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Reaction for magnesium oxide

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What would be the three equations that cancel correctly for Hess Law for the following reaction for Magnesium oxide that you would have Mg(s) + 1/2 O2(g) = MgO(s) ? Would the change in heat be a negative or a positive? what would be the final net reaction? I am confused would you then have four equations

Reference no: EM13910584

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