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06-12-2022
Chemistry

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Balance the chemical equations in
Questions 17-20.
17. MgO + HBr →→→→ MgBr₂.
18. N₂ + O₂
N₂O5
MgBr₂ + H₂0
19. C₂H4 + O2 CO₂ + H₂O
20. Fe + HCl → FeCl₂ + H₂
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