Enter the concentration (in g/L or related units), volume, and molar mass into the calculator to determine the moles (amount of substance). If you already know the mass in grams, use the Mass ↔ Moles tab.
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G/L To Moles Formula
The following formula is used to calculate moles from a mass concentration in grams per liter (g/L), the solution volume in liters, and the molar mass.
n = \frac{C \cdot L}{M}Variables:
- n is the number of moles (mol)
- C is the mass concentration in grams per liter (g/L)
- L is the solution volume in liters (L)
- M is the molar mass in grams per mole (g/mol)
To calculate the number of moles from a g/L concentration, multiply the concentration by the volume to get grams, then divide by the molar mass: n = (C · L) / M. If you already know the mass directly in grams (not g/L), use n = m / M (volume is not needed).
| Grams (g) | Moles (mol) |
|---|---|
| 0.05 | 0.000856 |
| 0.10 | 0.001711 |
| 0.20 | 0.003422 |
| 0.25 | 0.004278 |
| 0.50 | 0.008555 |
| 0.75 | 0.012833 |
| 1 | 0.017111 |
| 2 | 0.034222 |
| 3 | 0.051332 |
| 5 | 0.085554 |
| 10 | 0.171108 |
| 12.5 | 0.213884 |
| 15 | 0.256661 |
| 20 | 0.342215 |
| 25 | 0.427769 |
| 50 | 0.855538 |
| 100 | 1.711076 |
| 250 | 4.277689 |
| 500 | 8.555378 |
| 1000 | 17.110756 |
| *Assumes Sodium Chloride (NaCl). Molar mass M = 58.44277 g/mol. Conversion: n = m / M; thus 1 g ≈ 0.01711076 mol. | |
What is G/L To Moles?
G/L to moles is a conversion used in chemistry to determine the amount of substance (in moles) from a mass concentration (grams per liter), a solution volume, and the substance’s molar mass. It is commonly used when you know a solution’s concentration and need to find how many moles of solute are present in a given volume.
How to Calculate G/L To Moles?
The following steps outline how to calculate the moles from concentration (g/L), liters, and molar mass.
- First, determine the concentration of the substance (C) in g/L.
- Next, determine the volume of the solution in liters (L).
- Next, determine the molar mass of the substance (M) in g/mol.
- Finally, calculate the number of moles using the formula n = (C * L) / M.
- After inserting the values and calculating the result, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
Concentration of the substance (C) = 50 g/L
Volume of the solution (L) = 2
Molar mass of the substance (M) = 25 g/mol
n = (50 g/L × 2 L) / (25 g/mol) = 4 mol