Question

select the correct answer. calcium carbonate is a compound that is used to make chalk for drawing on rocks or pavement. one molecule has one atom of calcium (ca), one atom of carbon (c), and three atoms of oxygen (o). which is the correct way to write the chemical formula for calcium carbonate? a. 3caco b. ca3co c. caco3 d. ca3c3o3

Explanation:

Step1: Identify atom counts

One calcium (Ca), one carbon (C), three oxygen (O).

Step2: Write chemical formula

The formula should have Ca for calcium, C for carbon and O₃ for three oxygen atoms, giving CaCO₃.

Answer:

C. CaCO₃