Question

The molecular weight of the compound, Al2(SO4)3.12H2O is?[Al=27;S=32;O=16;H=1]g/mol

Answer 1

Answer:

The molecular weight of Al2(SO4)3.12H2O is 558 amu. (Atomic mass units)

Explanation:

Definition : Molecular weight which can also be referred to as as molecular mass is the mass of one molecule of a given substance(or compound).

Stepwise Approach:

Step1:

In molecular formula of given compound:

Number of atoms of are

Al 2

S 3

O 24

H 24

Step2:

Now to calculate the molecular weight of compound, we will find sum of atomic masses of all the atoms which are present in the given molecule .

Step3

Hence for the respective elements present in the given molecule, we have:

(Number of atoms of the element× Atomic mass of that particular element = Contribution of element in molecular mass of compound)

So we have,

Al : 2×27 = 54 amu

S : 3×32 = 96 amu

O : 24×16 = 384amu

H : 24×1 = 24 amu

Hence, we get the molecular weight of given compound as :

Molecular weight

= sum of atomic masses of all elements of compound

= 54+96+384+24

= 568 amu.