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 (x Billons x 10 thousands?)
video clip – TEDEd How big is a mole (4 min)
video clip

3. 1 mole of atoms is about 602,200,000,000,000,000,000,000
atoms!

4. 2
Avogadro’s Constant
“real” value from wikipedia: (74)×1023 

5. The mole is the amount of substance of a system which contains as many things as there are atoms in 12 gram of carbon 12; its symbol is "mol". The Avogadro constant, often designated with the symbol NA or L, has the value (74)×1023 mol−1 in the International System of Units (SI).

8. The Pacific Ocean contains approx. 1 mole of mL of water.

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

11. A mole of any substance contains Avogadro’s number of particles,
or  1023 particles.
(particles = atoms, molecules, units…)
Type 1
Moles Particles
3.0 mol x x 1023 atoms = _____ atoms
1 mol
Mole = Latin “pile, heap, or mass”
Type 2
Particles Moles
1.5 x 1024 molecules x mol of molecules = ___ mol of molecules
6.022 x 1023 molecules

12. 6.022 x 1023 molecules ___ molecules
Type 1
Moles Particles
How many molecules are in 2.12 mol of propane gas (C3H8) ?
2.12 mol x
_________________ =
1 mol
6.022 x 1023 molecules ___ molecules
1.28 x 1024 molecules

13. Type 2
Particles Moles
1 mol ___ mol
1.25 x 1023 atoms x
_____________ =
6.022 x 1023 atoms
0.208 mol

14. How many moles is 2.17 x 1024 molecules of Br2 ? Type 2
Particles Moles
2.17 x 1024 molecules x
________________ =
6.022 x 1023 molecules
1 mol ___ mol
3.60 mol

15. How many atoms are in 1.14 mol SO3?
Moles Particles
1.14 mol x x 1023 molecules
1 mol
x 4 atoms =
1 molecule
Type 1 (plus)
WS Moles & Molar Mass
2.75 x 1024 atoms