Moles / Percent Composition by Mass

Moles HW 3 and 4 due by Tuesday
Mole Lab due by Wednesday
Moles & Percent Comp by Mass Celebration Wednesday
Deadline for Naming Compounds Make up Wednesday
1st Marking Period Ends Thursday
No School Friday

Moles are central to chemistry.  They involve a fair amount of math, and a lot of thinking.  This is not a topic to blow off, you will need to use moles throughout the rest of the year.  It is truly AMAZING how connected all the parts of chemistry become once you see this in action.  

And, there’s a really cool shark.


As for Percent Composition by Mass, this part is sort of like figuring out what the mass of the bananas are in a whole fruit salad by a percentage.  There are never enough bananas, so your answer can be not enough bananas, and that’s usually good for at least one point!

Get psyched, I love this part of chem.  Peace, Love, and Chemistry.

Moles Class Slideshows

Moles Paper Notes

Moles + Percent Comp BASICS

Moles Homework Assignments

Moles Lab Handout

Bubble Gum Lab

CuSO4 Lab

MgSO4 Lab

Moles + Percent Comp PACK – includes BASICS, Notes, Labs, HW’s and Handouts

Moles Class #1 ZOOM – Notes 1 – 22 – What is a mole?

Moles Class #2 ZOOM – Notes 23 – 33  – Simple mole math problems

Moles Class #3 ZOOM – Notes 34 – 39  – Two step mole math problems

Moles Class #4 ZOOM – Notes 40 – 46 – Intro to Percent Comp by Mass Problems

Moles Class #5 ZOOM – Notes 47 – 54 – Moles and Percent Comp by Mass Problems

Moles Class #6 ZOOM – Notes 55 to 62 – Review


  1.  Intro to Moles
  2. Mole Math
  3. Mole Island multi-step problems
  4. Moles Lab
  5. Percent Composition by Mass Math
  6. Bubble Gum Lab
  7. CuSO4 Lab part 1
  8. CuSO4 Lab part 2
  9. MgSO4 Lab
  10. Review
  11. Celebration of Knowledge