Com relaçao a pilha mg/mg2+//cu2+/cu, indique a: o polo positivo b: o anodo c: a reação global

A: Cu; B: Mg; C: Mg + Cu²⁺ ⟶ Mg²⁺ + Cu

Explanation:

The left-hand side of the cell diagram is where oxidation occurs (the anode).

Mg ⟶ Mg²⁺ + 2e⁻

So, Mg is the anode.

The right-hand side of the cell diagram is where reduction occurs (the cathode)

Cu²⁺ + 2e⁻ ⟶ Cu

As the copper ions hit the copper cathode, they remove electrons from the metal and become copper atoms. Since the metal has lost electrons, Cu is the positive electrode.

To get the overall reaction, we add the two half-reactions,

Mg ⟶ Mg²⁺ + 2e⁻

Cu²⁺ + 2e⁻ ⟶ Cu            

Mg + Cu²⁺ ⟶ Mg²⁺ + Cu

nuclear fission produces elements that are heavier than helium.

the elements that are used in nuclear fission and their products are much heavier than helium.

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.