Chemistry · Reactions
Molar Mass Calculator
The molar mass is the mass of one mole of a substance, found by adding up the atomic masses of all its atoms.
Molar mass of H2SO4
98.072 g/mol
| Element | Atoms | Atomic mass | Subtotal |
|---|---|---|---|
| H | 2 | 1.008 | 2.016 |
| S | 1 | 32.06 | 32.06 |
| O | 4 | 15.999 | 63.996 |
Uses IUPAC standard atomic masses. School textbooks often round them (H = 1, C = 12, O = 16), so your book’s answer may differ slightly — for example water is 18 g/mol in the book and 18.015 g/mol here.
Try this
- Find the molar mass of water, H2O.
- Try glucose, C6H12O6.
- Try a hydrate like CuSO4·5H2O.
Key ideas
- Molar mass = sum of (atomic mass × number of atoms).
- Units: grams per mole (g/mol).
- One mole contains 6.022 × 10²³ particles.