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Aspirin is a weak acid (pKa=3.5). When it enters the body, the undissociated form of the acid can freely permeate membranes where the dissociated ions cannot. Determine the ratio of total drug in the blood plasma (pH 7.4) over the stomach (pH 1.0)
The half-cell is a chamber in the voltaic cell where one half-cell is the site of an oxidation reaction and the other half-cell is the site of a reduction reaction.
describe an incident fire spill explosion etc you have experienced or research one on the internet professional journal
What happens inside a 9 volt battery during discharge, chemically speaking. Does the Law of Conservation of Mass apply during discharge
explain why DNA double stands separate by heating without degradation of the stands to their component molecules.
Methane is completely burned with 20.0% excess air, with 25.0% of the carbon going to CO. What is the partial pressure of CO in the stack (exit) gas if the gas exits at a pressure of 740 mm Hg and a temperature of 300°F
a mole of hydrogen gas was found to have an average de broglies wavelength of 1a 10-10m the approximate length of the
flask contains 10.0 mL of HCl and a few drops of phenolphthalein indicator. The buret contains 10.0 mL of 0.220 M NaOH. 1. what volume of NaOH is needed to reach the end point of the titration?
Using concentrated acetic acid and solid sodium acetate, how would you prepare 10 l of 0.1 M acetate buffer at pH 4.75? The pKa for acetic acid is 4.75. What Volume of concentrated acetic acid is needed (mL)?
the active ingredient in toothpaste is sodium fluoride, an anticavity agent. a 170 g tube of toothpaste lists the concentration of sodium fluoride a s0.24%. how many grams of sodium fluoride are in a toothpaste.
write a 700- to 1050-word paper based on the week one readings on the field of gerontology in which you describe the
Calculate the ionic strength of a solution containing 0.010 M calcium sulfate and 0.010 M sodium chloride. Show all work.
The angular momentum quantum number for the two highest energy valence electrons in an atom of lead is
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