Question

this passage describes a chemical reaction. read the passage. then, answer the question below.

if you visit a cave, you may notice icicle - shaped rocks called stalactites hanging from the cave’s ceiling. stalactites form when water that contains minerals drips from the cave’s ceiling. the dripping water leaves behind deposits of limestone, which is made mostly of calcium carbonate (caco₃). calcium carbonate forms, along with carbon dioxide gas (co₂), when calcium bicarbonate (cah₂c₂o₆) in the water breaks down. the limestone deposits build up over thousands of years, eventually forming stalactites.

in the chemical reaction described in the passage, which of the following are products?
select all that apply.

calcium bicarbonate (cah₂c₂o₆)
carbon dioxide (co₂)
calcium carbonate (caco₃)

Explanation:

In a chemical reaction, reactants are the substances that undergo change, and products are the substances formed. The passage states that calcium bicarbonate ($\ce{CaH_{2}C_{2}O_{6}}$) breaks down to form calcium carbonate ($\ce{CaCO_{3}}$) and carbon dioxide ($\ce{CO_{2}}$). So calcium bicarbonate is a reactant, while calcium carbonate and carbon dioxide are products.

Answer:

B. carbon dioxide ($\ce{CO_{2}}$), C. calcium carbonate ($\ce{CaCO_{3}}$)