Chemical Formula or Molecular Formula

If the formula of a metallic nitrate is $\mathrm{M}{\left({\mathrm{NO}}_3\right)}_2$, then what will be the formula of the nitride of that metal?

Identify the correct sequence of relevant steps to write the formula of cupric bisulphate.

$\left(1\right)$ Writing the symbol of a negative radical as ${{\mathrm{HSO}}_4}^{2-}$.

$\left(2\right)$ Writing the symbol of a positive radical as ${\mathrm{Cu}}^{2+}$.

$\left(3\right)$ Writing the symbol of a negative radical as ${{\mathrm{HSO}}_4}^{-}$.

$\left(4\right)$ Writing the symbol of a positive radical as ${\mathrm{Cu}}^{+}$.

$\left(5\right)$ Interchanging the valencies of positive and negative radicals and writing subscripts as $1$ and $2$.

$\left(6\right)$ Interchanging the valencies of positive and negative radicals and writing subscripts as $2$ and $1$.

$\left(7\right)$ Keeping ${\mathrm{HSO}}_4$ in parenthesis.

$\left(8\right)$ Keeping $\mathrm{Cu}$ in parenthesis.

The chemical formula of calcium oxide is:

The formulae of an oxide of an element $\mathrm{M}$ is $\mathrm{MO}$. The formulae of its phosphate is

The formula of potassium chromate is 

The correct chemical formula of aluminium oxide is

Write the chemical formula of the compounds.

The correct formula of calcium hydroxide is -

The formula for calcium oxide is:

Which of the following represents a correct chemical formula? Name it.

What is the chemical formula for the compound calcium hydroxide?

The formula of sulphuric acid is _____. 

The chemical formula of the copper nitrate is _____.