Molar Mass of CO₂
Carbon dioxide. One carbon and two oxygens. At 0 °C and 1 atm, one mole occupies about 22.4 L as an ideal gas.
Molar mass of CO2
44.009 g/mol
1 × 12.011 + 2 × 15.999 = 44.009
Calculation, element by element
| Element | Atoms | Atomic mass (g/mol) | Subtotal | Mass % |
|---|---|---|---|---|
| Carbon (C) | 1 | 12.011 | 12.011 | 27.29% |
| Oxygen (O) | 2 | 15.999 | 31.998 | 72.71% |
| Total | 44.009 | 100% |
= 0.22723 mol = 1.3684 × 1023 formula units
CO₂ molar mass FAQ
What is the molar mass of carbon dioxide (CO₂)?
44.009 g/mol. It is the sum of the atomic masses of every atom in the formula: 1 × 12.011 + 2 × 15.999 = 44.009 g/mol.
How many grams are in one mole of CO₂?
44.009 g. Molar mass is the mass of one mole (6.022 × 10²³ formula units), so 1 mol of CO₂ weighs 44.009 g and 0.5 mol weighs 22.005 g.
How many moles are in 10 g of CO₂?
10 g ÷ 44.009 g/mol = 0.2272 mol.
What is the percent composition of CO₂?
Carbon 27.29%, Oxygen 72.71%.
Is molecular weight the same as molar mass for CO₂?
Numerically yes: the molecular (or formula) weight is 44.009 u per formula unit, and the molar mass is 44.009 g/mol.
Molar masses of other common compounds
H2O WaterNaCl Sodium chlorideNaOH Sodium hydroxideC6H12O6 GlucoseHCl Hydrochloric acidH2SO4 Sulfuric acidO2 Oxygen gasCaCO3 Calcium carbonateC2H5OH EthanolNH3 AmmoniaN2 Nitrogen gasCH4 MethaneCuSO4 Copper(II) sulfateKMnO4 Potassium permanganateMgCl2 Magnesium chlorideCuSO4·5H2O Copper(II) sulfate pentahydrateNaHCO3 Sodium bicarbonateNa2CO3 Sodium carbonateKCl Potassium chlorideHNO3 Nitric acidH3PO4 Phosphoric acidCH3COOH Acetic acidC12H22O11 SucroseH2O2 Hydrogen peroxideCa(OH)2 Calcium hydroxideFe2O3 Iron(III) oxideAl2O3 Aluminium oxideAgNO3 Silver nitrateNH4NO3 Ammonium nitrateC8H10N4O2 CaffeineC9H8O4 AspirinC3H8 PropaneC8H18 OctaneH2 Hydrogen gasCl2 Chlorine gasO3 OzoneCO Carbon monoxideSO2 Sulfur dioxideKOH Potassium hydroxideMgO Magnesium oxideCaCl2 Calcium chlorideNaNO3 Sodium nitrateK2Cr2O7 Potassium dichromateBaSO4 Barium sulfate