Question

how many oxide ions are there in 4 moles of al2o3

Answer 1

Answer:

12 × Avogadro's No. is the number of oxide ions in al2o3

Answer 2

12Na

Explanation:

• We have the compound aluminium oxide. We are supposed to find the number of oxide ions present in 4 moles of it.

• We see that each molecule of aluminium oxide we have two ions of aluminium +3 state and 3 ions of oxygen -2 state.

• Oxide represents oxygen in its -2 state .So in each molecule we have three oxide ions.

• We are supposed to calculate the number of oxide ions in 4 moles of the compound.

• So we will have a total of 12 ions in each molecule.

So the total number of oxide ions would be 12Na where Na is the avagadro. number.