\(n_{Al}=\dfrac{1,5.10^6}{27}=\dfrac{1}{18}.10^6\left(mol\right)\)
\(4Al+3O_2\rightarrow2Al_2O_3\)
\(\rightarrow n_{Al_2O_3}=\dfrac{1}{36}.10^6\left(mol\right)\) < lý thuyết >
\(\rightarrow n_{Al_2O_3}=\dfrac{1}{36}.10^6:60\%=\dfrac{5}{108}.10^6\left(mol\right)\)
\(\rightarrow m_{boxit}=\dfrac{5}{108}.10^6:85\%=\dfrac{25}{459}.10^6\left(g\right)\)\(\approx54466\) (tấn)
PTHH: \(4Al+3O_2\underrightarrow{t^o}2Al_2O_3\)
Ta có: \(n_{Al}=\dfrac{1500}{27}=\dfrac{500}{9}\left(kmol\right)\) \(\Rightarrow n_{Al_2O_3}=\dfrac{250}{9}\left(kmol\right)\)
\(\Rightarrow n_{Al_2O_3\left(lýthuyết\right)}=\dfrac{\dfrac{250}{9}}{60\%}=\dfrac{1250}{27}\left(kmol\right)\) \(\Rightarrow m_{Al_2O_3\left(lýthuyết\right)}=\dfrac{1250}{27}\cdot102=\dfrac{42500}{9}\left(kg\right)\)
\(\Rightarrow m_{quặng}=\dfrac{\dfrac{42500}{9}}{85\%}=\dfrac{50000}{9}\left(kg\right)\approx5,56\left(tấn\right)\)
