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A solution buffered at pH 6.5 contains 0.5 mM Histidine, 1.0 mM Arginine, 0.1 mM lysine, and 0.7 mM Tyrosine was loaded onto an anion-exchange column and completely washed with a pH 6.5 buffer. Which amino acid came off the column first? A) Arg B) Lys C) Tyr D) His E) None, all would be retained on the column at pH 6.5
calculate the amount of energy required in calories to heat 145g of h2o from 22.3 degrees c to 75.0 degrees c.
1.75 moles of an ideal gas, for which Cv,m =3R/2, initially at 32.0 C and 2.50*10^6 pa undergoes a two-stage transformation. For each of the following states described in the following list, calculate the final pressure, as well as q, w, ?U, and ?..
An antacid tablet containing magnesium hydroxide as an active ingredient requires 22.6 mL of 0.597 M HCl for complete neutralization. What mass of Mg(OH)2 did the tablet contain?
How many ATPs are synthesized for every cytoplasmic NADH that participates in the glycerophosphate shuttle in insect flight muscle?
The enthalpy of formation is carbon monoxide is difficult to determine experimentally because it is difficult to burn carbon without producing carbon dioxide as well as carbon monoxide
What would the theoretical yield in moles be and how would you calculate that? What would the theoretical yield in grams be and how would you calculate that?
What is the value of work (w) when a piston of volume 0.2 L expands against an external pressure of 200 kPa to a volume of 3.4 L?
If oxygen gas is collected over water at 60 degree C and 1.10 atm, what is the partial pressure of the O2?
Write the balanced net ionic equation for the reaction that occur in the following case. Ba(NO3)2 (aq) + K2SO4(q) Express your answer as a balanced net ionic equation.
Henry's constant for CO in water at 25 degrees Celsius is 9.71 x 10^-4 mol/L atom. How many grams of CO will dissolve in 1.00 L of water at a CO partial pressure of 2.75 atm
Circles, blocks, and triangles represent atoms.
Calculate the amount of heat trasnferred when 3.55 g of Mg(s) reacts at constant pressure. 2Mg(s) + 02(g) ---> 2MgO(s) heat= -1204kJ
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