Molar Mass of Lactic acid
C3H6O3 — 90.078 g/mol, worked out element by element.
Molar mass of Lactic acid, C₃H₆O₃
90.078 g/mol
Molecular weight 90.078 · 12 atoms per formula unit
Also known as: c3h6o3.
Produced by muscles working anaerobically, and by the bacteria that sour milk.
How 90.078 g/mol is worked out
| Element | Atoms | Atomic mass | Mass | % of total |
|---|---|---|---|---|
| Oxygen | 3 | 15.999 | 47.997 | 53.28% |
| Carbon | 3 | 12.011 | 36.033 | 40.00% |
| Hydrogen | 6 | 1.008 | 6.048 | 6.71% |
| Total | 12 | 90.078 | 100% |
M = 3 × 15.999 + 3 × 12.011 + 6 × 1.008 = 90.078 g/mol
Grams to moles for Lactic acid
| Mass | Moles | Formula units |
|---|---|---|
| 1 g | 0.0111 mol | 6.685 × 10^21 |
| 10 g | 0.1110 mol | 6.685 × 10^22 |
| 25 g | 0.2775 mol | 1.671 × 10^23 |
| 50 g | 0.5551 mol | 3.343 × 10^23 |
| 100 g | 1.1101 mol | 6.685 × 10^23 |
| 250 g | 2.7754 mol | 1.671 × 10^24 |
| 90.078 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.
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Frequently Asked Questions
What is the molar mass of Lactic acid?
The molar mass of Lactic acid (C3H6O3) is 90.078 g/mol. That is the sum of the standard atomic weights of all 12 atoms in one formula unit: 3 × 15.999 + 3 × 12.011 + 6 × 1.008 = 90.078.
What is the molecular weight of Lactic acid?
90.078 — 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 90.08 and a molar mass of 90.08 g/mol are the same answer.
How many moles are in 100 g of Lactic acid?
100 ÷ 90.078 = 1.1101 mol. To convert any mass to moles, divide by the molar mass; to go the other way, multiply.
What is the percent composition of Lactic acid?
By mass, Lactic acid is 53.28% oxygen, 40.00% carbon, 6.71% hydrogen. Each element's share is its total mass in the formula divided by 90.078.
How many atoms are in one formula unit of Lactic acid?
12: 3 oxygen, 3 carbon, 6 hydrogen. One mole contains 6.02214076 × 10²³ formula units, so a mole of Lactic acid contains 12 × 6.022 × 10²³ atoms in total.