Question

Which of these describes a Mole in Chemistry?

Answer 1

Answer: D. All of the above describe a mole

Explanation:

Mole is the unit for amount of substance. It is used for describing large number of particles.

According to avogadro's law, 1 mole of every substance weighs equal to molecular mass and contains avogadro's number $6.023\times 10^{23}$ of particles.

For example: 1 mole of Na atom will weigh 23 grams and contains $6.023\times 10^{23}$ atoms.

Thus all the above describes a mole.