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Write the balance chemical reaction:1. Na + O2→ Na2O 2 ...

Fe + O2→ Fe2O3 5. Al(OH)3→ Al2O3 + H2O 6. NH3 + CuO→ Cu + N2 + H2O 7. Al2(SO4)3 + NaOH→ Al(OH)3 + Na2SO4 8. HNO3 + Ca(OH)2→ Ca(NO3)2 + H2O 9.

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