Question

The definition for pure substances is that they consist of only one type of atoms or molecules then why is it that water even though it has two elements, i.e. , hydrogen and oxygen is called a pure substance

Answer 1

A pure substance is a sample of matter with both definite and constant composition with distinct chemical properties.

Examples of pure substances include elements and compounds. Alloys and other solutions may also be considered pure.

• water
• diamond
• gold
• table salt (sodium chloride)
• ethanol
• brass
• bronze
• saline solution