A Which elements does a hydrocarbon contain? b Calculate the empirical formulae of A and B.
c Calculate the molecular formulae of A and B.​

a. A hydrocarbon is any of a class of organic chemicals made up of only the elements carbon (C) and hydrogen (H). The carbon atoms join together to form the framework of the compound, and the hydrogen atoms attach to them in many different configurations.

its first and third is your answer i did the qustion the fourth isnt right

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.