How to calculating the molar enthalpy change for reaction

Reference no: EM13647406

In calculating the molar enthalpy change for reaction 3, why did the instructions specify to base it on moles of Mg used, rather than moles of H+ (from HCl)? Reaction 3: Mg2+(s) + 2H+(aq) yields Mg2+(aq) +H2(g)

Reference no: EM13647406

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