Please please answer

Dear student ,
KMnO₄ =  K  + Mn  +  4xO =  39 + 55 + 4 x 16  =  158 gm / mol
CuSO₄  =  63.5  + 32 + 4 x 16  =  159.5 gm /mol
Please ask next question in another thread 
Regards