Molar Mass of Hydrogen gas
H2 — 2.016 g/mol, worked out element by element.
Molar mass of Hydrogen gas, H₂
2.016 g/mol
Molecular weight 2.016 · 2 atoms per formula unit
Also known as: h2, dihydrogen.
The lightest molecule, and the one whose molar volume anchors gas-law worked examples.
How 2.016 g/mol is worked out
| Element | Atoms | Atomic mass | Mass | % of total |
|---|---|---|---|---|
| Hydrogen | 2 | 1.008 | 2.016 | 100.00% |
| Total | 2 | 2.016 | 100% |
M = 2 × 1.008 = 2.016 g/mol
Grams to moles for Hydrogen gas
| Mass | Moles | Formula units |
|---|---|---|
| 1 g | 0.4960 mol | 2.987 × 10^23 |
| 10 g | 4.9603 mol | 2.987 × 10^24 |
| 25 g | 12.4008 mol | 7.468 × 10^24 |
| 50 g | 24.8016 mol | 1.494 × 10^25 |
| 100 g | 49.6032 mol | 2.987 × 10^25 |
| 250 g | 124.0079 mol | 7.468 × 10^25 |
| 2.016 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.
Related compounds
Can't find the exact calculator you need?
Describe it in one sentence — get a working, math-verified calculator in seconds. Free, no signup.
Build your own calculatorRelated Calculators
Frequently Asked Questions
What is the molar mass of Hydrogen gas?
The molar mass of Hydrogen gas (H2) is 2.016 g/mol. That is the sum of the standard atomic weights of all 2 atoms in one formula unit: 2 × 1.008 = 2.016.
What is the molecular weight of Hydrogen gas?
2.016 — 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 2.02 and a molar mass of 2.02 g/mol are the same answer.
How many moles are in 100 g of Hydrogen gas?
100 ÷ 2.016 = 49.6032 mol. To convert any mass to moles, divide by the molar mass; to go the other way, multiply.
What is the percent composition of Hydrogen gas?
By mass, Hydrogen gas is 100.00% hydrogen. Each element's share is its total mass in the formula divided by 2.016.
How many atoms are in one formula unit of Hydrogen gas?
2: 2 hydrogen. One mole contains 6.02214076 × 10²³ formula units, so a mole of Hydrogen gas contains 2 × 6.022 × 10²³ atoms in total.