The rate of reduction of [co(nh3)5(h2o)]3 by [cr(h2o)6] 2 is seven orders of magnitude slower than reduction of its conjugate base, [co(nh3)5(oh)]2 . for the corresponding reductions with [ru(nh3)6] 2 instead of [cr(h2o)6] 2 as the oxidant, the two reactions differ by less than a factor of 10. what do these observation suggest about the mechanisms in reductions by [cr(h2o)6] 2 and [ru(nh3)6] 2 , respectively

i think it's c. i'm not sure but i think so.

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.

alchemy hadn't scientific methods of study, appeal to mysticism and fantasy, the knowledge of chemistry and physics were modest at that time.

alchemy was - but as new rules were discovered it either changed into chemistry or it became "unscientific".