Is the value of a mole 6.022*10^23 or 6.023*10^23?

Question

I've come across both these values in different books but I'm not sure which is correct.

Answer 1

The reported value is 6.02214076×10²³ / mole

If you want to round it to 4 significant figures, the value would then be 6.022x10²³ / mole.