Question

substances x and y are both nonpolar. if the volatility of x is higher than that of y, what is the best explanation?
xs molecules experience stronger dipole - dipole forces than ys molecules.
ys molecules experience stronger dipole - dipole forces than xs molecules.
xs molecules experience stronger london dispersion forces than ys molecules.
ys molecules experience stronger london dispersion forces than xs molecules.

Explanation:

Non - polar substances are held together by London dispersion forces. Higher volatility means easier conversion to vapor, which occurs when intermolecular forces are weaker. So if X is more volatile than Y, Y's molecules must have stronger London dispersion forces.

Answer:

Y's molecules experience stronger London dispersion forces than X's molecules.