Which of the following solutions would not be expected to exist? Group of answer choices NaCl in CCl4 (carbon tetrachloride, a nonpolar solvent) Pentane, C5H12, in CCl4 Methyl alcohol, CH3OH, in water NaCl in water Vegetable oil in mineral oil

NaCl in CCl4 (carbon tetrachloride, a nonpolar solvent)

Explanation:

In chemistry, polar substances are only dissolved by polar solvents while nonpolar substances are dissolved by nonpolar solvents. Ionic substances can only be dissolved by polar solvents. This implies that it is impossible for sodium chloride to dissolve in carbon tetrachloride (a nonpolar solvent).

Dissolution of a substance in a solvent depends on interaction between the solute and the solvent. That interaction depends solely on the nature of the intermolecular forces holding the solute and solvent molecules together. In chemistry we summarize this observation in the words; ' like dissolves like'. Sodium chloride can only dissolve in a polar solvent such as water and not carbon tetrachloride.

Minimizes heat transfer

Explanation:

To keep my lunch from getting cold at the beach, a material the minimizes heat transfer will be the most desirable.

Such material should be modified to prevent had transfer by convection, conduction and radiation. This kind of material is desirable because heat generally flows from a place of high amount to that of low amount. Since the food will mostly have a temperature higher than the ambient one, it is expected that heat will flow away from the food to the environment. This will make the food cold. If such heat transfer is prevented, then, the food will remain hot.