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How many grams of water and iron must react to produce 543 g of iron oxide, Fe3O4?
3Fe + 4H2O---> Fe3O4 + 4H2

  • CHEM -

    You have the balanced equation.
    1. Convert 543 g Fe3O4 to moles. Moles = grams/molar mass.
    2. Using the coefficients in the balanced equation, convert moles Fe3O4 to moles of what you want (moles Fe).
    3. Now convert moles Fe to grams.
    grams = moles x molar mass.

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