## Chemistry: Principles and Practice (3rd Edition)

A mole is the exact number of carbon atoms present in 12 grams of the isotope carbon-12. This number is equal to 6.022 x 10$^{23}$ atoms.
A mole is the exact number of carbon atoms present in 12 grams of the isotope carbon-12. This number is equal to 6.022 x 10$^{23}$ atoms.