Question

What is the percentage by mass of sulphur in Al2(SO4)3[A12SO4 =
342g/mol, S = 32]​

Answer 1

Answer: The percentage by mass of sulphur in
`Al_2(SO_4)_3` is 9.36%

Step-by-step explanation:

Mass percent of an element is the ratio of mass of that element by the total mass expressed in terms of percentage.

`{\text {Mass percentage}}=\frac{\text {mass of sulphur}}{\text {Total mass}}* 100\%`

Given: mass of sulphur = 32 g/mol

mass of
`Al_2(SO_4)_3` = 342 g/mol

Putting in the values we get:

`{\text {Mass percentage}}=(32g/mol)/(342g/mol)* 100\%=9.36\%`

The percentage by mass of sulphur in
`Al_2(SO_4)_3` is 9.36%