Amount of substance (mole) from mass (n = m/M)
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n = m/M
What each symbol means
| Symbol | What it stands for |
|---|---|
| M | Molar mass (g/mol) |
| m | Mass of sample (g) |
| n | Amount of substance (mol) |
When to use this
Single pure substance; M must match the formula you count (atomic for element, molecular for molecule).