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Question
An element X is trivalent. Write the balanced equation for the combustion of X in oxygen.
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Solution
Valency of X is 3+ and that of Oxygen is 2-
The following formula can be obtained by shifting the valency number and moving it to the lower right side of the atom or radical: X2O3
The equation for the combustion of X in oxygen:
\[\ce{4X + 3O2 ⟶ 2X2O3}\]
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