Question

quiz
question 1 of 10
which two types of matter are pure substances?
choose one option
a homogenous mixtures and elements
b solutions and compounds
c elements and compounds
d mixtures and elements

Explanation:

• A pure substance has a constant composition.
• Elements (e.g., \(O_2\)) and compounds (e.g., \(H_2O\)) have definite compositions.
• Homogeneous mixtures (e.g., salt - water solution) and heterogeneous mixtures do not have a fixed composition throughout. Solutions are a type of homogeneous mixture.

Answer:

C. elements and compounds