A fictional weak base, ZaH2, reacts with water to yield a solution with an OH– ion concentration of 2.68 × 10–4 mol/L. The chemical equation for the reaction is ZaH2(aq) + H2O(l) ⇌ ZaH3+(aq) + OH–(aq). If [ZaH2] at equilibrium is 0.0997 mol/L, what is the value of Kb for ZaH2?

Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.

How do you determine the percent yield of a chemical reaction