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  • Oxygen Atoms in Aluminum Carbonate: A Step-by-Step Calculation
    Here's how to solve this problem:

    1. Find the molar mass of aluminum carbonate (Al₂(CO₃)₃):

    * Aluminum (Al): 26.98 g/mol

    * Carbon (C): 12.01 g/mol

    * Oxygen (O): 16.00 g/mol

    * Molar mass of Al₂(CO₃)₃ = (2 * 26.98) + (3 * 12.01) + (9 * 16.00) = 233.99 g/mol

    2. Calculate the moles of aluminum carbonate:

    * Moles = mass / molar mass

    * Moles = 47.6 g / 233.99 g/mol = 0.203 moles Al₂(CO₃)₃

    3. Determine the moles of oxygen atoms:

    * Each mole of Al₂(CO₃)₃ contains 9 moles of oxygen atoms.

    * Moles of oxygen = 0.203 moles Al₂(CO₃)₃ * 9 moles O / 1 mole Al₂(CO₃)₃ = 1.83 moles O

    4. Convert moles of oxygen to atoms of oxygen:

    * Avogadro's number: 6.022 x 10²³ atoms/mol

    * Atoms of oxygen = 1.83 moles O * 6.022 x 10²³ atoms/mol = 1.10 x 10²⁴ atoms O

    Therefore, there are approximately 1.10 x 10²⁴ atoms of oxygen in 47.6g of aluminum carbonate.

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