Question

How many moles of al2(so4)3 contain 0.25 mole of oxugen atoms?

Answer 1

Answer:

1mole of al2(so4)3 contains 12 mole oxyzen atom.

then 1 mole of oxygen atom is in 1/12mole of aluminium solphate.

then 0.25 mole of oxygen atom is in 0.25/12 mole of aluminum solphate.

Answer 2

Answer

0.02 moles

Explanation:

in al2(so4)3

12 mole o2 = 1 mole salt

then

0.25 mole o2 = (0.25/12)

                       =0.02 ans.

it's very easy..