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10 July, 03:51

How many moles of Na2Cr2O7 contain 14 moles of oxygen atoms?

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  1. 10 July, 07:46
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    Usually I just multiply moles by the subscripts which works. Doesn't make it the true chemical formula, but whatever. 2 (Na2Cr2O7) Na4Cr4O14 All we care about is the oxygen. 2 (O7) = O14 So I would say 2 moles of Na2Cr2O7 contains 14 moles of oxygen.
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