Converting Grams to Moles
Template for converting grams to mole
1 mole
Number of grams
(Given)
Formula Mass
Sample Problem:
Convert 47.5 grams of magnesium chloride to mole
Determine the formula mass of MgCl2
Element
Atomic Mass
Number of
Atoms
Total Mass
Mg
24.0
1
24.0
Cl
35.5
2
71.0
Formula Mass =
95.0
47.5 g MgCl2
1 mole MgCl2
95.0 g MgCl2
(formula mass)
= 0.500 moles MgCl2
Use the template and the sample problem above to determine the number of moles
represented by each of the following compounds. (Hint: mole = mass ÷ formula mass)
1.
2.
3.
4.
5.
36.0 grams H2O
111 grams CaCl2
505 grams KNO3
14.8 grams Ca(OH)2
32.6 grams Ba(NO3)2
6.
7.
8.
9.
10.
66.0 grams (NH4)2SO4
412 grams C13H18O2
92.0 grams NO2
84.0 grams NaOH
14.5 grams C4H10