Calculate the formula mass of the following compound

Sodium oxide, ${\mathrm{Na}}_2\mathrm{O}$ (Given, Atomic mass of $\mathrm{Na}=23\mathrm{u}$; $\mathrm{O}=16\mathrm{u}$)

Calculate the formula mass of the following compound

Aluminium oxide (Given, Atomic mass of $\mathrm{Al}=27\mathrm{u}$; $\mathrm{O}=16\mathrm{u}$)

Name the following compound. Also, write the symbols/formulae of the ions present in it.

${\mathrm{CuSO}}_4$

Name the following compound. Also write the symbols/formulae of the ions present in them.

${\left({\mathrm{NH}}_4\right)}_2{\mathrm{SO}}_4$

Name the following compound. Also write the symbols/formulae of the ions present in them:

${\mathrm{Na}}_2\mathrm{O}$

Name the following compound. Also write the symbols/formulae of the ions present in them

${\mathrm{Na}}_2{\mathrm{CO}}_3$

Name the following compound. Also, write the symbols/formulae of the ions present in it.

${\mathrm{CaCl}}_2$

Write the cations and anions present, if any, in the following:

${\mathrm{CH}}_3\mathrm{COONa}$

Write the cations and anions present, if any, in the following 

$\mathrm{NaCl}$