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20mL of a solution of a weak base ( HA, Kb=5.12x10^-6) was titrated with .1000 M HCl; the equivalence point occured at 4.67 mL of HCl.Calculate the pH at 0.00 mL of added HCl and at 2.00 mL of added HCL
why is the ortho-form of the diamine, and why is the ortho- form of the diamine a hindering impurity that must be rigorously removed before the production of Kevlar and Nomex?
A mixture of neon and oxygen gases at a total pressure 975 mm Hg contains neon at a partial pressure of 325 mm Hg. If the gas mixture contains 3.75 grams of neon,
Isooctane (2,2,4-trimethylpentate), one of the many hydrocarbons that make up gasoline, burns in air to give water and carbon dioxide.
What is the density of a substance if a 2.50mL sample has a mass of 0.880g at room temperature? ( show calculations) What is the specific gravity of the substance?
How many kilocal are required to increase the temp of 15.6g of iron from 122C to 355C? the specific heat of iron is
It takes 48.0J to raise the temperature of an 9.60g piece of unknown metal from 13.0c to 24.0. What is the specific heat for the metal? Express your answer numerically, in J/g.C
Draw the crossed aldol condensation product formed between benzaldehyde and acetone
which compunds moves to the aqueous NaOH? Provide the chemical reaction that occured when NaOH was added. Clearly indicate the different between ionic bond and covalent bond.
1119. J of energy, to what volume will the gases expand against a constant pressure of 645. torr if all the energy of combustion is converted into work to push back the piston?
explain the biochemical changes that takes place during the investment phase of glycolysis
A concentration cell consists of two H2/H+ electrodes. Electrode A has H2 at 0.83 atm bubbling into 0.29 M HCl. Electrode B has H2 at 0.56 atm bubbling into 1.8 M HCl.
Formic acid, HCHO2, is a convenient source of small quantities of carbon monoxide. When warmed with sulfuric acid, formic acid decomposes to give CO gas
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