please help me and please make sure the answer has a unit symbol and 2 significant digits

A chemistry student is given 1.00 L of a dear aqueous solution at 15. C. He is told an unknown amount of a certain compound X is dissolved in the solution The student allows the solution to cool to 15. C. The solution remains clear. He then evaporates all of the water under vacuum. A precipitate remains. The student washes, dries and weighs the precipitate. It weighs 0.049 kg. Oves -- using only the information above, can you te the way of Xin water at 15 no . If you and yes, calculati Be sure your answer has a unit symbol and 2 significant digits 0 x X 5