Question

30 points

What is the molar mass of calcium chloride dihydrate (CaCl2⋅ 2H2O) ?

Be sure to include the mass of all elements in the formula including the elements in water.

64 g/mol

111 g/mol

147 g/mol

258 g/mol

Answer 1

The molecular weight for Calcium Chloride Dihydrate (CaCl2•2H20) is 2H2O.

mass of 64g/mol = 256.52 g/mol
mass of 11g/mol = 26.981538 g/mol
mass of 147g/mol= 146.9149 g/mol
258g/mol = 258.09843 g/mol

Answer 2

`M=147.014 g/mol`

Step-by-step explanation:

The atomic weights of the elements:

Ca=40.078 g/mol

Cl=35.453 g/mol

H=1.008 g/mol

O=15.999 g/mol

The calcium chloride dihydrate:

`M=(40.078+35.453*2+2*2*1.008+2*15.999)g/mol`

`M=147.014 g/mol`