Answer:
The correct answer is calcium sulfate (CaSO4)
Explanation:
Hello!
Let's solve this!
Let's look at each of the options separately:
CaSO4: it is a solid salt at room temperature, when water is added it is transformed into plaster. It is solid with water
CuCl2: not solid with water
Na2S: it is not solid with water
Sr (NO3) 2: it is not solid with water
We conclude that the correct answer is calcium sulfate (CaSO4)
