In a reaction, 3.78g of iron metal is reacted completely with excess sulfur to produce only one product, a compound that weighs 5.95g. What is the empirical formula of this compound

The empirical formula is

Explanation:

Mass of Fe = 3.78 g

Mass of S = (5.95-3.78) g = 2.17 g

Step 1 : convert given masses into moles.

Moles of Fe =

Moles of S =

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For Fe =

For S =

The ratio of Fe : S= 1: 1

Hence the empirical formula is

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error