a) \(n_{CuSO_4}=\dfrac{9,03\times10^{23}}{6\times10^{23}}=1,505\left(mol\right)\)
\(\Rightarrow m_{CuSO_4}=1,505\times160=240,8\left(g\right)\)
b) \(n_{N_2}=\dfrac{6,02\times10^{23}}{6\times10^{23}}=\dfrac{301}{300}\left(mol\right)\)
\(\Rightarrow m_{N_2}=\dfrac{301}{300}\times28=28,093\left(g\right)\)