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Question

What coefficient is needed for O2 to balance the following equation?
Sc+O2Sc2O3

A
0
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B
1
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C
2
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D
3
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Solution

The correct option is D 3
Oxygen is in the ration 2:3 in left and right side. Write 3 before O2 and 2 before Sc2O3, such that Oxygen is balanced.
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