Calculate the molecular weight of Al2(SO4)3.14.3H2O

In summary, the question asks for the molecular weight of Al2(SO4)3.14.3H2O. The attempt at a solution involves considering the average number of water molecules per molecule, which can be either 14 or 15. This means there are 28.6 H atoms and 14.3 O atoms in one molecule. The final calculation should include 2 Al atoms, 3 S atoms, 28.6 H atoms, and 40.6 O atoms.
  • #1
dss975599
31
1

Homework Statement



Calculate the molecular weight of Al2(SO4)3.14.3H2O

Homework Equations

The Attempt at a Solution



May i know how to do this ? Does it mean 14*3 = 42(H20) , where there re 84H , 42O atoms ?
 
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  • #2
dss975599 said:

Homework Statement



Calculate the molecular weight of Al2(SO4)3.14.3H2O

Homework Equations

The Attempt at a Solution



May i know how to do this ? Does it mean 14*3 = 42(H20) , where there re 84H , 42O atoms ?
In one molecule there will be always integral number of water molecules, may be either 14 or 15. but 14.3 may be the molecules per molecule on the average. So while calculating you can take care of this.
 
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  • #3
Let'sthink said:
In one molecule there will be always integral number of water molecules, may be either 14 or 15. but 14.3 may be the molecules per molecule on the average. So while calculating you can take care of this.
Does it means there are 14.3 (H20 ) atoms ?
Which means 28.6 H atoms and 14.3 O atoms ?
 
  • #4
dss975599 said:
Does it means there are 14.3 (H20 ) atoms ?
Which means 28.6 H atoms and 14.3 O atoms ?
yes.
 
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  • #5
Let'sthink said:
yes.
Does it mean there are
2Al
3S
14.3H
4(3) + 14.3(2) = 40.6 O atoms ??
 
  • #6
dss975599 said:
Does it mean there are
2Al
3S
14.3H
4(3) + 14.3(2) = 40.6 O atoms ??
There is some mistake in calculating O and H atome.
 
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  • #7
dss975599 said:
Which means 28.6 H atoms and 14.3 O atoms ?
That was correct. modify your latest thinking to be in tune with this.
 
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FAQ: Calculate the molecular weight of Al2(SO4)3.14.3H2O

What is the formula for calculating molecular weight?

The formula for calculating molecular weight is:

(number of atoms of element 1 x atomic weight of element 1) + (number of atoms of element 2 x atomic weight of element 2) + ...

For example, the molecular weight of water (H2O) would be calculated as: (2 x 1.008) + (1 x 15.999) = 18.015 g/mol

How do I determine the number of atoms of each element in a chemical formula?

To determine the number of atoms of each element in a chemical formula, you need to look at the subscript numbers following each element. These numbers indicate the number of atoms of that element present in one molecule of the compound.

In the case of Al2(SO4)3.14.3H2O, there are 2 atoms of aluminum (Al), 3 atoms of sulfur (S), 12 atoms of oxygen (O), and 6 atoms of hydrogen (H) in one molecule.

What is the atomic weight of each element in Al2(SO4)3.14.3H2O?

The atomic weight of an element is the average mass of one atom of that element. The atomic weights can be found on the periodic table. For Al2(SO4)3.14.3H2O, the atomic weight of aluminum is 26.98 g/mol, sulfur is 32.06 g/mol, oxygen is 16.00 g/mol, and hydrogen is 1.008 g/mol.

What is the molecular weight of Al2(SO4)3.14.3H2O?

To calculate the molecular weight of Al2(SO4)3.14.3H2O, we first need to determine the total number of atoms present in one molecule. As mentioned earlier, there are 2 atoms of aluminum, 3 atoms of sulfur, 12 atoms of oxygen, and 6 atoms of hydrogen. Plugging these numbers into the formula for calculating molecular weight, we get: (2 x 26.98) + (3 x 32.06) + (12 x 16.00) + (6 x 1.008) = 342.19 g/mol

Why is the molecular weight of Al2(SO4)3.14.3H2O given in grams per mole (g/mol)?

Molecular weight is given in grams per mole because it represents the mass of one mole of a substance, which is equal to the Avogadro constant (6.022 x 10^23) of molecules. This unit allows scientists to easily compare the masses of different substances and perform calculations in chemistry.

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