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What is meant by the primary structure of a protein molecule? How does it differ from the secondary structure of a protein? How are secondary protein structures held together? Discuss the importance of the tertiary and the quaternary structures of proteins. Do all proteins have primary, secondary, tertiary, and quaternary structures? Explain.
A solution of ethanol (C2H5OH) in water is prepared by dissolving 69.8 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this solution?
Combining aqueous solutions of BaI2 and Na2SO4 affords a precipitate of BaSO4. Which ion(s) is/are the spectator ions in the reaction
pure (R)-2-Methyl-2-butanol what will your product distribution of R & S alkyl halide be? Explain.
In the debye-huckel equation explaining the true activity of ions in solution, name and illustrate six terms contained therein that affect the activity, and define how they do affect it.
If a stock concentration of 0.00099 M in 0.5 H2SO4 of potassium dichromate is given. After that dilute 5mL of potassium dichromate with 20mL of H2SO4. Explain what the concentration is
A compound A(C6H6) undergoes catalytic hydrogenation over lindlar catalyst to give a compound B, which in turn undergoes ozonolysis followed by workup with aqueous H2O2 to yield succinic acid and two equivalents of formic acid.
The atoms in Barium metal are arranged in a body-centered cubic unit cell. Calculate the radius of a Barium atom if the density of barium is 3.5 g/cm3
if 500g of potassium chlorate solid decomposes and produces 303g of potassium chloride solid, how many grams of oxygen gas are produced?
the ph of a sample of rain is found to be 3.2. calculate the percentage of hso4- that is ionized in this sample given
Arrange the following solutions in order of decreasing freezing point: 0.20 m Fe(OH)2, 0.15 m C6H6, 0.10 m K3PO4, 0.15 m CH3COOH, 0.35 m KBr.
barium metal crystallizes in a body centered cubic lattice. the unit cell edge length is 502 pm and the density of the
protonated means that the drug is in its acid form (HA) and dissociated means that the drug is in its dissociated form (A-). the pH of the stomach is about 1 or 2. the pH of the blood is about 7.4. given that a drug has a pKa of 4.2.
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