Cadmium metal reacts with a solution of copper (II) sulfate to produce pure copper and a solution of cadmium (II) sulfate.

Cd(s) + CuSO4(aq) = Cu(s) + CuSO4(aq)

Explanation:

cadmium metal is a solid, so it will be labeled as Cd(s)

"reacts with a" means it is adding something: so the symbol will be "+"

copper (ll) sulfate is CuSO4, and "solution of" means it is aqueous "aq"

"to produce" means it is creating something, so instead of the "=" it would be an arrow

pure copper is labeled as Cu, and it is a solid

it repeats "solution of cadmium (II) sulfate" so it becomes CuSO4(aq)

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).