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2) Calculate the superhelical density of a 5000 bp plasmid DNA containing 25 positive supercoils (of B-form DNA).
3) By what factor will a reaction at 25oC be accelerated if a catalyst reduces the activation energy of the transition state by 1 kJ/mole? Also, by 10 kJ/mole?
NaOH + CO2 -> Na2CO3 + H2O. If the average human body discharges 745 g of CO2 per day, how much NaOH is needed each day for each person in the spacecraft.
How would you synthesize Acetophenone starting from an Alkene? Identify and draw the structure of the starting compound
How many moles of urea (60. g/mol) must be dissolved in 100 g of water to give a 2.5 molal solution?
Carbonyl fluoride, , is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride
Draw the three different plates you would expect from obtaining a TLC from ibuprofen on silica gel using (a) toluene, (b) ethyl acetate, and (c) methanol as the eluting solvents
determine the net change of oxidation number of each of the elements in the redox equations.
An impure sample of sodium carbonate, (Na2CO3) is allowed to react by dissolving it in an aqueous solution of 0.134 M HCl, according to the following reaction:
An aqueous solution of nickel acetate is electrolyzed for 3 hours with a 1.8 ampere current. What mass of nickel is produced?
the pH of a saturated solution of a metal hydroxide MOH is 9.30. calculate the Ksp for the compound
suppose that a 5.0X10^-5 M solution of Ba(OH)2 is prepared. What is the pH of the solution?
What is the mol fraction Na2SO4 in a solution which is 11.5% by weight Na2SO4 (molar mass Na2SO4 = 142.06 g/mol and H2O = 18.016 g/mol)?
A solution contains 0.635g NaOH in 236 ml solution. What is the [OH-]?
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