Use the chemical reaction to answer the question.
CaCO3→CO2+CaO
A scientist heats 30 grams of calcium carbonate (CaCO3
) in the chemical reaction shown. What is the total mass of the products?
(1 point)
Responses
15 grams
15 grams
30 grams
30 grams
10 grams
10 grams
60 grams
The total mass of the products is 30 grams.
The molar mass of CaCO3 is 100.09 g/mol. When heated, CaCO3 decomposes into CO2 and CaO.
Using stoichiometry, we can find the mass of CO2 produced:
1 mol CaCO3 produces 1 mol CO2
30 g CaCO3 * (1 mol CaCO3 / 100.09 g) * (44.01 g CO2 / 1 mol CO2) = 13.2 g CO2
The mass of CaO produced would be the remaining mass after subtracting the mass of CO2 produced:
30 g - 13.2 g = 16.8 g
Therefore, the total mass of the products is 13.2 g CO2 + 16.8 g CaO = 30 g.