Dilutions You need to do three-fold, 1:30 serial dilution of a 2 M solution of NaOH. What is the concentration of [OH^ + ] in the third solution? ["Three-fold" means dilute the solution three times.)

what is that what we should be do

the answer would be a

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).