Question

Which of the following is not equal to 1 mole of substance?

none of above

6.02 × 1023 hydrogen molecules, H2

22.4 L of H2 gas at STP

one mole atom of carbon

6.02 × 1023 sodium molecules, Na

6.02 × 1023 gold atoms, Au

Answer 1

Answer : The one mole atom of carbon is not equal to 1 mole of substance.

Explanation :

As we know that,

`6.02* 10^(23)` number of hydrogen molecules present in 1 mole of substance.

and,

At STP, 22.4 L volume of hydrogen gas present in 1 mole of substance

and,

`6.02* 10^(23)` number of sodium molecules present in 1 mole of substance.

and,

`6.02* 10^(23)` number of gold molecules present in 1 mole of substance.

All these options are equal to the 1 mole of substance.

While the option, one mole atom of carbon is not equal to the 1 mole of substance because 1 mole of atom of carbon is equal to 12 grams.

Hence, the one mole atom of carbon is not equal to 1 mole of substance.