Question

A hydrated salt is a solid that includes water molecules within its crystal structure. A student heated a 9.10-gram sample of a hydrated salt to
a constant mass of 5.41 grams. What percent by mass of water did the salt contain?
(1) 3.69% (3) 40.5%
(2) 16.8% (4) 59.5%

Answer 1

Subtract 5.41 from 9.10. The salt contained 3.69 grams of water. 3.69g of water/9.10g hydrated salt*100= 40.5%, (3).

Answer 2

Answer: 40.5%

Explanation:Please see attachment for explanation