akshar

the density of 3 molar solution of sodium chloride is 1.25gm/ml.calculate the molality of the solution

an organic compound contains 49.3 percent carbon,6.84percent hydrogen and its vapour density is 73.molecular formula of compound

1) the weight of water in 1litre of 2M nacl solution of density 1.117g/ml. 2)there are two common oxides of sulphur one of which contains 50percent oxygen by weight the other almost 60 percent.the weight of sulphur which combine with 1g o2 are in ratio

sin(alpha-bita)=1/2 and cos(alpha+bita)=1/2, where alpha and bita are positive acute angles then what is the value of alpha and bita