Cracking the SAT Chemistry Subject Test
average kinetic energy.
- B Molecules that exhibit hydrogen bonding contain one or more
hydrogen atoms (H) bonded to either N, O, or F. The partial positive end of
one molecule (the H end) will become attracted to the partial negative end
of a nearby molecule (in this case, the N end), creating a hydrogen bond.
Choice (B) is correct.
- C A substance with a low vapor pressure doesn’t evaporate readily
because it possesses relatively strong intermolecular attractions, so
eliminate (A) and (D). What would be the result of strong intermolecular
forces? Recall that these must be overcome for a substance to boil. If they
are strong, boiling will occur only at relatively high temperatures. Choice
(C) is correct.
