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Chemistry
Chemistry
Problem
Oxidation number of Pr in
Pr
6
O
11
\text{Pr}_6\text{O}_{11}
Pr
6
O
11
is: a.
22
6
\frac{22}{6}
6
22
b.
20
6
\frac{20}{6}
6
20
c. 3 d. 4
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