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If you started with the nicked molecule, added ethidium bromide, ligated the molecule to be a closed circle, and then removed the ethidium bromide, would the molecule have positive supercoils, negative supercoils, or no supercoils? Explain.
How many grams of Cu and what volume of O2 gas will be obtained if 18.4 ampere electric current is passed through the electrolytic cell of CuSO4for 1 hour and 42 minutes between graphite electrodes at 208 K temperature and 1 bar pressure? (Cu=63.5..
Create a procedure you can use to prepare a series of solutions to determine the molar absorptivity of a food dye
The resulting equilibrium solution has a pH of 10.21. What is the Ksp of the salt at 22 °C?
The concentration of Pb2+ in a commercially available standard solution is 1.000 mg/mL. What volume of this solution should be diluted to 6.0 x 10^2 mL to produce a solution in which the concentation of Pb2+ is 0.0505 mg/L? in Homework Help
Compared to benzene, would each of the following compounds be more or less reactive than benzene in an electrophilic aromatic substitution reaction
Calculate the percent by mass of aluminum in the sample. The vapor pressure of water at 20 degree C is 17.5 Torr.
Water boils at approximately 366.9K at Lake Tahoe (P=0.809 bar). The boiling point temperature can be increased by dissolving a solute in the water. At what mole faction H2O would the boiling point of the aqueous solution be raised to 373.15 K at Lak..
the concentrations in this system were found to be [N2]=[O2]=0.100 M and [NO]=0.500 M. N2(g)+O2(g)2NO(g) If more NO is added, bringing its concentration to 0.800 M, what will the final concentration of NO be after equilibrium is re-established?
What error will this cause in their determination of the amount of iron in the table?
A 91 gram solution of silver nitrate contains 8 grams of AgNO3. What is the percent by mass of silver nitrate in this solution.
a sample of a compound containing only magnesium and oxygen is found to have 194g Mg and 256g of O. What percentages of Mg and O in this compound?
A buffer solution of pH of 9.25 contains P mol of a weak base and Q mol of a salt of its conjugate acid. When 120 cm3 of a 0.0140 mol.dm-3 solution of hydrochloric acid was added to this buffer solution
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