20 chemical equations questions and answer with balancing the chemical equation
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1. 3N + H2 - 2NH3
2. C + O2 - CO2
3. BaCl2 + Na2SO4 - BaSO4 + 2NaCl
4. Fe2O3 + 2Al - Al2O3 + 2Fe
5. Ca + O2 - CaO2
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