Mole Calculation Worksheet - 2015 Page 9
ADVERTISEMENT
1
2
3
4
5
6
7
8
9
10
11
12
13January 29, 2015
Formula Mass vs. Molar Mass
• Molecular Mass/Formula
Mass: If you have a single
molecule, the mass is measured in amu instead of
grams
> Is the same numerical value as 1 mole of
molecules
> Only the units are different (amu vs. grams/M)
• THE POINT: You may hear any of these terms
which mean the SAME NUMBER… just different
units
Molar Mass
• Example: Calculate the molar mass of CaCl
2
• CaCl
has 1 Calcium atom and 2 Chlorine atoms
2
• So we look up the masses of calcium and
chlorine on Periodic Table
1 Ca = 40.1 g/M
MAKE SURE TO
+ 2 Cl = (35.5 g/M) × 2
MULTIPLY CHLORINE'S
MASS BY TWO
CaCl
= 111.1 g/M
2
REMEMBER:
• The units for molar mass are grams/Mole
ADVERTISEMENT
0 votes
Related Articles
Related forms
Related Categories
Parent category: Education