QQuestionChemistry
QuestionChemistry
"Which equation is balanced?
A. 2Al + 3F^2 → 2AlF^3
B. Al + 3O^2 → Al^2O^3
C. Na + F^2 → 2NaF
D. Mg + 2O^2 → 2MgO"
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Answer
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Step 1: Identify the number of atoms of each element in each compound on both sides of the reaction.
For option A: - Al: 2 atoms on the left, 2 atoms on the right (balanced) - F: 6 atoms on the left, 6 atoms on the right (balanced) - Total: Balanced For option B: - Al: 1 atom on the left, 2 atoms on the right (not balanced) - O: 3 atoms on the left, 3 atoms on the right (balanced) - Total: Not balanced For option C: - Na: 1 atom on the left, 2 atoms on the right (not balanced) - F: 2 atoms on the left, 4 atoms on the right (not balanced) - Total: Not balanced For option D: - Mg: 1 atom on the left, 2 atoms on the right (not balanced) - O: 2 atoms on the left, 4 atoms on the right (not balanced) - Total: Not balanced
Step 2: Based on the analysis in Step 1, option A is the only balanced equation.
Final Answer
The balanced equation is option A: 2Al + 3F^2 → 2AlF^3.
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