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Phoenix [80]
4 years ago
6

What is the oxidation number assigned to manganese in KMnO4? (1) +7 (3) +3 (2) +2 (4) +4

Chemistry
2 answers:
telo118 [61]4 years ago
6 0
Oxygen's oxidation number is -2 here, so we have -8.
Potassium is a group 1 element, therefore it has a oxidation number of +1. Therefore, Manganese's oxidation number must balance out +1 + -8 = -7. Therefore, Manganese's oxidation number is (1) +7
SSSSS [86.1K]4 years ago
4 0
Let x be the oxidation of manganese.

We already know that the oxidation number of K is +1, of O is -2.

Because the compound is neutral, we have:
+1 +x + (-2)*4 = 0 (for we have 4 oxygens)

Now solve for x:
+1 +x -8 = 0
⇒ (+1 -8) +x = 0
⇒ -7 +x = 0
⇒ (-7 +7) +x = 0 +7
⇒ x = +7

The oxidation number of manganese in KMnO4 is +7.

Hope this helps~
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8 0
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Answer:

hello your question is incomplete the options are missing

Determine the resultant velocity for the plane when it is travelling

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answer :i)  270 i

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Explanation:

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