The oxidizing agent is reduced as it gains electrons during the redox reaction.

The coordination number is 6 because there are six ammonia ligands coordinated to the cobalt ion.

Proteins are primarily held together by covalent bonds, particularly peptide bonds between amino acids.

Cryolite is used as a solvent in the electrolytic extraction of aluminum from bauxite.

Bases feel slippery and can turn litmus paper blue.

Ethylenediamine is a bidentate ligand because it can form two bonds with a metal ion.