Question

CO2

NaCl
HCl
These may all be classified as
A) elements and compounds.
B) elements and molecules.
C) elements and pure substances.
D) compounds and pure substances.

Answer 1

C.ELEMENT AND COMPOUNDS

Answer 2

D) compounds and pure substances.

Step-by-step explanation:

All three items are examples of compounds and pure substances. They are not pure elements or molecules.