7. Magnesium chloride forms a hydrated salt. When a sample of magnesium chloride is analyzed, it is found to contain
53.20 % water. Calculate the formula of this hydrate.

8. A hydrated sodium salt containing 39.7 % water is
analyzed as follows: Na 16.9%; C 17.7 %; H 6.67 %; and O 58.8 %. What is the formula of this salt?

Dot structures do not show the distribution of electrons in orbitals and take up a lot of space.

Arrow and line diagrams take up a lot of space and make it difficult to count electrons.

Written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

(re-write in your own words this is off engenuity)