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Tris base (pka =8.1 ; ka = 8.32 e-9) was dissolved in 0.5l of water to give the final concentration of 1 M. a.) find pH of the obtained solution. b.) how much does the pH change after addition of 1 ml of 10N HCl?
Protons can be accelerated to speeds near that of light in particle accelerators. Estimate the wavelength (in nm) of such a proton moving at 2.90 X 108 m/s. (Mass of a proton=1.673 X 10-27 kg)
Draw a flow chart that illustrates how you would purify an organic compound that is contaminated with inorganic solids that are water soluble
distilled Solution D: 9.08 (m/v) glucose Solution E: 5.0 (m/v) glucose and 0.9 (m/v) Where does each solution go under 1. Crenation, 2. Hemolysis, 3. Neither. Each solution should be placed under one of the 3 named.
a gas made up of homonuclear diatomic molecules escapes through a pinhole .533 times as fast as ne gas. write the
A solution of 75.0 g of benzene (C6H6) and 75.0 g of toluene (C7H8) has a total vapor pressure of 80.9 mmHg at 303 K. Another solution of 100.0 g benzene and 50.0 g toluene has a total vapor pressure of 93.9 mmHg at this temperature.
Copper has two naturally occurring isotopes,63Cu (isotopic mass 62.9396 amu) and 65Cu (isotopic mass 64.9278 amu). If copper has an atomic mass of 63.546 amu, what is the percent abundance of each isotope?
What is the purpose of a hot filtration in a recrystallization. When would a hot filtration step not be necessary or useful in a purification by recrystallization? What experimental observation of the hot solution would let you know that it was no..
Earth's ocean contain 3.5*10^8 mi^3 of water and cover an area of 1.4*10^8 mi^2. What is the volume of the ocean in cubic kilometers
If the reaction of 0.650 g of rhodium(III) sulfate with excess sodium hydroxide produces 0.320 g of rhodium(III) hydroxide, what is the percent yield
The vapor pressure of water at this temperature is 23.76 Hg. The piston is depressed at constant temperature so that the gas is compressed to a volume of 2.67 L. What is the vapor pressure in the compressed gas mixture
What was your melting point of your impure and recrystallized acetanilide? What does this tell you about the sucess of your purification?
briefly discuss interpretations of your observations and results. discuss how your observations illustrated
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