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OpenStudy (anonymous):
Determine the empirical formula of an oxide of iron which has 69.9% iron and 30.1% dioxygen by mass.
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OpenStudy (unklerhaukus):
divide the relative masses by there atomic weights and they will be in the right proportion
OpenStudy (anonymous):
|dw:1335451550534:dw| how do i proceed now and do i need to take 16g or 32g for dioxygen. I think its 32 but i have solutions with me where they take 16g
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