Question

what is defined as the no.of carbon atoms in 1 mole or in exactly 12g of the carbon 12 isotope​

Answer 1

Answer:

Explanation:

The MOLE (mol) is a unit of measurement that is the amount of a pure substance containing the same number of chemical units (atoms, molecules etc.) as there are atoms in exactly 12 grams of carbon-12 (i.e., 6.022 X 1023).

So the mole is the title used for the amount 6.022 x 1023 much the same way the word "dozen" is used for the amount 12.

So if you had a mole of donuts you would have 6.022 x 1023 donuts and a serious stomach ache.

We use the mole (mol) to represent the amount of substances in chemistry because the numbers of atoms and molecules in each substance is so large. The value given 6.022 x 1023 is called Avagadro's number for the scientist that found the number of atoms in 12 grams of carbon 12. Why use 12 grams? This is the theoretical atomic mass of the Carbon-12 isotope (6 protons and 6 neutrons). This means that the atomic mass or atomic weight (12 grams) of carbon is equal to exactly 1 mole of carbon.