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A protein solution is prepared utilize acetate buffer (pH 4.7). Explain how do you replace the acetate buffer with a phosphate buffer (pH 7.0) without taking drastic measures such as precipitating the protein and resuspending it in the new buffer?
An insulated tank is divided into two equal parts. Both halves contain the same ideal gas but one is at 300K and 2 bar while the other one is at 1 bar.
If 122 mL of a 1.2 M glucose solution is diluted to 550.0 mL, what is the molarity of the diluted solution?
The complete combustion of pentane releases 243 kj on the basis of this information calculate the value of delta H for the complete combustion of one mole of pentane
which concept would explain why the carbon to carbon bond lengths in benzene c6h6 are identical? ahybridization blondon
What is the theoretical yield of Ammonia if 14.29g of N and 10.85g of H are allowed to react?
What is the solubility of Ca(OH)2 in water, at the experimental temperature, in grams of Ca(OH)2 per 100 mL of solution?
Why was acetyl chloride /ethanol used as source of hydrocholic acid instead of aqueous hydrocholic acid
How many ml of 0.122 M MnO4- are required to react with an excess of C2O4^2- in order to produce 75.25 ml of carbon dioxide gas measured at 30.0 degrees C and 715 torr? MnO4- (aq) + C2O4^2- (aq) -------> MnO2 (s) + CO2 (g) Basic solution
The enthalpy of vaporization of water at 373 K and 1 bar is 40.7 kJ/mol and the molar heat capacities are 75.3 J/(mol K) for liquid and 33.6 J/(mol K) for gaseous water. Find the enthalpy of vaporization of water at 273 K and 1 bar.
consider a mixture of air and gasoline vapor in a cylinder with a piston. the original volume is 50. cm3. if the
A cell based on the reaction below has a standard potential of +0.42 V at 25°C. If all of the species are at standard conditions except [H+], at what pH will the cell have a potential of zero
Explain why is it necessary to recrystallize your product. How do you when to recrystallize a compound. If your product is not completely dry while measuring the mp, it may appear to melt at 100C. Why
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