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Which of the following equations are balanced? Balance those that need it.a. CaC₂+2 H₂O→Ca(OH)₂+C₂H₂ b. C₂H₈N₂+2 N₂O₄→2 N₂+2 CO₂+4 H₂Oc. 3 MgO +2 Fe→Fe₂O₃+3 Mgd. N₂O→N₂+O₂
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