Answer:
52.12%
Step-by-step explanation:
First you need to find the mass of the total molecule. The mass of one atom of Fe is 55.847. The mass of one atom of Cl is 35.453. The mass of O is 16.00, and the mass of H is 1.00. The mass of the whole atom is calculated as follows:
55.847 + 3(35.453) + 6(16.00)+ 12(1.00) = 270.206.
Next calculate the mass of water in the molecule:
(2)1.00 + 16.00 = 18.00(6 molecules) = 108
Finally, divide the mass of water by the mass of the whole molecule and multiply by 100 to get it as a percent:
108/207.206 = 0.52122 x 100 = 52.12%