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    Hi I've got this exam question that I need to answer and I'm unsure how:

    The percentage of iron in iron oxide = 70%
    Calculate the mass of iron that could be extracted from 1000kg of iron oxide.

    Could someone explain to me how to work it out.
    Thank you if you can help me.
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    (Original post by becca_1234)
    Hi I've got this exam question that I need to answer and I'm unsure how:

    The percentage of iron in iron oxide = 70%
    Calculate the mass of iron that could be extracted from 1000kg of iron oxide.

    Could someone explain to me how to work it out.
    Thank you if you can help me.
    0.7*1000 is it not?
 
 
 
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