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Molar massEthanol
Molar mass of C2H5OH (Ethanol)
The molar mass of C2H5OH is 46.07 g/mol.
The alcohol in drinks and a common fuel and solvent.
Step-by-step calculation
Add up the atomic masses of every atom in the formula:
2 × 12.011 + 6 × 1.008 + 1 × 15.999 = 46.07 g/mol
| Element | Atoms | Atomic mass (u) | Subtotal (g/mol) | % by mass |
|---|---|---|---|---|
| Carbon (C) | 2 | 12.011 | 24.022 | 52.14% |
| Hydrogen (H) | 6 | 1.008 | 6.048 | 13.13% |
| Oxygen (O) | 1 | 15.999 | 15.999 | 34.73% |
| Molar mass of C2H5OH | 46.07 g/mol | |||
Moles to grams for C2H5OH
Multiply the number of moles by 46.07 g/mol to get the mass, and divide a mass by 46.07 g/mol to get the moles.
| Amount (mol) | Mass (g) | Mass (g) | Amount (mol) |
|---|---|---|---|
| 0.1 mol | 4.61 g | 1 g | 0.0217 mol |
| 0.25 mol | 11.52 g | 5 g | 0.1085 mol |
| 0.5 mol | 23.03 g | 10 g | 0.2171 mol |
| 1 mol | 46.07 g | 50 g | 1.0853 mol |
| 2 mol | 92.14 g | 100 g | 2.1707 mol |
| 5 mol | 230.35 g | 500 g | 10.8533 mol |
Experiments that use ethanol
⚖️ Calculate any other formulaFrequently asked questions
What is the molar mass of C2H5OH?
The molar mass of C₂H₅OH (ethanol) is 46.07 g/mol, so one mole of ethanol weighs 46.07 grams.
How do you calculate the molar mass of C2H5OH?
Multiply each element’s atomic mass by the number of atoms in the formula and add the results: 2 × 12.011 + 6 × 1.008 + 1 × 15.999 = 46.07 g/mol.
What percentage of C2H5OH is carbon?
Carbon makes up 52.14% of the mass of C₂H₅OH.
How many grams are in one mole of C2H5OH?
One mole of C₂H₅OH has a mass of 46.07 grams, and contains 6.022 × 10²³ formula units.