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

Explanation :

As we know that,

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,

number of sodium molecules present in 1 mole of substance.

and,

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.

i'm wiling to try and you : )