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Describe the key experiments that supported the semi-conservative model of DNA replication in E. coli.
What are "valence electrons"? What are "core electrons"? What does each box in an orbital diagram represent?
What volume of 0.150M HClO4 solution is needed to neutralize 45.00mL of 8.80×10^-2 M NaOH?
Sotalol is a drug with beta-blocker and antiarrhythmic action. The kinetics of the metabolism of the drug were followed by concentration
Sodium carbonate reacts with silver nitrate to produce sodium nitrate and solid silver carbonate
The U.S. recommended daily allowance (RDA) of folic acid, (C19H19N7O6) is 400.0 ?g. Calculate the number of molecules in the U.S. RDA. Do not enter units.
A 50.0mL sample of 0.0240 M NH3(aq) is titrated with aqueous HCl. What is the pH after the addition of 15.0mL of 0.0600 M HCl(aq) kb of NH3= 1.8x10^-5.
The atomic absorbances were measured as 0.105 and 0.201 for Ti and Co respectively. As a reference, a standard mixture containing 2.14 g Co/mL and 1.27 g Ti/mL was prepared as well as measured to have a signal-to-signal ratio of 2.53 Ti: 1.00 Co. ..
a 16 ounce speciality coffee drink contains 254 mg caffeine. if allthe caffeine is extracted and dissolved in an equal
Problem- State the kind of intermolecular forces that would occur between the solute and solvent in magnesium bromide (ionic).
Solutions of chymotrypsin prepared for experimental purposes are stored in a dilute solution of hydrochloric acid as a "preservative." Explain.
the complete combustion of 1.043g of C9H8O in a bomb calorimeter( Ccal= 3.986 kj/c) produced an increase in temperature of 12.85C. Calculate the molar enthalpy of combustion of C9H8O, in kJ/mol.
use the appropriate relationships from the chapter of electrons in Atoms to determine the wavelength of the line in the emission spectrum of He+ produced by an electron transition from n=5 to n=2
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