Use bond energies to calculate the enthalpy change for the following reaction.
h2(g) + co2(g) ⟶ h2o(g) + co(g)

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Achemist reacted 57.50 grams of sodium metal with an excess amount of chlorine gas. the chemical reaction that occurred is shown. na + cl2 → nacl if the percentage yield of the reaction is 86%, what is the actual yield? show your work, including the use of stoichiometric calculations and conversion factors.