Semester exam questions! oof!

1. given the following equation: n2 (g) + 3 h2 (g) ↔ 2nh3 (g) δh = -92 kj/mol
a. is this reaction exothermic or endothermic?
b. what direction will the equilibrium shift if nitrogen gas is removed?
c. what direction will the equilibrium shift if the temperature is lowered?
d. what direction will the equilibrium shift if ammonia (nh3) is added?
e. what principle you answer b-d?

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false

The solid xy decomposes into gaseous x and y: xy(s) m x(g) + y(g) kp = 4.1 (at 0 °c) if the reaction is carried out in a 22.4 l container, which initial amounts of x and y will result in the formation of solid xy?

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?