Question

. What is the oxidation state of Cr in Cr2O7^-2
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Answer 1

Answer:

+ 6

The sum of the oxidation numbers in Cr2O72-, a polyatomic ion, is -2, the charge of the ion. There are seven oxygen atoms, so the total charge is − 2⋅7 = − 14. So, a chromium atom here has an oxidation number of + 6.

Answer 2

Answer:

+6

Explanation:

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