Question

3. The chemical equation shows CaCO3 being heated. Which of these statements
best describes the mass of the products if 100 g of CaCO3 is heated?
A. The difference in the products' masses is equal to the mass of the CaCO3.
B. The sum of the products' masses is less than the mass of the CaCO3.
C. The mass of each product is equal to the mass of the CaCO3.
D. The sum of the products masses equals the mass of the CaCO3.

Answer 1

Answer:

B

Explanation:

CO2 is being gas liberate some energy so when the product is form it loose some mass

Answer 2

The correct option is D.

• On heating $CaCO_3$ or calcium carbonate produces CaO and $CO_2$.
• The reaction is-
• $CaCO_3\rightarrow CaO+CO_2$
• The mass of $CaCO_3$ is 100 gram.
• So, according to the law of conversion of mass the mass of reactant is equal to the mass of product.
• Thus the sum of the products masses equals the mass of the $CaCO_3$.