Percent Composition Worksheet II

[Pages:4]Percent Composition Worksheet II

Name ________________________ Date _____________ Block ______

Find the percent compositions of all of the elements in the following compounds:

1) CuBr2

2) NaOH

Cu: ___________ Br: ___________

3) (NH4)2S

Na: ___________ O: ___________ H: ___________

4) N2S2

N: ___________ H: ___________ S: ___________

N: ___________ S: ___________

5) KMnO4 6) HCl 7) Mg(NO3)2 8) (NH4)3PO4 9) Al2(SO4)3

K: ___________ Mn: ___________

O: ___________

H: ___________ Cl: ___________

Mg: ___________ N: ___________ O: ___________

N: ___________ H: ___________ O: ___________ P: ___________

Al: ___________ S: ___________ O: ___________

Percent Composition Worksheet - Solutions

Find the percent compositions of all of the elements in the following compounds:

1) CuBr2

Copper (II) Bromide Cu: 28.45%

Br: 71.55%

2) NaOH

Sodium Hydroxide Na: 57.48% O: 39.99% H: 2.53%

3) (NH4)2S

Ammonium Sulfide N: 41.1% H: 11.8% S: 47.1%

4) N2S2

Dinitrogen disulfide N: 30.4% S: 69.6%

5) KMnO4

Potassium permanganate K: 25%

Mn: 35% O : 40%

6) HCl 7) Mg(NO3)2 8) (NH4)3PO4 8) Al2(SO4)3

H: 3% Cl: 97%

Mg: 16% N: 19% O: 65%

N: 28% H: 8%

O: 43% P: 21%

Al: 16% S: 28% O: 56%

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