Molar Mass Percent Composition
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Chemistry: Molar Mass and Percentage Composition
Calculate the molar masses and percentage composition of each of the following compounds. Show your work and always include units.
1. Ca3P2
2. Ca(OH) 2
3. Na2SO4
4. CaSO4
5. (NH4) 2SO4
6. Zn3(PO4) 2
7. Mg(NO3) 2
8. KCl
Answers: 1. 182.3 g, 66.0% Ca, 34.0% P 5. 132.1 g, 21.2% N, 6.1% H, 24.3% S, 48.4% O
2. 74.1 g, 54.1% Ca, 43.2% O, 2.7% H 6. 386.2 g, 50.8% Zn, 16.1% P, 33.1 % O
3. 142.1 g, 32.4% Na, 22.6% S, 45.0% O 7. 116.3 g, 20.9% Mg, 24.1% N, 55.0% O
4. 136.2 g, 29.4% Ca, 23.6% S, 47.0% O 8. 74.6g, 52.4% K, 47.6% Cl
Chemistry: Molar Mass and Percentage Composition KEY
Calculate the molar masses and percentage composition of each of the following compounds. Show your work and always include units.
1. Ca3P2
[pic] [pic] [pic]
2. Ca(OH) 2
[pic] [pic] [pic] [pic]
3. Na2SO4
[pic] [pic] [pic] [pic]
4. CaSO4
[pic] [pic] [pic] [pic]
5. (NH4) 2SO4
[pic] [pic] [pic] [pic] [pic]
6. Zn3(PO4) 2
[pic] [pic] [pic] [pic]
7. Mg(NO2) 2
[pic] [pic] [pic] [pic]
8. KCl
[pic] [pic] [pic]
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