If a concentration of e. coli exceeding 200 colonies per 100 ml of water is unsafe for swimming, tubing, or rafting, on which of the following collection days and at which of the 2 sites would it have been unsafe to swim, tube, or raft?

Which of the following statements is false regarding aromaticity? a. the compound must be cyclic b. the compound must be fully conjugated c. the compound must be planar d. the number of electrons in the pi system must satisfy the hückel 4n+2 rule e. the compound must have a neutral charge

Reaction rate depends on how many molecules are coming into contact with each other with enough energy to react. increasing the temperature of the reactants will increase -

According to periodic trend, which of the following most likely has the highest ionization energy? kr be ni sc