what is the percentage of water in

Question

Ba(OH)2 x 8H2O?

Answer 1

You have 20 lbs fruit with 10 lbs being oranges and the others apples. What is the percent oranges.
%oranges = (weight oranges/total weight)*100 = (10/20)*100 = 50%.
Percent works the same way in chemistry.
%H2O = (mass H2O/mass sample)*100 =
(8*molar mass H2O/molar mass Ba(OH)2.8H2O)*100 = ??
Note: The molar mass Ba(OH)2.8H2O is molar mass Ba(OH)2 _plus molar mass 8H2O and not times 8H2O.

Answer 2

45.69%