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    Chemistry Help-Hess Law?

    I'm not sure if I balanced this equation correctly. Can someone please check it for me? I need them to be correct so I can correctly do the other questions that follow. If incorrect, will you please provide me with the correct answer? Thanks. 1) CaCO3(s) > CaO(s)+CO2(g) a) CaCO3+1206.9KJ >...
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