How many grams of CO2 are formed by complete reaction with 33.7 grams of limestone? What is the volume of CO2 at STP?

CaCO3(s)+2HCl(aq)-->CaCl2(aq)+CO(g)+H2O(l) the first 3 and all the 2's except the first one are small.

Do you know how to use moles? You can work out the number of moles of CO2, and then the mass. For the volume you need to use

PV = nRT