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11 May, 17:47

How many atoms of oxygen are represented in 3Fe (NO3) 2?

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  1. 11 May, 17:58
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    There are 18. In each molecule of Fe (NO3) 2 there are 6 oxygen atoms because you have 2 nitrate (NO3) components which each contain 3 oxygen atoms. 2 x 3 = 6. Because you have 3 molecules of Fe (NO3) 2, you need to multiply 6 by 3, which gives you 18 oxygen atoms.
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