present in beta-carotene
One observation well is located 45 meters away and has a water surface that is 44.35 meters above the bottom of the aquifer. A second observation well is located 85 meters away and has a drawdown of 0.25 meters. What is the coefficient of permeabi..
The exothermic chemical reaction CO(g) + H2O(g) CO2(g) + H2(g) has Kc = 0.034 at 25°C. We currently have a flask containing all the components listed in this equation at equilibrium at 25°C. Subsequently, we will either (1) add some H2 to the flas..
A 0.366-g sample of an unknown reducing agent required 30.0 mL of 0.100 N (normality) KMnO4 for titration. What is the equivalent weight of the reducing agent?
Ammonium carbamate (NH2COONH4) is found in the blood and urine of mammals. At a temperature of 511 K, Kc = 0.056 for the following equilibrium: NH2COONH4(s) 2 NH3(g) + CO2(g). If 10.2 g of ammonium carbamate is introduced into a 0.500 L containe..
Using this equation, how many moles of water are produced when .875 moles of methane burn?
The initial concentrations of the three gases are 0.550 M H2S, .550 M H2, and .275 M S2. Determine the equilibrium concentrations of the gases.
Place the following complex numbers in a two-dimensional complex plane and find their absolute value lzl and phase angle arg
Explain, in detail, how you would prepare this solution so a labmate could prepare it from your instructions
Chromium is produced by reacting its oxide with aluminum. If 76 grams of Cr2O3 and 27 grams of Al completely react to form 51 grams of Al2O3 how many grams of Cr are formed
A 15.00 mL sample of unknown concentration of sulfuric acid is precititated with excess lead(II) nitrate and a precipitate of lead(II) sulfate is collected.
A cobalt compound has an observed magnetic moment of 5.2 B.M. What can you deduce about the compound?
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