\(a,m_{Fe}=0,4.56=22,4(g)\\ b,m_{Al_2O_3}=0,025.102=2,55(g)\\ c,m_{SO_3}=\dfrac{80.4,958}{24,79}=16(g)\\ d,m_{N_2}=\dfrac{28.7,437}{24,79}=8,4(g)\\ e,m_{Ag}=\dfrac{108.9.10^{-22}}{6.10^{-23}}=1620(g)\\ f,m_{N_2}=\dfrac{28.1,2.10^{-23}}{6.10^{-23}}=5,6(g)\)