Molar Mass Practice Worksheet
Gram Formula Mass (GFM) Practice Worksheet
Find the gfm of the following compounds (this means that you add up the masses of each of the compounds. Use the atomic masses on the reference table and round to the nearest 0.1:
1) NaBr
2) PbSO4
3) Ca(OH)2
4) Na3PO4
5) (NH4)2CO3
6) C6H12O6
7) Fe3(PO4)2
8) (NH4)2S
9) Zn(C2H3O2)2
10) AgF
Solutions to the Molar Mass Practice Worksheet:
Important note to students: The ‘mole’ is a unit commonly used to indicate a number of things about the amount of material present. I will be introducing it this week. All of the units given here are “grams per mole”, which may be abbreviated as “g/mol”, “grams/mol”, or “g . mol-1”, depending on how your teacher likes to see it written. They all mean the same thing, but it’s probably a good idea to use whatever your teacher showed you in class. Also, remember that if you don’t use units in your answer, the answer is wrong!
All answers are rounded to the nearest 0.1 grams.
1) 102.9 g/mol
2) 303.3 g/mol
3) 74.1 g/mol
4) 164.0 g/mol
5) 96.0 g/mol
6) 180.0 g/mol
7) 357.4 g/mol
8) 68.1 g/mol
9) 183.4 g/mol
10) 126.9 g/mol
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