I don\'t understand this. 0 Assignment 19 ChapRedox Reactions and Activity Serne

Question

I don't understand this.

0 Assignment 19 ChapRedox Reactions and Activity Sernes - Mozilla Fieefox a https//session masteringchemistry.com/myct/ftemViewroffset-n K Assignment 19 Chap 4: Redox Reactions and Activity Series Problem 4.50 Enhanced - with Feedback 96668380 150% 3 of 8 > Constants | Periodic Table Part A Determine the oxidation number (oxidation state for the indicated element in each of the following Co in LiCoO Express your answer as an integer. You may want to reference (Pages 137-144) Section 4.4 while completing this problenm Incorrect: Try Again; 9 attempts remaining Part B Sh Alt G

Explanation / Answer

suppose the oxidation number of Co is x

oxidation number of Li is +1 as it lies in the first column and oxygen have -2 oxidation number so two molecules of oxygen will have -4 oxidation number.

+1 + x + (-4) = 0 (because the overall net charge on the compound is zero)

x-3 =0

x = 3

hence oxidation state of Co is +3

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