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.