Answer
There are $ 1.3 \times 10^{27}$ atoms of Cu
Work Step by Step
Number of mole = $\frac{mass}{molar mass} = \frac{133 \times 10^{3}}{63.5} = 2094.45$ moles
1 mole = $6.022 \times 10^{23}$ atoms
number of atoms = (number of moles) $\times (6.022 \times 10^{23})$ = $(2094.45) \times (6.022 \times 10^{23})$
= $ 1.3 \times 10^{27}$ atoms
Therefore there are $ 1.3 \times 10^{27}$ atoms of Cu
