The empirical and the molecular formula of a compound are ont always the same. Explain.

The molecular formula of cryolite is

What do you mean by empirical formula and molecular formula of a compound? Under what conditions, the molecular formula of a compound becomes identical with its empirical formula?

Molecular mass and formula mass are not always synonymous-explain.

Combustion of 1 volume of a compound (contains of C, H and N) in air produces 3 volumes of CO_(2) and 4.5 volumes water vapour and 0.5 volume of N_(2) . Calculate the molecular formula of the compound. [all volumes are measured at same temperature and pressure].

Elements X,Y and Z have 4,5 and 7 valence electrons respectively, (i) Write the molecular formula of the compounds formed by these elements individually with hydrogen (ii) which of these compounds will have the highest dipole moment ?

The order and molecularity of an elementary reaction are the same - explain.

Percentage composition of a salt is K=8.23%, Al=5.70%, SO_(4)=40.51% and H_(2)O=45.5% . What is the empirical formula of the compound? The molecular mass of the compound is 948. what is its molecular formula?

The commonest disaccharide has the molecular formula?

The percentage of carbon and hydrogen in an organic compound are 92.5 and 7.5. Determine the'molecular formula of the compound if its vapour density is 39.