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The combustion reaction of Mg +1/2 O2-->MgO produces a very bright white flame and high heat. Verify that the following reactions produce the same overall reaction:

a) MgO+2HCl-->MgCl2+H2O
b) Mg+2HCl-->MgCl2+H2
c) H2+1/2O2-->H2O ΔH°= -285.8 KJ/mol

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