A. is the correct answer.
Answer:
the basic unit of a chemical element.
Explanation:
Heart arteries lungs capillaries veins heart
You would use this number, 6.02×1023 (Avogadro's number) to convert from particles, atoms, or molecules to moles. Whenever you go to the mole, divide by Avogadro's number. When you go to the unit from moles, multiply by Avogadro's number.
