EAS349H1 Lecture 2: EAS349 Lecture Report 2

2 Σ.on (Sec. 9.9) (2 points) 2 13. Find th e sum n=1

Prove that if n > 4 is not a prime, then at least three of the n-th roots of unity are 21. not primitive n-th roots.

We introduced a new term this week to describe solvents, "protic" and "nonprotic" or "aprotic". A protic solvent is one that is capable of acting as a hydrogen bond donor, i.e. is has either an O-H or an N-H bond. Shown below are several solvents you will meet in lecture and lab this semester. Identify each one as "protic" or "aprotic" (aprotic and nonprotic are the same thing).