Answer:
a. Magnesium Hydroxide (Mg(OH)2):
- Molecular mass of Magnesium (Mg) = 24.31 g/mol
- Molecular mass of Oxygen (O) = 16.00 g/mol
- Molecular mass of Hydrogen (H) = 1.01 g/mol
Molecular mass of Mg(OH)2 = (24.31 g/mol) + 2 * (16.00 g/mol) + 2 * (1.01 g/mol)
= 24.31 g/mol + 32.00 g/mol + 2.02 g/mol
= 58.33 g/mol
b. Calcium Phosphate (Ca3(PO4)2):
- Molecular mass of Calcium (Ca) = 40.08 g/mol
- Molecular mass of Phosphorus (P) = 30.97 g/mol
Molecular mass of Ca3(PO4)2 = 3 * (40.08 g/mol) + 2 * (30.97 g/mol) + 8 * (16.00 g/mol)
= 120.24 g/mol + 61.94 g/mol + 128.00 g/mol
= 310.18 g/mol
c. Sucrose (C12H22O11):
- Molecular mass of Carbon (C) = 12.01 g/mol
Molecular mass of C12H22O11 = 12 * (12.01 g/mol) + 22 * (1.01 g/mol) + 11 * (16.00 g/mol)
= 144.12 g/mol + 22.22 g/mol + 176.00 g/mol
= 342.34 g/mol
d. Iron (II) Sulfate Heptahydrate (FeSO4·7H2O):
- Molecular mass of Iron (Fe) = 55.85 g/mol
- Molecular mass of Sulfur (S) = 32.06 g/mol
Molecular mass of FeSO4·7H2O = (55.85 g/mol) + (32.06 g/mol) + 4 * (16.00 g/mol) + 7 * (2.02 g/mol)
= 55.85 g/mol + 32.06 g/mol + 64.00 g/mol + 14.14 g/mol
= 166.05 g/mol
e. Washing Soda (Na2CO3·10H2O):
- Molecular mass of Sodium (Na) = 22.99 g/mol
Molecular mass of Na2CO3·10H2O = 2 * (22.99 g/mol) + 12.01 g/mol + 3 * (16.00 g/mol) + 10 * (2.02 g/mol)
= 45.98 g/mol + 12.01 g/mol + 48.00 g/mol + 20.20 g/mol
= 126.19 g/mol
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Answers & Comments
Answer:
a. Magnesium Hydroxide (Mg(OH)2):
- Molecular mass of Magnesium (Mg) = 24.31 g/mol
- Molecular mass of Oxygen (O) = 16.00 g/mol
- Molecular mass of Hydrogen (H) = 1.01 g/mol
Molecular mass of Mg(OH)2 = (24.31 g/mol) + 2 * (16.00 g/mol) + 2 * (1.01 g/mol)
= 24.31 g/mol + 32.00 g/mol + 2.02 g/mol
= 58.33 g/mol
b. Calcium Phosphate (Ca3(PO4)2):
- Molecular mass of Calcium (Ca) = 40.08 g/mol
- Molecular mass of Phosphorus (P) = 30.97 g/mol
- Molecular mass of Oxygen (O) = 16.00 g/mol
Molecular mass of Ca3(PO4)2 = 3 * (40.08 g/mol) + 2 * (30.97 g/mol) + 8 * (16.00 g/mol)
= 120.24 g/mol + 61.94 g/mol + 128.00 g/mol
= 310.18 g/mol
c. Sucrose (C12H22O11):
- Molecular mass of Carbon (C) = 12.01 g/mol
- Molecular mass of Hydrogen (H) = 1.01 g/mol
- Molecular mass of Oxygen (O) = 16.00 g/mol
Molecular mass of C12H22O11 = 12 * (12.01 g/mol) + 22 * (1.01 g/mol) + 11 * (16.00 g/mol)
= 144.12 g/mol + 22.22 g/mol + 176.00 g/mol
= 342.34 g/mol
d. Iron (II) Sulfate Heptahydrate (FeSO4·7H2O):
- Molecular mass of Iron (Fe) = 55.85 g/mol
- Molecular mass of Sulfur (S) = 32.06 g/mol
- Molecular mass of Oxygen (O) = 16.00 g/mol
- Molecular mass of Hydrogen (H) = 1.01 g/mol
Molecular mass of FeSO4·7H2O = (55.85 g/mol) + (32.06 g/mol) + 4 * (16.00 g/mol) + 7 * (2.02 g/mol)
= 55.85 g/mol + 32.06 g/mol + 64.00 g/mol + 14.14 g/mol
= 166.05 g/mol
e. Washing Soda (Na2CO3·10H2O):
- Molecular mass of Sodium (Na) = 22.99 g/mol
- Molecular mass of Carbon (C) = 12.01 g/mol
- Molecular mass of Oxygen (O) = 16.00 g/mol
- Molecular mass of Hydrogen (H) = 1.01 g/mol
Molecular mass of Na2CO3·10H2O = 2 * (22.99 g/mol) + 12.01 g/mol + 3 * (16.00 g/mol) + 10 * (2.02 g/mol)
= 45.98 g/mol + 12.01 g/mol + 48.00 g/mol + 20.20 g/mol
= 126.19 g/mol