posted by Amir .
Hydrocarbons A and B both contain 85.7 % carbon. Their molar masses are 42 and 84 respectively.
a) Which elements does a hydrocarbon contain?
b) Calculate the empirical formula of A and of B.
c) Calculate the molecular formula of A and B.
I solved a) and b)
the solutions are
a) Hydrogen and Carbon
b) the simplest ratio is 2:1 so empiral formula is CH2