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: 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.