Iron Can Form Two Sulfides: FeS and Fe₂S₃

Multiple Choice

Iron can form two sulfides: FeS and Fe₂S₃. Use Dalton's law of multiple proportions to predict the ratio of the two masses of sulfur that combine with 100 g of iron in each case to form these compounds.

A) 1:1
B) 1:3
C) 1:2
D) 2:3
E) 3:4