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Four aldehydes and four hydrazines were used to explore hydrazone antibacterial activity in a combinatorial technique. How many reactions and antibiotic screenings would have been required to carry out this analysis in a non-combinatorial fashion? If we were interested in examining 50 different aldehydes and 50 different hydrazines, how many reactions and antibiotic screenings would be required to carry out this analysis in a non-combinatorial fashion? and how many using the combinatorial technique?
A solution of aqueous ammonia was titrated with HCL using phenolphthalein as the indicator a) is phenolphthalein an appropriate indicator for this titration? why or why not?
Monochloroacetic acid (HC2H2ClO2) is a skin irritant that is used in "chemical peels" intended to remove the top layer of dead skin from the face and ultimately improve the
A gas is flowing through a certain system. At the inlet, the pressure is 0.3 MPa and the density is 1.2kg/m^3. At the outlet, the pressure is 0.4MPa and the density is 0.2kg
A test tube containing CaCo3 is heated until the entire compound decomposes into an oxide and carbon dioxide gas. If the test tube plus contain calcium carbonate originally
Using Acid Chlorides to Prepare Aromatic Ketones, Acid chlorides are used as electrophiles in the Friedel-Crafts reaction to prepare aromatic ketones. The reaction involves
A reaction has an activation energy of 32 kj/mol. If the temperature of the reaction doubles from 45 to 90 degrees by what factor will the ratio of the rate constants, k2/k1
A student has been asked to titrate an HCl solution with a concentration of 0.35 M against an unknown concentration of NaOH solution. He found that he used 24.35 ml of HCl i
Which of the following is always true for a spontaneous process at constant temperature. A) Delta S system + Delta S surroundings = q/T B) Delta S > 0 C) Delta S = q/T D) De
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