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Balance the following equations. 

1) Na + O2 → Na2

2) H2O2 → H2O + O2 

3) Mg(OH)2 + HCl → MgCl2 + H2

4) Fe + O2 → Fe2O2

1 Answer

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Best answer

1. 4 Na + O2 → 2 Na2

2. 2 H2O2 → 2 H2O + O2 

3. Mg(OH)2 + 2 HCl → MgCl2 + 2 H2

4. 4 Fe + 3 O2 → 2 Fe2O3

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