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The pH of a 0.10 M nicotinic acid solution is 2.93. What is the approximate value of Ka for nicotinic acid, HC6H4NO2? Assume small percent dissociation. pH = ?log10[H+].
Calculate the volume of carbon dioxide at 20.0C and .950 atm produced from the complete combustion of 2.50 kg of methane. Compare your result with the volume of CO2 produced from the complete combustion of 2.50kg of propane (C3H8)
the chromic acid test acetone, formaldehyde, propanal, 3-pentanone, acetophenone, and benzaldehyde
Determine how much PV work is done if 80.0 g of C 2 H 4 and 125 grams of hydro chloric acid are permissible to react at atmospheric pressure and the volume change = -63.9 L? express your answer in kilojoules
What observations might enable us to deduce that a chemical change has occured when dilute aqueous
Why would it be more appropriate to put the elements La and Ac in the bottom two periods and put Lu and Lr in the transition metals? Why don't we see the use of any sublevels higher than the f sublevel?
Assume the products are all gaseous. Show all your work. What is delta G and is the reaction spontaneous at 298K or nonspontaneous
A liquid has a change in enthalpy of vaporization of 35.0Kj/mol and a boiling point of 137c . what is the vapor pressure at 109c
The heat of neutralization of HCl by NaOH is H°rxn = -56.2 kJ/mol. How much heat is released when 125 mL of 1.750 M HCl is mixed with 195 mL of 0.667 M NaOH.
Typically, gasohol is a mixture of 90% octane H8C18 and 10% ethanol C2H4OH. Determine the energy output of 1 gram of gasohol using the following two pieces of information
At high temperature, ammonia reduces copper(II) oxide to the free metal: 2NH3(g) + 6CuO(s) => N2(g) + 3Cu2O(s) + 3H2O(g) Step 2: 2NH3(g) + 3Cu2O(s) => N2(g) + 6Cu(s) + 3H2O(g)
What is the percent yield of a reaction in which 238 g phosphorus trichloride reacts with excess water to form 143 g HCl and aqueous phosphorus acid (H3PO3)?
With acid-catalyzed condensation of a molecule with two aldehyde groups that is suitable for forming 5- or 6-membered rings, are both carbonyls protonated right away at the same time
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