The substance present in the smallest amount in a solution is the solute; it is the substance that is dissolved. While the solvent is the substance present in the largest amount in a solution, it is the substance that does the dissolving. A solution is a homogeneous mixture formed when one substance dissolves in another.
Answer:
Calcium carbonate reacts with hydrochloric acid to form carbon dioxide gas. 2HCl (aq) + CaCO 3(s) CaCl 2 (aq) + CO 2(g) + H 2 O (l).
The number of electrons in a completely filled second shell of an atom is 8.
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