Four samples of a compound containing only iron and chlorein were prepared in different ways. A chemist analysed the samples and measured the mass of the 2 elements in each. the results are:
Mass of iron (g) Mass of chlorine (g)
5.59 10.64
1.68 3.20
1.40 2.67
1.96 3.73
Use any pair of results to calculate the formula of the compund
Really stuck on this question. I know I will have to use the atomic mass or moles or something, but i have no idea where to start.