Under constant conditions, the half-life of a first-order reaction a does not depend on the initial reactant concentration b is constant c is the time necessary for the reactant concentration to drop to half its original value d can be calculated from the reaction rate constant e all of the above are correct.

In a ni-cd battery, a fully charged cell is composed of nickelic hydroxide. nickel is an element that has multiple oxidation states. assume the following proportions of the states: nickel charge proportions found 0 0.17 +2 0.3 +3 0.33 +4 0.5 (a) determine the mean of the nickel charge. enter the answer to 2 decimal places.(b) determine the cumulative distribution function of nickel charge.