Molar Mass of Iron(III) chloride
FeCl3 — 162.195 g/mol, worked out element by element.
Molar mass of Iron(III) chloride, FeCl₃
162.195 g/mol
Molecular weight 162.195 · 4 atoms per formula unit
Also known as: fecl3, ferric chloride.
A water-treatment coagulant and a circuit-board etchant.
How 162.195 g/mol is worked out
| Element | Atoms | Atomic mass | Mass | % of total |
|---|---|---|---|---|
| Chlorine | 3 | 35.45 | 106.350 | 65.57% |
| Iron | 1 | 55.845 | 55.845 | 34.43% |
| Total | 4 | 162.195 | 100% |
M = 3 × 35.450 + 1 × 55.845 = 162.195 g/mol
Grams to moles for Iron(III) chloride
| Mass | Moles | Formula units |
|---|---|---|
| 1 g | 0.0062 mol | 3.713 × 10^21 |
| 10 g | 0.0617 mol | 3.713 × 10^22 |
| 25 g | 0.1541 mol | 9.282 × 10^22 |
| 50 g | 0.3083 mol | 1.856 × 10^23 |
| 100 g | 0.6165 mol | 3.713 × 10^23 |
| 250 g | 1.5414 mol | 9.282 × 10^23 |
| 162.195 g | 1 mol | 6.022 × 10^23 |
For any other amount, use the molar mass calculator, or the molarity calculator to make up a solution of a given concentration.
Related compounds
Related Calculators
Frequently Asked Questions
What is the molar mass of Iron(III) chloride?
The molar mass of Iron(III) chloride (FeCl3) is 162.195 g/mol. That is the sum of the standard atomic weights of all 4 atoms in one formula unit: 3 × 35.450 + 1 × 55.845 = 162.195.
What is the molecular weight of Iron(III) chloride?
162.195 — the same number as the molar mass, but as a dimensionless ratio rather than in g/mol. The two terms describe the same arithmetic, so a molecular weight of 162.19 and a molar mass of 162.19 g/mol are the same answer.
How many moles are in 100 g of Iron(III) chloride?
100 ÷ 162.195 = 0.6165 mol. To convert any mass to moles, divide by the molar mass; to go the other way, multiply.
What is the percent composition of Iron(III) chloride?
By mass, Iron(III) chloride is 65.57% chlorine, 34.43% iron. Each element's share is its total mass in the formula divided by 162.195.
How many atoms are in one formula unit of Iron(III) chloride?
4: 3 chlorine, 1 iron. One mole contains 6.02214076 × 10²³ formula units, so a mole of Iron(III) chloride contains 4 × 6.022 × 10²³ atoms in total.