Question

Avogadro's number is the number of molecules present in (a) 1 g of molecule (b) 1 atom of molecule (c) 1 mole (d) 1 litre of molecule

• A. 1 g of molecule
• B. 1 atom of molecule
• C. 1 mole
• D. 1 litre of molecule

Answer 1

The correct option is C

1 mole

The correct option is C.

Explanations of the correct option:

1. Avagadro's number defines the number of particles present in one mole of any substance as a fixed value $6.022\times {10}^{23}$.
2. This numeric value is called Avogadro’s number.
3. The number of units present in one mole of any substance is called Avogadro’s number or Avogadro’s constant.
4. The units may be electrons, ions, atoms, or molecules, depending on the character of the reaction and the nature of the substance.

Final answer: Avogadro's number is the number of molecules present in 1 mole.