8.0575*10^-12kg of glaubers salt are dissolved in water to obtain 1dm^3 of a solution of density 1077.2kg/m^3. calculate the molarity, molality and mole fraction of Na2SO4 in the solution. plz.............its urgent!

I am giving you the links which not only contain solution of this problem but also many other problems so hope these will be much useful to you

http://books.google.co.in/books?id=1DFL3O0iHCQC&pg=PA372&lpg=PA372&dq=glauber%27s+salt+are+dissolved+in+water+to+obtain+1+dm^3+of+a+solution+of+density&source=bl&ots=QFwg96l7L1&sig=BsbX1yzPFNBV1Mke5wp3Jn4s-Aw&hl=en&ei=UpswTqDrEqmImQXm4Yy1CQ&sa=X&oi=book_result&ct=result&resnum=10&ved=0CFcQ6AEwCQ#v=onepage&q&f=false

http://books.google.co.in/books?id=wNYMUeCcaSEC&pg=SA1-PA51&lpg=SA1-PA51&dq=glauber%27s+salt+are+dissolved+in+water+to+obtain+1+dm^3+of+a+solution+of+density&source=bl&ots=TsLEqkhGh1&sig=R3n8G4EjhlAK5lbqmy5cSUtnzwU&hl=en&ei=UpswTqDrEqmImQXm4Yy1CQ&sa=X&oi=book_result&ct=result&resnum=6&ved=0CEIQ6AEwBQ#v=onepage&q=glauber%27s%20salt%20are%20dissolved%20in%20water%20to%20obtain%201%20dm^3%20of%20a%20solution%20of%20density&f=false

http://books.google.co.in/books?id=j1QYRhq7mOQC&pg=SA1-PA29&lpg=SA1-PA29&dq=glauber%27s+salt+are+dissolved+in+water+to+obtain+1+dm^3+of+a+solution+of+density&source=bl&ots=LtzBFjzIr-&sig=sMbkhBNtNkmmJ-v_J2GGuD5UMVI&hl=en&ei=UpswTqDrEqmImQXm4Yy1CQ&sa=X&oi=book_result&ct=result&resnum=7&ved=0CEUQ6AEwBg#v=onepage&q&f=false