Question

You dissolve 25 g of CaSO4 in water and dilute to 1500 mL. What is the molarity of this solution?

Answer 1

moles CaSO4 = grams/molar mass = ?
Then M = moles CaSO4/1.5 L = ?

Answer 2

25g / 136.4 = 0.087
0.087/ 1.5L
= 0.085?

Answer 3

I have no idea what you're doing wrong but the first division is not correct and neither is the second one. If you're doing this with a calculator are you using the calculator correctly? It might be a good idea to divide something you know the answer; i.e.,
10/5 = 2.0
125/13 = 9.615
100/25 = 4.0

Answer 4

yeah it was my calculator, i figured it out though. however, when you respond to questions you could be a little nicer. thanks for the help :)