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+6 for Cr, -2 for each O in Cr2O72-
oxidation number for oxygen is -2 so 7 of them makes -14 in total but the compound has an overall charge of 2- so therefore +12 is required. As there are two chromium then the oxidation number for each one is +6

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8y ago
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Wiki User

13y ago

2x+(3*-2)=0

2x-6=0

x=3

x=cr ions

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Iyanuoluwa Balogun

Lvl 1
5mo ago
I love this answer better than the others you've been giving me...

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Wiki User

11y ago

Chromium takes +III oxidation state in this compound.

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Abhijith T

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2y ago
3

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Wiki User

12y ago

The oxidation number of Cr in CrO3 is +6

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11y ago

-2 for each O, +6 for each Cr

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10y ago

O.S. of Cr = +4

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11y ago

3

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13y ago

6

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Q: What is the oxidation number for Cr in Cr2O3?
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