Answer: the unshared pair of electrons on the nitrogen can accept a proton
Explanation:
According to the Lewis concept, an acid is defined as a substance that accepts electron pairs and base is defined as a substance which donates electron pairs.
Amines have a general molecular formula of 
which has lone pair of electrons on nitrogen and thus is able to donate electrons to a lewis acid which is short of electrons. In other words nitrogen can accept a proton.
Reactivity is not a physical property because it's a characteristic of a chemical element or compound and is involved in chemical process.
Answer:
Wind
Explanation:
It's impossible for them to travel in a wave.
I believe that number 27 is A
Answer:
d
Explanation:
sugar molecules are being broken down
