The molar mass of boric acid (H₃BO₃) is calculated by summing the atomic masses of each element in the compound, multiplied by their respective quantities.
Steps to Calculate Molar Mass of Boric Acid (H₃BO₃)
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Identify the chemical formula: Boric acid's chemical formula is H₃BO₃. This tells us that one molecule contains 3 hydrogen atoms (H), 1 boron atom (B), and 3 oxygen atoms (O).
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Find the atomic masses of each element: You can find these values on the periodic table:
- Hydrogen (H): approximately 1.01 g/mol
- Boron (B): approximately 10.81 g/mol
- Oxygen (O): approximately 16.00 g/mol
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Multiply the atomic mass of each element by the number of atoms of that element in the formula:
- Hydrogen: 3 atoms * 1.01 g/mol = 3.03 g/mol
- Boron: 1 atom * 10.81 g/mol = 10.81 g/mol
- Oxygen: 3 atoms * 16.00 g/mol = 48.00 g/mol
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Add the results from the previous step:
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- 03 g/mol (H) + 10.81 g/mol (B) + 48.00 g/mol (O) = 61.84 g/mol
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Therefore, the molar mass of boric acid (H₃BO₃) is approximately 61.84 g/mol. The reference provided an incorrect molar mass of 62 g/mole. While close, it is essential to use accurate atomic weights for precise calculations.
