Question

How does the Lewis model for covalent bonding account for the relatively low melting and boiling points of molecular compounds (compared to ionic compounds)?

a) Weak van der Waals forces
b) Strong covalent bonds
c) Metallic bonding
d) Ionic interactions

Answer 1

Using two identical fractional columns stacked on top of each other in the distillation process can significantly increase the efficiency of separating methanol and water.

Step-by-step explanation:

Using two identical fractional columns stacked on top of each other in the distillation process can significantly increase the efficiency of separating methanol and water. The fractional distillation process separates substances based on their boiling points, with the lower boiling point substances condensing at the top of the column and the higher boiling point substances condensing at the bottom. By using two columns, the separation process is repeated, allowing for more precise separation and enhanced efficiency.