1. which of the following two ingredients can combine to make a compound?
a. salt and water
b. hydrogen and oxygen
c. eggs and butter
d. sugar and water

2. which of the following is a heterogeneous mixture? *
a-glue
b-honey
c-coffee
d-cereal with milk

Light waves can move through , but they travel fastest when they move through a(n) .

If c + di is a point on the circle, then | c + di |=

Achemist at a pharmaceutical company is measuring equilibrium constants for reactions in which drug candidate molecules bind to a protein involved in cancer. the drug molecules bind the protein in a 1: 1 ratio to form a drug-protein complex. the protein concentration in aqueous solution at 25 ˚c is 1.74 x10-6 m . drug a is introduced into the protein solution at an initial concentration of 2.00 x10-6m. drug b is introduced into a separate, identical protein solution at an initial concentration of 2.00 x10-6m. at equilibrium, the drug a-protein solution has an a-protein complex concentration of 1.00 x10-6m, and the drug b solution has a b-protein complex concentration of 1.40 x10-6m.a. calculate the kc value for the a-protein binding reaction.b. calculate the kc value for the b-protein binding reaction.c. assuming that the drug that binds more strongly will be more effective, which drug is the better choice for further research?