<span>There are 5 atoms including 1 hydrogen, 1 nitrogen, and 3 oxygen atoms.</span>
No of moles of MgCl2 = weight of MgCl2 / Molecular weight of MgCl2
Weight of MgCl2 =moles of MgCl2 x molecular mass of MgCl2
= 8.90 x 95=845.5 gm
Answer:
Fractional Distillation could be used to:
- Obtain the different fractions of a crude which may have more uses and be more useful.
- Obtain ethanol from a mixture of ethanol and water.
Fractional Distillation is used to obtain one substance from a mixture. It depends on the boiling points of the substances.
Due to the lone pair of electron present on nitrogen in ethylamine, 
it will behave as base and attack on the hydrogen of hydroxy group of acetic acid, 
which is an acid and results in the formation of conjugate acid of triethyl amine and conjugate base of acetic acid.
The reaction between triethylamine and acetic acid is shown in the attached image.
