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Iron (III) Chloride has the chemical formula, FeCl3.

What is the percentage composition of Fe by mass?

What is the percentage composition of Cl by mass?

2007-05-10 15:11:41 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry

2 answers

Molar mass FeCl3 =166.2 g/mol

atomic mass Fe = 55.847 g / mol

55.847 : 166.2 = x : 100

x = 34.4 % percentage of Fe

100 - 34.4 = 65.6 % percentage of Cl

2007-05-10 17:17:26 · answer #1 · answered by Anonymous · 0⤊ 0⤋

This is straightforward.

Total up the mass (use Periocid Table) of Fe and 3 chlorines.

Now just take the %ratio of Fe over the total and the same for the chlorine

2007-05-10 15:15:07 · answer #2 · answered by reb1240 7 · 0⤊ 0⤋