Answer:To determine the grams of carbon dioxide formed when calcium carbonate reacts to form calcium oxide, we need to use the law of conservation of mass. According to this law, the total mass of reactants must equal the total mass of products in a chemical reaction.
Given: Mass of calcium carbonate (CaCO3) = 25.4 grams Mass of calcium oxide (CaO) = 14.2 grams
To find the mass of carbon dioxide (CO2) formed, we can calculate the mass difference between the reactants (CaCO3) and the product (CaO).
Mass of carbon dioxide (CO2) = Mass of reactants (CaCO3) - Mass of product (CaO)
Mass of carbon dioxide (CO2) = 25.4 grams - 14.2 grams Mass of carbon dioxide (CO2) = 11.2 grams
Therefore, 11.2 grams of carbon dioxide must simultaneously be formed.