Cn some1 plz help me in this problem?

Question

Calculate the molar solubility of copper(II) sulfide in each of the following.0.21M K2S.

i m getting wrong ans like 3.02*10^-36M

cn some1 plz help me

Answer 1

CuS -->  Cu+2  & S-

K = 6 e-37 = [Cu+2] [S-2]

6 e-37 = [Cu+2] [0.21]

your answer: 2.9e-36

we likely differ, only because books differ on what they believe the K to be

I would use your K, & go with your answer to 2 sig figs