(OpenStax College, Rice University) m3 (courses.lumenlearning.com) Photos taken from: shutterstock.com External Links: *How to Calculate Price per Gallon, Kevin Beck (2019) https://sciencing.com/calculate-price-per-gallon-7652736.html **SI Length and Volume Units, LumenLearning.com https://courses.lumenlearning.com/cheminter/chapter/si-lengthand-volume-units/ ***OpenStax College, Chemistry (11 March 2015) https://openstax.org/books/chemistry/pages/1-introduction