Question

An unknown molecule substance X is added to a container of water, but will not dissolve in the water. substance X if therefore

A. a polar molecule
B. a nonpolar molecule
C. there is not enough information to make a prediction on the polarity of substance X

Answer 1

Substance X is a nonpolar molecule and will not dissolve in water. Hence the correct answer is option B

Step-by-step explanation:

Substance X will not dissolve in water, indicating that it is a nonpolar molecule. Nonpolar molecules do not have a charge imbalance and do not interact with the polar water molecules. This is because like dissolves like, and water being a polar solvent, it can dissolve polar substances but not nonpolar substances.

Hence the correct answer is option B

Answer 2

Answer: B. a nonpolar molecule

Water is a molecule made of two hydrogens and one oxygen. Water structure looks like a mickey mouse which makes it polar.
A polar compound will attract others polar molecules. That cause a polar substance will have much more solubility in water than non-polar substance like oil. Since the substance is not dissolved in water, it is more likely for it to be a non-polar molecule.