Write the formula of magnesium bromide. You can use the following table:

 

Write the formula of potassium nitrate. You can use the following table:

Write the formula of zinc carbonate. You can use the following table:

Say whether the given equation is balanced or not.

${\mathrm{CaCO}}_3\to \mathrm{CaO}+{\mathrm{CO}}_2$

Say whether the given equation is balanced or not.

$\mathrm{Na}+{\mathrm{H}}_2\mathrm{O}\to \mathrm{NaOH}+{\mathrm{H}}_2$

Say whether the given equation is balanced or not.

${\mathrm{CH}}_4+{\mathrm{O}}_2\to {\mathrm{CO}}_2+{\mathrm{H}}_2\mathrm{O}$

Say whether the given equation is balanced or not.

$\mathrm{Mg}+{\mathrm{H}}_2{\mathrm{SO}}_4\to {\mathrm{MgSO}}_4+{\mathrm{H}}_2$