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An ion exchange column is used to separate single-stranded polynucleotides at pH 2. A gradient of increasing salt concentration is used for elution.
(a) Discuss which type of ion exchange would work best (anion or cation)?
(b) In this same column, would you expect triadenylic acid (ApApA) or pentaadenylic acid (ApApApApA) to elute first?
required to reach the first equivalence point of a solution of citric acid (H3C6 H5O7), how many ml of NaOH are required to completely neutralize this solution
The number of lone pairs = The number of single bonds = The number of double bonds = 2. The central nitrogen atom A. Obeys the octet rule B. Has an incomplete octet. C. Has an expanded octet.
Determine which of them exhibit resonance. (In other words, which of the following molecules exhibit resonance? Note: there is more than one answer and you must choose all of the molecules in the list that exhibit resonance.)
What type of orgainc compound is responsible for the fruity flavorings found in many natural substances
Find molarity, molality, percentage composition, boiling and freezing point of a solution - What are the boiling and freezing points of the solution?
How many grams of solid sodium phosphate, Na3PO4, are needed to prepare exactly 250ml of a 0.500M Na+ solution?
Determine the molecular weight of a compound given the gas phase data: mass of 11.8 g, temperature of 39.1 C, pressure of 630 torr, volume of 1.31 L.
describe and explain the possible effects on your results of the following experimental errors or variations.
Calculate the mass of material required if 1500 calories of energy causes a change from -27 degrees fahrenheit to 91 degrees celcius and the specific heat capacity is 0.25 joules/gram-degree C.
How many neutrons are there in an atom of lead whose mass number is 208? A) 82 C) 208 E) none of them B) 126 D) 290 8. Atoms of the same element with different mass numbers are called A) ions. C) allotropes. E) isotopes. B) neutrons. D) chemical f..
While questioning him, you learn that he consumed two bottles of beer at lunch. The alcohol (ethyl alcohol/ethanol) content in a 12 oz. bottle of beer is about 5%. The man's weight is 150 lbs and he was drinking over an hour period.
Calculate the number of milliliters of stomach acid neutralized by 1 tablespoon of milk of magnesia (1 tablespoon = 3 teaspoons).
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