1. Measure amounts of something with three different methods—
Measuring Matter
Measure amounts of something with three different methods—
by count, by mass, and by volume.
Which of these is measured by count? by mass/weight? by volume?

2. video clip – TEDEd How big is a mole (4 min)

3. 1 mole of atoms is 602,000,000,000,000,000,000,000
atoms!

4. 6.02 x 1023 particles
602,000,000,000,000,000,000,000
particles
Avogadro’s Number

7. Which weighs more?
Which has more animals?
6.02 x 1023 atoms of Ne
6.02 x 1023 atoms of C
(20 grams)
(12 grams)
Which weighs more?
Which has more atoms?
The number of grams in a mole of particles is different by substance.

9. A mole of any substance contains Avogadro’s number of particles,
or 6.02  1023 particles.
(particles = atoms, molecules, formula units,…)
Type 1
Moles Particles
## mol x 6.02 x 1023 particles = ____ particles
1 mol
Mole = Latin “pile, heap, or mass”
Type 2
Particles Moles
## x 10## particles x mol = ____ mol
6.02 x 1023 particles

10. Type 1 Moles Particles 2.12 mol x _________________ = 6.02 x 1023 1
How many molecules are in 2.12 mol of propane gas (C3H8) ?
2.12 mol x
_________________ =
6.02 x 1023
molecules ____ molecules 1
mol
1.28 x 1024 molecules
in a BOX!!!

11. Type 2
Particles Moles
_____________ = 1
mol ___ mol
1.25 x 1023 atoms x
6.02 x 1023
atoms
0.208 mol
in a BOX!!!

12. How many moles is 2.17 x 1024 molecules of Br2 ? Type 2
Particles Moles
________________ = 1
2.17 x 1024 molecules x
mol ___ mol
6.02 x 1023
molecules
3.60 mol
WS Moles & Molar Mass
#1-3
in a BOX!!!

13. How many atoms are in 1.14 mol SO3?
Moles Particles
1.14 mol x
6.02 x 1023
molecules 4
atoms
x = 1
mol 1
molecule
Type 1 (plus)
2.75 x 1024 atoms
in a BOX!!!