Chemistry
posted by danny123 .
Given the balanced equation representing a reaction:
Cao(s) + CO2(g) > CaCO3(s) + heat
What is the total mass of CaO(s) that reacts completely with 88 grams of CO2(g) to produce 200. grams of CaCO3(s)?
I don't understand what you have to do.

This is a stoichiometry problem. Here is a solved example of such a problem. Just follow the steps.
http://www.jiskha.com/science/chemistry/stoichiometry.html 
112 grams

its 112g
because if you need a total of 200 and they already tell you that the co2 is 88, then subtract 88 from 200 to get 112