$8.0575\times 10^{-2}kg$ of Glauber's salt is dissolved in water.Obtain $1clm^3$ of a solution of density $1077.2kgm^{-3}$.Calculate the molarity and the mole fraction of $Na_2SO_4$ in solution .

Question

$(a)\;0.2502m,0.24m,4.3\times 10^{-3}\\(b)\;0.3m,0.1m,2\times 10^{-2}\\(c)\;.15m,0.3m,1.3\times 10^{-3}\\(d)\;.3m,0.156m,1.3\times 10^{-2}$