Percent Composition Worksheet - Central Bucks School ...
Percent Composition
Example 1: Find the percent composition of copper (Cu) in CuBr2.
Mass of Cu in the compound x 100 = Percent Composition
Total Mass of CuBr2 Compound
63.546 grams x 100 = 28.4%
223.354 grams
Percent Composition Practice
Find the percent compositions of all of the elements in the following compounds:
1) CuBr2
Cu: ___________
Br: ___________
2) NaOH
Na: ___________
O: ___________
H: ___________
3) (NH4)2S
N: ___________
H: ___________
S: ___________
4) N2S2
N: ___________
S: ___________
5) KMnO4
K: ___________
Mn: ___________
O: ___________
6) HCl
H: ___________
Cl: ___________
7) Mg(NO3)2
Mg: ___________
N: ___________
O: ___________
7) (NH4)3PO4
N: ___________
H: ___________
O: ___________
P: ___________
8) Al2(SO4)3
Al: ___________
S: ___________
O: ___________
................
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