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Answer :
To find the molar mass of aluminum chloride (AlCl₃), let's go through the steps:
1. Identify the Elements and Their Molar Masses:
- Aluminum (Al): The molar mass of aluminum is approximately 26.98 g/mol.
- Chlorine (Cl): The molar mass of chlorine is approximately 35.45 g/mol.
2. Determine the Chemical Formula:
- The chemical formula for aluminum chloride is AlCl₃. This means there is one aluminum atom and three chlorine atoms in each molecule of aluminum chloride.
3. Calculate the Molar Mass of AlCl₃:
- For aluminum: 1 atom of Al × 26.98 g/mol = 26.98 g/mol
- For chlorine: 3 atoms of Cl × 35.45 g/mol = 106.35 g/mol
4. Add the Molar Masses Together:
- Total molar mass of AlCl₃ = 26.98 g/mol + 106.35 g/mol = 133.33 g/mol
Based on the calculations, the molar mass for aluminum chloride (AlCl₃) is approximately 133.33 g/mol. Therefore, the correct answer is option b) 133.34 g/mol (rounded to two decimal places).
1. Identify the Elements and Their Molar Masses:
- Aluminum (Al): The molar mass of aluminum is approximately 26.98 g/mol.
- Chlorine (Cl): The molar mass of chlorine is approximately 35.45 g/mol.
2. Determine the Chemical Formula:
- The chemical formula for aluminum chloride is AlCl₃. This means there is one aluminum atom and three chlorine atoms in each molecule of aluminum chloride.
3. Calculate the Molar Mass of AlCl₃:
- For aluminum: 1 atom of Al × 26.98 g/mol = 26.98 g/mol
- For chlorine: 3 atoms of Cl × 35.45 g/mol = 106.35 g/mol
4. Add the Molar Masses Together:
- Total molar mass of AlCl₃ = 26.98 g/mol + 106.35 g/mol = 133.33 g/mol
Based on the calculations, the molar mass for aluminum chloride (AlCl₃) is approximately 133.33 g/mol. Therefore, the correct answer is option b) 133.34 g/mol (rounded to two decimal places).
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