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Explain what is the pH at the equivalence point in the titration of 10.0mL of 0.41 MHZ with 0.200 M NaOH? Ka = 3.7 × 10-5 for HZ.
An unidentified metal crystallizes in a body-centred cubic lattice with an edge length of 429 pm. The density of the metal is found to be 0.967 g/cm 3 . What is the identity of the metal
At a certain temperature, the solubility of potassium iodate, KIO3, is 41.1 g/L. Calculate its solubility product constant for this temperature.
In thin layer chromatography what mobile phase would give poor mobility of methyleneblue. please explain
Given a stock solution of a food dye having a concentration of 1.0 x 10-5 and an absorbance of 0.700. If a new solution is made by diluting exactly 10.0 mL of the solution with exactly 44.4 mL of distilled water, what should the absorbance of the ..
This solution is then analyzed for nitrate ion by adding iron (II) sulfate solution and more sulfuric acid, heating the test tube and its contents. The nitrate ion reaction is positive.
List the different strengthening mechanisms and identify the ones that would not apply to pure elemental materials
What is the pH of a solution that has a formic acid (HCHO2) concentration of 0.39 and a potassium formate (KCHO2) concentration of 0.12? The Ka for formic acid is 1.7 x 10-4.
what is the molar mass of the gas in a glass bulb with a volume of 2.50 l at a temperature of 22 degrees c and a
a 265- flask contains pure helium at a pressure of 757 . a second flask with a volume of 485 contains pure argon at a
Which ones of the following salts contains a metal that will undergo extensive hydrolysis when dissolved in water
A semipermeable membrane is placed between the following solutions. Which solution will decrease in volume? Solution A: 1.31% (m/v) starch Solution B: 7.48% (m/v) starch
Nalorphine (C19H21NO3), a relative morphine, is used to combat withdrawl symptoms in narcotics users. How many grams of a 0.0036 molality aqueous solution of nalorphine are needed to obtain a dose of 2.51mg
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