Like water, hydrogen fluoride, HF, and ammonia, N , have relatively high boiling points. Explain.
A) Even though HF and N have ionic bonds, like water they have a strong attraction for themselves.
B) Since these are all relatively small molecules, they can compact more tightly together, and will require more energy to be separated from each other.
C) The polar molecules of each of these materials have relatively strong attractions for themselves, which translates to relatively high boiling points.
D) Since these molecules interact with each other in long chains, they have many regions of attraction and are held together relatively tightly, thus, they are harder to pull apart when boiling.
Question 2
Based on experimental evidence, John Dalton postulated that ________.
A) each element consists of indivisible, minute particles called atoms
B) atoms can be created and destroyed in chemical reactions
C) not all atoms of a given element are identical
D) atoms of different elements have the same masses
Plant cell water potential.
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