a) \(n_{Cu}=\dfrac{12,8}{64}=0,2\left(mol\right)\)
b) \(n_{CO_2}=\dfrac{66}{44}=1,5\left(mol\right)\)
c) \(n_{Fe_2\left(SO_4\right)_3}=\dfrac{25}{400}=0,0625\left(mol\right)\)
d) \(n_{Fe_2O_3}=\dfrac{8}{160}=0,05\left(mol\right)\)
e) \(n_{NH_3}=\dfrac{1,8.10^{22}}{6.10^{23}}=0,03\left(mol\right)\)
f) \(n_{Cl_2}=\dfrac{20,16}{22,4}=0,9\left(mol\right)\)
Đề bài yêu cầu tính khối lượng hả em?