CK12-Foundation
https://flexbooks.ck12.org/cbook/ck-12-chemistry-flexbook-2.0/r110/
WEBJun 6, 2021 · CK-12 Chemistry for High School FlexBook® covers core chemistry concepts and includes SIMs, PLIX, real world examples, and videos. Standards Alignment: NGSS , AL , AK , (48 more)
DA: 77 PA: 82 MOZ Rank: 8 Up or Down: Up