\(M_{Al}=27đvC=27.1,66.10^{-24}=4,482.10^{-23}(g)\)
\(M_{Na}=23đvC=23.1,66.10^{-24}=3,818.10^{-23}(g)\)
\(M_{Ba}=137đvC=137.1,66.10^{-24}=2,2742.10^{-22}(g)\)
\(M_{Fe}=56đvC=56.1,66.10^{-24}=9,296.10^{-23}(g)\)
\(M_{Cu}=64đvC=64.1,66.10^{-24}=1,0624.10^{-22}(g)\)