Recruitment of Chinalco Guangxi Branch

(1) The mass ratio of aluminum to oxygen in alumina is (2× 27): (16× 3) = 9: 8;

(2) The mass of bauxite containing 380% Al2O3 is X ..

2Al2O3？ Turn it on? . ? 4Al+3O2↑。

204 108

80%×x 1080 ton

20480%×x= 108 1080t

X = 2550t tons

So the answer is: (1) 9: 8; (2) It needs 2550 tons of bauxite with alumina content of 380%.