Calculate HRXN for the reaction: CaO(s)+CO2(g)CaCO3(s). Use the following reactions and given H's.
Ca(s)+CO2(g)+1/2 O2(g)--CaCO3(s) H=-812.8kJ
2 Ca(s)+O2(g)--2CaO(s) H=-1269.8kJ
Show work.

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

-love shrooms

you gotta add the following molecules so we can give u an answer

explanation:

ok whats the question if not i cannot you i need question and need a thing to answer