Molar Mass of Potassium chlorate
KClO3 — 122.545 g/mol, worked out element by element.
Molar mass of Potassium chlorate, KClO₃
122.545 g/mol
Molecular weight 122.545 · 5 atoms per formula unit
Also known as: kclo3.
Decomposes on heating to give oxygen, which is the standard lab preparation of the gas.
How 122.545 g/mol is worked out
| Element | Atoms | Atomic mass | Mass | % of total |
|---|---|---|---|---|
| Oxygen | 3 | 15.999 | 47.997 | 39.17% |
| Potassium | 1 | 39.098 | 39.098 | 31.91% |
| Chlorine | 1 | 35.45 | 35.450 | 28.93% |
| Total | 5 | 122.545 | 100% |
M = 3 × 15.999 + 1 × 39.098 + 1 × 35.450 = 122.545 g/mol
Grams to moles for Potassium chlorate
| Mass | Moles | Formula units |
|---|---|---|
| 1 g | 0.0082 mol | 4.914 × 10^21 |
| 10 g | 0.0816 mol | 4.914 × 10^22 |
| 25 g | 0.2040 mol | 1.229 × 10^23 |
| 50 g | 0.4080 mol | 2.457 × 10^23 |
| 100 g | 0.8160 mol | 4.914 × 10^23 |
| 250 g | 2.0401 mol | 1.229 × 10^24 |
| 122.545 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.
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Frequently Asked Questions
What is the molar mass of Potassium chlorate?
The molar mass of Potassium chlorate (KClO3) is 122.545 g/mol. That is the sum of the standard atomic weights of all 5 atoms in one formula unit: 3 × 15.999 + 1 × 39.098 + 1 × 35.450 = 122.545.
What is the molecular weight of Potassium chlorate?
122.545 — 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 122.55 and a molar mass of 122.55 g/mol are the same answer.
How many moles are in 100 g of Potassium chlorate?
100 ÷ 122.545 = 0.8160 mol. To convert any mass to moles, divide by the molar mass; to go the other way, multiply.
What is the percent composition of Potassium chlorate?
By mass, Potassium chlorate is 39.17% oxygen, 31.91% potassium, 28.93% chlorine. Each element's share is its total mass in the formula divided by 122.545.
How many atoms are in one formula unit of Potassium chlorate?
5: 3 oxygen, 1 potassium, 1 chlorine. One mole contains 6.02214076 × 10²³ formula units, so a mole of Potassium chlorate contains 5 × 6.022 × 10²³ atoms in total.