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Some Basic Concepts of Chemistry
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Question
Which of the following equations is unbalanced?
A. 4Fe(s) + 3O2(g) → 2Fe2O3(s)
B. 2Mg(s) + O2(g) → 2MgO(s)
C. P4(s) + 5O2(g) → P4O10(s)
D. P4(s) + O2(g) → P4O10(s)
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