Molar Mass of Benzene
C6H6 — 78.114 g/mol, worked out element by element.
Molar mass of Benzene, C₆H₆
78.114 g/mol
Molecular weight 78.114 · 12 atoms per formula unit
Also known as: c6h6.
The aromatic ring itself; its empirical formula CH is why percent composition alone cannot identify it.
How 78.114 g/mol is worked out
| Element | Atoms | Atomic mass | Mass | % of total |
|---|---|---|---|---|
| Carbon | 6 | 12.011 | 72.066 | 92.26% |
| Hydrogen | 6 | 1.008 | 6.048 | 7.74% |
| Total | 12 | 78.114 | 100% |
M = 6 × 12.011 + 6 × 1.008 = 78.114 g/mol
Grams to moles for Benzene
| Mass | Moles | Formula units |
|---|---|---|
| 1 g | 0.0128 mol | 7.709 × 10^21 |
| 10 g | 0.1280 mol | 7.709 × 10^22 |
| 25 g | 0.3200 mol | 1.927 × 10^23 |
| 50 g | 0.6401 mol | 3.855 × 10^23 |
| 100 g | 1.2802 mol | 7.709 × 10^23 |
| 250 g | 3.2005 mol | 1.927 × 10^24 |
| 78.114 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 Benzene?
The molar mass of Benzene (C6H6) is 78.114 g/mol. That is the sum of the standard atomic weights of all 12 atoms in one formula unit: 6 × 12.011 + 6 × 1.008 = 78.114.
What is the molecular weight of Benzene?
78.114 — 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 78.11 and a molar mass of 78.11 g/mol are the same answer.
How many moles are in 100 g of Benzene?
100 ÷ 78.114 = 1.2802 mol. To convert any mass to moles, divide by the molar mass; to go the other way, multiply.
What is the percent composition of Benzene?
By mass, Benzene is 92.26% carbon, 7.74% hydrogen. Each element's share is its total mass in the formula divided by 78.114.
How many atoms are in one formula unit of Benzene?
12: 6 carbon, 6 hydrogen. One mole contains 6.02214076 × 10²³ formula units, so a mole of Benzene contains 12 × 6.022 × 10²³ atoms in total.