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How much Tris (1.0 M) (MW: 121.1 g/mol) and EDTA (0.2M) (MW: 372.2 ) solutions are used to prepare a 100ml of TE buffer (10mM Tris and 1mM EDTA)
The solution to physical chemistry, A laser used to read CDs emits red light of wavelength 700 nm. How many photons does the laser emit per second
a .50 g sample of vegetable oil is placed in a calorimeter when the sample is burned 18.9kJ are given off what is the caloric value of the oil.
NaOH required for titration of 10 mL of monoprotic acid solution. What was the original concentration of acid? What was the original pH of acid solution if its pKa is 5.3?
Why do primary alkyl halides typically undergo Sn2 substitution reactions more rapidly than do secondary or teritary alkyl halides?
A hypothetical salt AxBy crystallizes in the cubic syatem. The unit cell mass has atoms of A at each corner plus on at (1/2,1/2,/1/2) and atoms of B at positions (0,1/2,1/2).
General Chemistry: Energy, Volume, Mass, Molarity, and Moles, Benzene is an organic solvent with the formula C6H6. It boils at 80.1 degrees celcius and melts at 5.5 degrees Celsius. Benzene's density is 0.88gm/ml; its heat of vaporization is 30.0 ..
where b and R are constants. If the pressure and temperature are such that Vm = 10b, what is the numerical value of the compression factor?
Solubility in water in hexane, when mixed water and ether(diethyl ehter), why two layers will form ? Which layer will be top layer why?
Raw milk sours in 4.0 hours at 28 degrees celcius but takes 48 hours to sour in a refrigerator at 5 degrees celcius. Calculate the activation energy for the souring of milk?
A solution contained KIO3 and excess KI. 25 cm3 of this solution were acidified and the liberated I2 required 26.8 cm3 of 0.1 M Na2S2O3 for complete recaction.
A proton in a linear accelerator has a de Broglie wavelength of 138 pm. what is the speed of the proton?
At a particular temperature, N2O5 decomposes according to a first-order rate law with a half-life of 3.0 s. If the initial concentration of N2O5 is 1.0 × 1016 molecules/cm3, what will be the concentration in molecules/cm3 after 11.3 s?
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