Question

Classify each substance correctly according to type (mixture, element, compound):

a) O3
b) H2O
c) air

Answer 1

Ozone (O3) is classified as a molecular element because it's composed of only oxygen atoms in a molecule. Water (H2O) is a compound since it consists of hydrogen and oxygen atoms in a fixed ratio. Air is a homogeneous mixture because it contains a uniform distribution of different gases.

Step-by-step explanation:

To classify each substance as an element, a compound, a homogeneous mixture, or a heterogeneous mixture, we need to understand their composition:

• Ozone (O3) is a molecular element because it consists of only one type of element, oxygen, but it is in the form of molecules consisting of three oxygen atoms.
• Water (H2O) is a compound because it is made up of hydrogen and oxygen atoms bonded together in a fixed ratio.
• Air is a homogeneous mixture because it is a mix of various gases like nitrogen, oxygen, carbon dioxide, and others that are uniformly distributed.