how many grams of oxygen are needed to react with 350 g of iron to produce 500 g fe 2 o 3?

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  • 4 weeks ago

    Without doing any calculations :

    500g - 350g = 150g

    Answer: 150g O2 required.

  • 4 weeks ago

    Combustion of iron ....

    4Fe(s) + 3O2(g) --> 2Fe2O3(s)

    350g .......?g ............ 500g

    Assuming that you can get exactly 500g of Fe2O3 from 350g  of Fe, the just subtract.  It's an application of the law of conservation of matter.

    But these numbers appear a bit too simple. A quick check is in order.

    350g Fe x (1 mol Fe / 55.8g Fe) x (1 mol Fe2O3 / 2 mol Fe) x (159.5g Fe2O3 / 1 mol Fe2O3) = 500.5g ..... imagine my surprise.  500g is close enough for government work.

    500g - 350g = 150g O2

  • Anonymous
    4 weeks ago

    Sounds like something YOU need to figure out.

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