Question

$\mathrm{CaO}$is the chemical formula for——— (copper oxide/calcium oxide)

Answer 1

$\mathrm{CaO}$ is the chemical formula for Calcium oxide.

$\mathrm{Ca}$ is the symbol of calcium and $\mathrm{O}$ is the symbol of oxygen. Hence, the name of the compound is calcium oxide.

• It is also known as lime or quick lime. It is a white or greyish white solid
• It is obtained by the decomposition of calcium carbonate$\left({\mathrm{CaCO}}_3\right)$
• $\underset{\mathrm{Calcium}\mathrm{Carbonate}}{{\mathrm{CaCO}}_3\left(\mathrm{s}\right)}\to \underset{\mathrm{Calcium}\mathrm{Oxide}}{\mathrm{CaO}\left(\mathrm{s}\right)}+\underset{\mathrm{Carbon}\mathrm{dioxide}}{{\mathrm{CO}}_2\left(\mathrm{g}\right)}$