Friday, March 26, 2010
Mrs. Gall
Friday, March 26, 2010
Warmup- How many cheerios are in a mole of
cheerios?
2. Grade printouts.
3. Turn in today please: 4 page density worksheet, mass of
1.
a score lab, mole conversion wkst (p.1 wkst, #1-5)
4.
Given today, due Monday: Mole Sample
Problems 1,2,3 (3 handouts!) NOTES IN
CLASS: work to understand these please.
Bring your best effort on Monday. Due date
extensions may be given by request.
How many particles in a mole?
60,200,000,000,000,000,000,000,000
Also correctly written as:
6.02 x 1023
Section: Avogadro’s Number …
1. 4.00 mol x 6.02 x 1023 = 2.41 x 10 24
2. 1.55 mol x 6.02 x 1023 = 9.33 x 10 23
1 mol
3. 2.65 x 10 25 atoms x 1 mole = 44.0 moles
6.02 x 1023 atoms
70.8 moles
4.
4.26 x 10 25 molecules x 1 mole =
6.02 x 1023 molecules
5.
1.75 x 10 26 atoms x 1 mole = 291 moles
6.02 x 1023 atoms
Worksheet due in ten minutes
Avogadros number and molar conversions
Due at 8:53 am
#1-5
Worksheet has page 1 written on the bottom