Calculating Ar and Mr

Find the relative molecular mass of  $H_2SO_4$  .

Find the relative molecular mass of $\left(NH_4\right)_2CO_3$  . Give your answer to 1dp

Find the relative molecular mass of  $MgCl_2$ 
Give your answer to 1dp

 Find the relative molecular mass of  $Fe\left(NO_3\right)_3$ . Give your answer to 1dp

Neon has 3 isotopes.

The percentage abundances of the isotopes are as follows:

Neon-20 90.92%,

Neon-21 0.26%

Neon-22 8.82%

Calculate the relative atomic mass of Neon