Define empirical formula.

A hydrocarbon contains 7.7 % hydrogen. calculate the empirical formula.

Define chemical formula ?

On analysis a substance was found to contain C = 54.54% H = 9.09% O = 36.36% . calculate the empirical formula.

A substance on analysis gave the following percentage composition Na = 43.4% C = 11.3% O = 45.3% Calculate the empirical formula.

An inorganic substance on analysis gave the following results Na = 29.1% S = 40.5% and O = 30.4% . Calculate its empirical formula.

A compound with empirical formula AB2 has the vapour density three times its empirical formula weight. Find the molecular formula.

Give the empirical formula of N2H4

Give the empirical formula of C2H4

Give the empirical formula of C4H8

Give empirical formula of C6H12