Calculate the Formula unit mass of CaCl2.
110u
112u
100u
111u
Formula unit mass is the sum of the atomic masses of all the atoms in the formula unit of a compound.
So, Formula unit mass of CaCl2 = Atomic mass of Ca + 2 x Atomic mass of Cl
40 + 2(35.5) =111 u.
The molecular mass of CaCl2 is :