6x10^23 that is 6 with 23 0's after it.
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atoms in 12 g of c-12
The unit is "per mole", or mol^-1.
Avogadro's number represents the number of units of a substance in one mole of the substance. These units may be electrons, atoms, ions, or molecules, depending on the substance.
A mole of any substance has the Avogadro's number of such units. As an example, a mole of hydrogen atoms is equivalent to 6.022 x 1023 atoms.
23/100 23 is a prime number, therefore can only be displayed like this