Answer :

Final answer:

There are approximately 1.826 moles in 625 grams of aluminum sulfate (Al₂(SO₄)₃).

Explanation:

To calculate the number of moles in 625 grams of aluminum sulfate (Al₂(SO₄)₃), we need to follow these steps:

  1. Calculate the molar mass of aluminum sulfate (Al₂(SO₄)₃).
  2. Use the formula Moles = Mass (g) / Molar Mass (g/mol) to calculate the number of moles.

Step 1: Calculate the molar mass of aluminum sulfate (Al₂(SO₄)₃):

  • Aluminum (Al) has a molar mass of 26.98 g/mol.
  • Sulfur (S) has a molar mass of 32.07 g/mol.
  • Oxygen (O) has a molar mass of 16.00 g/mol.

Aluminum sulfate (Al₂(SO₄)₃) contains 2 aluminum atoms, 3 sulfur atoms, and 12 oxygen atoms.

Molar mass of aluminum sulfate (Al₂(SO₄)₃) = (2 * molar mass of aluminum) + (3 * molar mass of sulfur) + (12 * molar mass of oxygen)

= (2 * 26.98 g/mol) + (3 * 32.07 g/mol) + (12 * 16.00 g/mol)

= 342.15 g/mol

Step 2: Calculate the number of moles:

Moles = Mass (g) / Molar Mass (g/mol)

Moles = 625 g / 342.15 g/mol

Moles ≈ 1.826 moles

Learn more about calculating moles from mass here:

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