Molar Mass of Methanol
CH3OH — 32.042 g/mol, worked out element by element.
Molar mass of Methanol, CH₃OH
32.042 g/mol
Molecular weight 32.042 · 6 atoms per formula unit
Also known as: ch3oh, methyl alcohol, wood alcohol.
One carbon shorter than ethanol and metabolised to formaldehyde, which is why it blinds.
How 32.042 g/mol is worked out
| Element | Atoms | Atomic mass | Mass | % of total |
|---|---|---|---|---|
| Oxygen | 1 | 15.999 | 15.999 | 49.93% |
| Carbon | 1 | 12.011 | 12.011 | 37.49% |
| Hydrogen | 4 | 1.008 | 4.032 | 12.58% |
| Total | 6 | 32.042 | 100% |
M = 1 × 15.999 + 1 × 12.011 + 4 × 1.008 = 32.042 g/mol
Grams to moles for Methanol
| Mass | Moles | Formula units |
|---|---|---|
| 1 g | 0.0312 mol | 1.879 × 10^22 |
| 10 g | 0.3121 mol | 1.879 × 10^23 |
| 25 g | 0.7802 mol | 4.699 × 10^23 |
| 50 g | 1.5605 mol | 9.397 × 10^23 |
| 100 g | 3.1209 mol | 1.879 × 10^24 |
| 250 g | 7.8023 mol | 4.699 × 10^24 |
| 32.042 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
Can't find the exact calculator you need?
Describe it in one sentence — get a working, math-verified calculator in seconds. Free, no signup.
Build your own calculatorRelated Calculators
Frequently Asked Questions
What is the molar mass of Methanol?
The molar mass of Methanol (CH3OH) is 32.042 g/mol. That is the sum of the standard atomic weights of all 6 atoms in one formula unit: 1 × 15.999 + 1 × 12.011 + 4 × 1.008 = 32.042.
What is the molecular weight of Methanol?
32.042 — 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 32.04 and a molar mass of 32.04 g/mol are the same answer.
How many moles are in 100 g of Methanol?
100 ÷ 32.042 = 3.1209 mol. To convert any mass to moles, divide by the molar mass; to go the other way, multiply.
What is the percent composition of Methanol?
By mass, Methanol is 49.93% oxygen, 37.49% carbon, 12.58% hydrogen. Each element's share is its total mass in the formula divided by 32.042.
How many atoms are in one formula unit of Methanol?
6: 1 oxygen, 1 carbon, 4 hydrogen. One mole contains 6.02214076 × 10²³ formula units, so a mole of Methanol contains 6 × 6.022 × 10²³ atoms in total.