Question

18. Regarding the formula Al2O3 which of the following is accurate?

A. The subscript 2 indicates that two atoms of aluminum are present in the substance.
B. The subscript 2 indicates that two atoms of oxygen are present in the substance.
C. The chemical symbol Al indicates that argon is present in the substance.
D. The coefficient 3 indicates that there are a total of three atoms of oxygen present in the substance.

Answer 1

A. The subscript 2 indicates that two atoms of aluminum are present in the substance. (Correct)

B. The subscript 2 indicates that two atoms of oxygen are present in the substance. (Incorrect)

C. The chemical symbol Al indicates that argon is present in the substance. (Incorrect, Al is the symbol for Aluminum)

D. The coefficient 3 indicates that there are a total of three atoms of oxygen present in the substance. (Incorrect, 3 is a subscript here, not a coefficient, and it indicates that there are three atoms of oxygen in each molecule of the compound)

So, the correct answer is A. The subscript 2 indicates that two atoms of aluminum are present in the substance. Furthermore, the subscript 3 next to O indicates that there are three atoms of oxygen in the compound.

Answer 2

Step-by-step explanation:

The subscript 2 denotes that the material contains two aluminum atoms. Silvery-white and light in weight, aluminum is a metal. It is supple and moldable. Cans, foil, culinary kitchenware, window frames, beer kegs, and airplane parts are just a few examples of the many goods that employ aluminum.

Which substances are present in aluminum?

Gibbsite and boehmite, two alpha-hydroxide compounds, are found in bauxite. In the synthesis of aluminum compounds such aluminum disulfide, sodium aluminate, metal fluoride, & aluminum chloride hexahydrate, aluminum trihydroxide is a key ingredient.

How is aluminum produced?

Natural environments do not contain pure aluminum. Beginning with bauxite, which is made up of dehydrated al2o3 (4.0% to 60%) combined with silica + iron oxide, the manufacturing of primary pure metal can begin. For every 4 to 5 tons of bauxite ore, 2 tonnes of aluminium are produced