21) Why may a drug bearing an ester group that is 'important to target binding have a limited duration of
action?
a. It fails to be absorbed efficiently from the gut.
b. The ester is hydrolysed by esterase enzymes.
c. It fails to cross the blood brain barrier.
d. It is rapidly excreted by the kidneys.

Two liquids are shaken together in a test tube to produce a mixture that quickly separates into two layers. which of the following best describes the behavior of the above pair of substances? soluble insoluble miscible immiscible

During trial 2, what allowed you to determine that aluminum was the limiting reactant? check all that apply. all of the copper dissolved. all of the aluminum dissolved. the solution turned clear. the number of grams of copper(ii) chloride used in the reaction was greater than the number of grams of aluminum. the molar ratio of copper(ii) chloride to aluminum was greater than 3: 2, the equation’s molar ratio.

What is the mass of each element in a 324.8 sample of co2