To determine the number of atoms in a box of salt, we have to multiply the number of atoms contained in a grain of salt by the number of grains contained in a box of salt.
We are given that there are
[tex]1.2\times10^{18}[/tex]atoms in a grain of salt, and that there are
[tex]5\times10^6\text{ }[/tex]grains of salt in a box of salt, therefore, in total there are:
[tex]1.2\times10^{18}*5\times10^6[/tex]atoms in the box.
Simplifying the above result, we get:
[tex]6\times10^{24}.[/tex]Answer:
[tex]6\times10^{24}.[/tex]