Question

What is the percentage of water in hydrated calcium chloride​

Answer 1

Answer: 24.5%

Explanation: Molar mass of CaCl2 * 2 H2O = 40.078 + ( 2 x 35.453) + ( 2 x 18.02)=147.024 g/mol

% H2O = 2 x 18.02 x 100/ 147.024 =24.5

Answer 2

24.5%

Step-by-step explanation:

You just add up the atomic masses.

Ca - 40.078

Cl2 - 35.4527 x 2 = 70.9054

------ 110.9834

H4 - 1.00794 x 4 = 4.03176

O2 - 31.9998

------ 36.03056

TOTAL - 147.01396

So the water is 36.03056/147.01396 = .245082576 but that is only accurate to three decimals (because the mass of Ca was only given to three decimals) so we write .245 and that is 24.5%

This is not my answer but I found it on Yahoo answers and it was answered by Anonymous.