Question

Smallest whole no.ratio must N and O atoms combine to make dinitrogen to tetroxide N2O4? What is the mole ratio of the elements in this compound

Answer 1

So you would need to multiply to get the .4 to the nearest whole number. Usually a problem will give a molar mass for the molecular formula and the empirical formula will have to be multiplied by a whole number to be equal to the molecular formula.