9.49 x 10^21 atoms of Cu is equivalent to 1.58 x 10^-2 moles of Cu.
To convert the number of atoms of copper (Cu) to moles, we need to use Avogadro's number. Avogadro's number is defined as the number of atoms, ions, or molecules in one mole of a substance. It is equal to 6.022 x 10^23.
The number of moles of Cu can be calculated as follows:
9.49 x 10^21 atoms / (6.022 x 10^23 atoms/mol) = 9.49 x 10^21 / 6.022 x 10^23 mol = 1.58 x 10^-2 mol