Web Surf (8th Grade): Chemical Formulas

Part 1: Chemical Formulas and Equations

http://boomeria.org/chemtextbook/cch4.html

Part 2: Balancing Chemical Equations

https://www.khanacademy.org/science/chemistry/chemical-reactions-stoichiome/balancing-chemical-equations/v/balancing-chemical-equations-introduction

Part 3: Anatomy of a Chemical Equation

http://lc.brooklyn.cuny.edu/smarttutor/corc1322/Equations.html