How many moles are in 400 grams of iron oxide fe2o3

Chemistry

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Answer

There are approximately 2.50 moles in 400 grams of iron oxide (Fe2O3).

Step-by-step solution

2 steps

Here's how to calculate it:

  1. Calculate the molar mass of Fe2O3

    • Atomic mass of Iron (Fe) = 55.845 g/mol
    • Atomic mass of Oxygen (O) = 15.999 g/mol
    • Molar mass of Fe2O3 = (2 × 55.845 g/mol) + (3 × 15.999 g/mol)
    • Molar mass of Fe2O3 = 111.69 g/mol + 47.997 g/mol
    • Molar mass of Fe2O3 = 159.687 g/mol

  2. Convert grams to moles

    • Moles = Mass / Molar mass
    • Moles = 400 g / 159.687 g/mol
    • Moles ≈ 2.50499 moles

    Rounding to three significant figures (based on 400 grams), we get 2.50 moles.

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