Name each compound and calculate its formula mass.
Here, we are going to write the name and calculate the formula mass.
Formula mass is the average mass of the molecule of a compound.
Formula mass of a molecule can be calculated by using the following formula.
Formula mass = (no of atoms of the element ) x (atomic mass of 1st element) + (no of atoms of the element ) x (atomic mass of 2nd element) +...
The chemical name of the compound is Aluminium sulfate.
= 2 x(atomic mass of Al)+ 3 x(atomic mass of S )+12 (atomic mass of O)
= 1 x 26.98 amu +3 x 32.065 amu + 12 x 16.00 amu
=53.96 amu + 96.195 amu + 192 amu
= 342.155 amu
The formula mass of Al2(SO4)3 is 342.15 amu.
The chemical name of the compound is Diphosphorus Trioxide.
= 2 x(atomic mass of P)+ 3 x(atomic mass of O )
= 2 x 30.97 amu +3 x 16.00 amu