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Calculate the ratio of the concentration of acetate and acetic acid required in a buffer system of pH=4.10. The pKa of acetic acid is 4.76.
Using the following reaction: OH- + HC2H3O2 ---> H2O + C2H3O2- a 75.0 mL sample of potassium hydroxide, KOH, of unknown concentration is titrated with 42.5 mL of 0.575 M acetic acid.
A 10.0 g sample of krypton has a temperature of 25°C at 575 mm Hg. What is the volume, in milliliters, of the krypton gas?
The average concentration of strontium ion in seawater is 8.00 mg of strontium ion per kg of seawater. What is the molarity of the strontium ion if the density of the seawater is 1.025 g/mL.
The first ionization energy of germanium is 762 kj/mol. Upon irradiation with electromagnetic radiation of a particular wavelength, the outermost electron of Ge is ejected with a velocity measured at 2.5 x 10^6 m/s. What is the wavelength of radia..
What is the mole fraction of each gas. Express your answers using four significant figures. Enter your answers numerically separated by a comma.
The concentration of Na^+ in a 0.73 M Na2CO3 solution is: (Assume complete dissaciation) A. 0.43 M B. 0.88 M C. 1.02 M D. 1.28 M E. 1.46 M
A section of membrane with an aquaporin (AQP) has a water transport rate of about 3 billion water molecules per second (3 × 109 molecules·s-1).
What wieght of glycine (pka1=2.4, pka2=9.6) and what volume of 0.5 N(normality) HCl would be necessary to make 100 mL of 0.2 M buffer pH 2.4?
Explain in your own words why an organic chemist would say structure determines properties.
in the commercial manufacture of nitric acid how many liters of nitrogen dioxide will produce 30 liters of nitric oxide
calculate the mass of propylene glycol that must be added to 0.500 kg of water to reduce the vapor pressure by 4.60
Glass cuvette, used for precision measurements in a spectrometer, are marked so that they always have the same orientation in the sample compartment. What error does this minimize and why?
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