Watch the GPB Chemistry video # 702- Percentage Composition and Empirical Formulas and take notes

http://www.gpb.org/chemistry-physics/chemistry/702

Also, if you didn’t finish today’s classwork, here it is.

CW4: % Composition – Find the % of every element in the compound.
1. copper (II) bromide
2. sodium hydroxide
3. potassium permanganate
4. magnesium phosphate
5. chlorous acid

% element = (mass element/molar mass) * 100