What is relative density ? Also write its formula (how to calculate it.).
The relative density of a substance is the ratio of its density to that of water .
Relative density = Density of a substance / Density of water
Empirical formula of a compound is CH2O. If its empirical formula mass is equal to its vapour density. Calculate the molecular formula of the compound.
(a) Calculate the empirical formula of the compound having 37.6% sodium, 23.1% silicon and 39.3% oxygen (O = 16; Na = 23; Si = 28). (b) The empirical formula of a compound is C2H5. It has a vapour density of 29. Determine the relative molecular mass of the compound and hence its molecular formula.