if 11.80 g of iron reacts with 5.06 g of oxygen . Determine the empirical formula of the resulting oxide ?

Answer 1

figure the moles of each element.

divide both moles by the lower of the two.

The result, is the ratio of the elements. Convert that ratio to small whole numbers. For instance:

X 1.5 Y 1 X3Y2
X 7 Y 5.1 X7Y5
X1 Y 1.333 X3Y4