One mole of copper equals 6.02 × 10^23 atoms. The answer is letter C. This follows the
Avogaro’s law wherein 1 mole of a substance is equal to 6.02 x 10^23 atoms,
formula units or molecules. This is applicable to all substances.
High energy hope this helps
Answer:
carbon dioxide and oxygen
A - Sulfur dioxide is an ion because it contains 2 or more elements, and it is a solid