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You need to produce a buffer solution that has a pH of 5.06. You already have a solution that contains 10 mmol (millimoles) of acetic acid. How many millimoles of acetate (the conjugate base of acetic acid) will you need to add to this solution? The pKa of acetic acid is 4.74.
Consider the reversible reaction: 2NO2(g)?N2O4(g)^-1 If the concentrations of both NO2 and N2O4 are 0.016 mol • L , what is the value of Qc? The answer is supposed to be 63 but how and why?
A Flask contains 0.320 mol of liquid bromine,Br_2. Determine the number of bromine molecules present in the flask.
Using a solution prepared by adding 467 mL of 0.400 M silver nitrate with 421 mL of 0.503 M sodium phosphate then determines what is the silver ion concentration in? Ksp of silver phosphate = 2.8 × 10-18
Carbon dioxide is eliminated from pyruvate ions by a decarboxylase enzyme through the following first order reaction Pyruvate(l) goes to CO2(g) + acetaldehyde(l)
Compute KP at this temperature If the pH of an aqueous solution is 8.23, what are the hydrogen- and hydroxide-ion concentrations of this solution?
What mass of NaOH is needed to precipitate the Cd2+ ions from 44.0 mL of 0.500 M Cd(NO3)2 solution?
If 155mL of wet {grm{H}}_2 is collected over water at 24 ^circ {rm C} and a barometric pressure of 739torr , how many grams of {grm Zn} have been consumed.
Joseph Priestley prepared oxygen by heating mercury(II) oxide. The compound HgO is stable at room temperature but decomposes into its elements (Hg and O2) at high temperatures. What conclusions can be drawn concerning DH and DS for this decomposit..
In chemical reactions the total number of moles of products must be the same as the total number of moles of reactants.
Nitrogen gas reacts with oxygen gas to produce nitrogen monoxide in an endothermic reaction. When the temperature of the reaction at equilibrium is raised, the equilibrium will shift
how many milliliters of 0.42 M solution of acetic acid, CH3COOH, will contain 0.50 grams of acetic acid
Elliptical holes estimate the angle of entry : Cos A bullet hole in a wall at a crime scene is elliptically shaped. The loner dimension is 20 mm and the shorter dimension is 14 mm. What is the angle of entry?
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