The mass fraction of alumina (Al2O3) in a bauxite is 88%.

Therefore,10t metal aluminum shall be prepared,2Al2O3==energized==4Al+3O2↑
Therefore, to produce 10t metal aluminum, the mass of Al2O3 required is 204*10/(4*27)=18.9t
Therefore, theoretically, the ore mass is 18.9/88%=21.5t.

Use a reagent to identify phenol,1-hexene, potassium iodide solution and benzene. A,HCL B,FECL3 solution C, bromine water D, carbon tetrachloride Phenol,1-hexene, potassium iodide solution potassium iodide solution and benzene. A,HCL B,FECL3 solution C, bromine water D, carbon tetrachloride

C bromine water
Reaction with phenol to precipitate
Fading with 1-hexene addition bromine water
Reaction with potassium iodide to form purple iodine precipitate
Extraction with benzene, colorless on top, orange on bottom

RELATED INFORMATIONS

1. What is produced by mixing a sodium bisulfate solution with a sodium bicarbonate solution? What is the ion equation?
2. Steps for verifying SO42-: add BaCl2 and then add HCl.
3. The main components of limestone are known as calcium carbonate, which can be decomposed into calcium oxide and carbon dioxide by heating at high temperature. Please write the correct chemical equation ___________. If the content of calcium carbonate is 80% in the existing 125g limestone, how many grams of pure calcium carbonate can be calculated in 125g limestone? _________ If the calcium carbonate of this limestone is fully heated and completely decomposed, how many grams of carbon dioxide can be generated? If the density of carbon dioxide is 2 g/L, what is the volume of carbon dioxide produced?
4. Is the melting point of the alloy higher or lower than the composition
5. The ion reaction equation in which carbon dioxide is introduced into clear lime water to produce white precipitate and then dissolve
6. What's the method for making oxygen in the laboratory? Ladies and gentlemen, poor little brother.
7. IONIC EQUATION OF DROP IN MINOR AND EXCESS Ca (oH)2 SOLUTION IN NaHCO3 If so, explain whether the replacement reaction occurs or not
8. Reaction Equation of Ca (OH)2 and NaHCO3 The reaction of excess Ca (OH)2 with NaHCO3, the reaction of excess Ca (OH)2 with NaHCO3, and the exact complete reaction Is there any other topic like this that can be taken as an example?
9. Chemical Equation for Reaction of NAHCO3 Solution with Excess CA (OH)2 Solution
10. The reaction equation of Ca (OH)2 with a small amount of NaHCO 3 and an excessive amount of NaHCO 3 obtained.
11. Fecl3 fecl2 conversion Fecl3→ fecl2 Fecl2→ fecl3 What reagent is added to each reaction? Fecl3 fecl2 conversion Fecl3→ fecl2 Fecl2→ fecl3 What reagents are added to each reaction?
12. When a certain amount of iron powder is added to the mixed solution of Cu (NO3)2, AgNO3 and Zn (no3)2 and bubbles are generated, the filtered solids must contain? The filtrate must contain? (Fill in chemical formula)
13. In the mixed solution of AgNO3, Cu (NO3)2 and Zn (NO3)2, add a certain amount of iron powder, filter after full reaction, add dilute hydrochloric acid in the filter residue, and gas will be produced. The following conclusions are correct:() A. There must be Fe (NO3)3 in the filtrate B. The filter residue contains only Ag and Cu, and there must be no Zn. C. There must be Ag, Cu and Fe in the filter residue, and there must be no Zn. D. There must be Ag, Cu, Fe and Zn in the filter residue
14. Ion Reaction Equation of NaOH (Less)+Ca (HCO3)2(More)
15. Ion Reaction Equation for Ca (HCO3)2(Less)+ NaOH and Ion Equation for Ca (HCO3)2(More)
16. How to write the chemical equation of Ca (HCO3)2 solution by adding excess NaOH solution to fully react? How to write the chemical equation of Ca (HCO3)2 solution by adding excess NaOH solution to it?
17. What happens when Ca (HCO3)+ NaOH (sufficient) is reacted
18. ON THE CHEMICAL EQUATION OF REACTION OF Ca (HCO 3)2 WITH EXCESS NaOH NaHCO3 reacts with excess Ca (OH)2 to form NaOH Then Ca (HCO3)2 reacts with excess NaOH, and the OH radical is also excessive. Why is there no Ca (OH)2? ON THE CHEMICAL EQUATION OF REACTION OF Ca (HCO3)2 WITH EXCESS NaOH NaHCO3 reacts with excess Ca (OH)2 to form NaOH Then Ca (HCO3)2 reacts with excess NaOH, and the OH radical is also excessive. Why is there no Ca (OH)2?
19. NaHCO3(small amount)+ Ca (OH)2 and NaHCO3(excess)+ Ca (OH)2
20. How to distinguish NaOH from Ca [OH ]2