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Calculate the molar concentration of propionic acid (HC3H5O2) in solution if 10.00 mL of a propionic acid solution is neutralized with 16.85 mL of 0.143 M NaOH solution.
a 1.0cm3 sample of lead and a 1.0cm3 of glass. I drop each in a separate beaker of water. How do the volumes of water that are displaced by the samples compare?
The H+ concentration of a 1 M solution of benzoic acid is 8x10^-3 M. What percent of the benzoic acid, C6H5COOH is ionized in this aqueous solution?
in a calorimeter 50.0 ml of 60 deg celcius water is added to50 ml of 14.0 deg celcius water. if the maximum
Phosphatidylethanolamine and PIP2 containing identical fatty acyl residues can be hydrolyzed at the same efficiency by phospholipase C. Will the hydrolysis products of the two lipids have the same effect on protein kinase C
calculate the energy in joules of a single photon associated with the frequency. Eneter your answers in scientific notation.
Find the velocity of an electron emitted by a metal whose threshold frequency is 2.15×1014 {rm s^{-1}} when it is exposed to visible light of wavelength 4.76×10-7 {rm m}.
A buffer solution is made that is 0.334 M in HCN and 0.334 M in NaCN. (1) If Ka for HCN is 4.0E-10, what is the pH of the buffer solution. (2) Write the net ionic equation for the reaction that occurs when 0.100 mol HI is added to 1.00 L of the bu..
Bromine is a reddish-brown liquid. Calculate its den-sity (in g/mL) if 650 g of the substance occupies 188mL.
How many grams of potassium lactate (KC3H5O3) must be added to 114.0 ml of 0.5 M lactic acid in order to prepare a buffer solution at pH 3.1? The pKa of lactic acid is 3.8.
A 75.0 mL volume of 0.200 M NH3(Kb=1.8e-5) is titrated with 0.500 M HNO3. Calculate the pH after the addition of 21.0 mL of HNO3
The blue color of dextran blue solution is due to the well-known, blue complex formed between starches and iodine. If you only had the absorption spectrum of this solution
For the reaction Cl2 + 2KBr -> 2KCl + Br2, calculate the percentage yield if 200 g of chlorine react with excess potassium bromide to produce 410 g of bromine
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