Writing Chemical Formulae

Determine the chemical formula of magnesium chloride.

The chemical formula of magnesium chloride is $\mathrm{MgCl}$.

In magnesium chloride the anion has one unit of negative charge and the cation has _____ (one/two) unit(s) of positive charge.

Identify the cation and anion present in magnesium chloride.

The chemical formula of magnesium chloride is:

What is the chemical formula of hydrogen chloride. Write the steps involved to determine it.

Identify the cation and anion present in hydrogen chloride.

The chemical formula of hydrogen chloride is:

Valency of hydrogen in hydrogen chloride is _____(one/two).

The chemical formula of hydrogen chloride is ${\mathrm{HCl}}_2$.

Which anion is present in sodium nitrate?

The chemical formula of sodium nitrate is ${\mathrm{NaNO}}_2$.

The chemical formula of sodium nitrate is _____.

Write down the cation and anion present in the sodium nitrate.

Write the chemical formula of sodium nitrate.

$$\begin{gathered} \mathrm{A}: {\mathrm{NaNO}}_3 \\ \mathrm{B}: {\mathrm{NaNO}}_2 \\ \mathrm{C}: {\mathrm{NaNO}}_4 \end{gathered}$$

(Enter your correct answer as $\mathrm{A}, \mathrm{B} \mathrm{or} \mathrm{C}$)

Calcium nitrate and potassium sulphate are both used as fertilisers. If too much of them are used, then they can pollute the environment. Which statement about these two substances is true? 

Identify the name and find the relative formula mass of the following compound:

${\mathrm{MgCO}}_3$

Identify the name and find the relative formula mass of the following compound:

${\mathrm{SF}}_4$

Identify the name and find the relative formula mass of the following compound: 

${\mathrm{SiO}}_2$

Identify the name and find the relative formula mass of the following compound: 

${\mathrm{CaBr}}_2$