Development of the Modern Freezer. Bacteria are usually the cause of food decay, but they can't grow as well or at all in freezing temperatures, which are at 32 degrees Fahrenheit (0 degrees Celsius) or lower.
HF- polar molecule: dipole-dipole forces. There are also dispersion forces and H bond between HF. BF3- nonpolar: dispersion forces. Ar- Dispersion forces between Ar atoms.
Fluorine (F) is much more electronegative that Hydrogen (H), which means that the electrons in the HF compound will be more attracted to F than to H, giving F a partial positiâ¦ve charge and H a partial negative charge, even though the molecule is neutral overall. 3 people found this useful.