Molar Mass of Formic acid
HCOOH — 46.025 g/mol, worked out element by element.
Molar mass of Formic acid, HCOOH
46.025 g/mol
Molecular weight 46.025 · 5 atoms per formula unit
Also known as: hcooh, methanoic acid.
The simplest carboxylic acid, and the compound ants inject when they bite.
How 46.025 g/mol is worked out
| Element | Atoms | Atomic mass | Mass | % of total |
|---|---|---|---|---|
| Oxygen | 2 | 15.999 | 31.998 | 69.52% |
| Carbon | 1 | 12.011 | 12.011 | 26.10% |
| Hydrogen | 2 | 1.008 | 2.016 | 4.38% |
| Total | 5 | 46.025 | 100% |
M = 2 × 15.999 + 1 × 12.011 + 2 × 1.008 = 46.025 g/mol
Grams to moles for Formic acid
| Mass | Moles | Formula units |
|---|---|---|
| 1 g | 0.0217 mol | 1.308 × 10^22 |
| 10 g | 0.2173 mol | 1.308 × 10^23 |
| 25 g | 0.5432 mol | 3.271 × 10^23 |
| 50 g | 1.0864 mol | 6.542 × 10^23 |
| 100 g | 2.1727 mol | 1.308 × 10^24 |
| 250 g | 5.4318 mol | 3.271 × 10^24 |
| 46.025 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 Formic acid?
The molar mass of Formic acid (HCOOH) is 46.025 g/mol. That is the sum of the standard atomic weights of all 5 atoms in one formula unit: 2 × 15.999 + 1 × 12.011 + 2 × 1.008 = 46.025.
What is the molecular weight of Formic acid?
46.025 — 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 46.02 and a molar mass of 46.02 g/mol are the same answer.
How many moles are in 100 g of Formic acid?
100 ÷ 46.025 = 2.1727 mol. To convert any mass to moles, divide by the molar mass; to go the other way, multiply.
What is the percent composition of Formic acid?
By mass, Formic acid is 69.52% oxygen, 26.10% carbon, 4.38% hydrogen. Each element's share is its total mass in the formula divided by 46.025.
How many atoms are in one formula unit of Formic acid?
5: 2 oxygen, 1 carbon, 2 hydrogen. One mole contains 6.02214076 × 10²³ formula units, so a mole of Formic acid contains 5 × 6.022 × 10²³ atoms in total.