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Problem- a) A chromatography experiment was carried out using powedered alumina suspended in a pipet and washed out with liquid hexane. A crude organic mixture was put on the column and the various components were washed off the column with hexane. Identify the stationary phase and the mobile phase in this chromatography experiment.
b) In a paper chromatography experiment why is it necessary to apply the spot of the mixture to be analyzed above the level of the solvent?
Please answer only if you are 100% confident
The membrane has pores equivalent in size to a spherical molecule with a molecular weight (Mm) of 120,000 daltons. The protein solution consists of albumin (40 g/L at Mm = 69,000 daltons), globulins (70 g/L at MW = 150,000 daltons), and fibrinogen..
Write the equilibrium mass balance expressions for the following equilibrium in terms of (a) KC and (b) KP.
What is the concentration of hydroxide ions in pure water at 30 degrees C, if Kw at this temperature is 1.47 x 10 to the -14th
For each of the following salt solutions, indicate whether the solution will be acidic, basic or neutral. Then using data given below, calculate [OH-] or [H3O+] and pH for each solution
Problem- Suppose that the atomic mass unit (amu) had been defined as one-tenth of the average mass of an atom of sodium instead of one-twelfth of the mass of an atom of carbon-12.
Rank PhCH3, Ph2CH2, and Ph3CH in order of acidity Rank the following compounds from most acidic to least
Explain A 30.1-g sample of Ne gas exerts a certain pressure in a container of fixed volume. Define what mass of Ar is needed to exert half the pressure at the same conditions of volume and temperature
2A(g) + 3B(g) → A2B3(g) If 0.5 atm of gas A is mixed in an evacuated reaction flask with 1.0 atm of gas B, what is the final pressure in the reaction flask? (assume that the reaction goes to completion)
Suggest mathematical functions that represent a sinusoidal wave of amplitude A, frequency v, and wavelength ? .2. Justify the mathematical form of the linear momentum operator, (-ih)d/dx, by applying in to the simple sinusoidal wave of problem 1.
A sample of 0.0020 mole of HCL is dissolved in water to make a2000-mL solution. Compute the molarity of the HCL solution, the [H3O+], and the PH. For a strong acid such as HCL, the [H3O+] is the same as the molarity of the HCL solutions.
we place an excess ( more than can dissolve) of PbCl2 into 100 ml. of water and find that at equilibrium [Cl]=0.032 M . Calculate kc for the following reaction : PbCl2 = Pb+2Cl
What and why structural features do cyanide and thiamine have in common that makes them both capable of catalyzing the benzoin condensation
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