According to the experimental results, which solvent provided the best separation? a. all solvents provided the same degree of separation b. distilled water c. 70% isopropyl alcohol d. 0.5% nacl solution e. 0.2% nacl solution

Which change will decrease the number of effective collisions during a chemical reaction? a. adding a catalyst b. increasing the surface area c. decreasing the temperature d. increasing the reactant concentrations e. increasing the volume of the reactants