In chemistry, 6.022× 1023 is an important number called the avogadro constant (or avogadro\'s number). it expresses the number of atoms or molecules in a mole. notice that it is a really, really big number, as indicated by scientific notation with a large positive exponent. enter 6.022× 1023 into the calculator shown here. then, by trial and error, find the largest number that can be added to 6.022× 1023 without changing its displayed value (as shown on the screen).