Question

A sample of CaCO3 was heated, causing it to form CaO
and CO2 gas. Solid CaO remained behind, while the CO2
escaped to the atmosphere. If the CaCO3 weighed 612 g
and the CaO weighed 343 g, how many grams of CO2 were
formed in the reaction?

Is the answer 269 grams of CO2?

Answer 1

yes. Good work.