Answer to Question #133774 in General Chemistry for van sung

Question

you now have the mass of chlorine that combine with 1.00g of Fe for each of the two different compounds. Do the ratio of 1:2 support or obey the law of multiple proportions.

Answer 1

$$n(Fe) = m(Fe)/A_r(Fe) = 1.00g/55.845g/mol=0.018mol$$

$$n(Cl) = 2n(Fe) = 2*0.018 mol = 0.036mol$$