Molar Mass of C₉H₈O₄
Aspirin (acetylsalicylic acid). Made from salicylic acid and acetic anhydride, a classic percent-yield experiment.
Molar mass of C9H8O4
180.159 g/mol
9 × 12.011 + 8 × 1.008 + 4 × 15.999 = 180.159
Calculation, element by element
| Element | Atoms | Atomic mass (g/mol) | Subtotal | Mass % |
|---|---|---|---|---|
| Carbon (C) | 9 | 12.011 | 108.099 | 60.00% |
| Hydrogen (H) | 8 | 1.008 | 8.064 | 4.48% |
| Oxygen (O) | 4 | 15.999 | 63.996 | 35.52% |
| Total | 180.159 | 100% |
= 0.055507 mol = 3.3427 × 1022 formula units
C₉H₈O₄ molar mass FAQ
What is the molar mass of aspirin (C₉H₈O₄)?
180.159 g/mol. It is the sum of the atomic masses of every atom in the formula: 9 × 12.011 + 8 × 1.008 + 4 × 15.999 = 180.159 g/mol.
How many grams are in one mole of C₉H₈O₄?
180.159 g. Molar mass is the mass of one mole (6.022 × 10²³ formula units), so 1 mol of C₉H₈O₄ weighs 180.159 g and 0.5 mol weighs 90.079 g.
How many moles are in 10 g of C₉H₈O₄?
10 g ÷ 180.159 g/mol = 0.05551 mol.
What is the percent composition of C₉H₈O₄?
Carbon 60.00%, Hydrogen 4.48%, Oxygen 35.52%.
Is molecular weight the same as molar mass for C₉H₈O₄?
Numerically yes: the molecular (or formula) weight is 180.159 u per formula unit, and the molar mass is 180.159 g/mol.
Molar masses of other common compounds
H2O WaterNaCl Sodium chlorideNaOH Sodium hydroxideC6H12O6 GlucoseCO2 Carbon dioxideHCl 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 CaffeineC3H8 PropaneC8H18 OctaneH2 Hydrogen gasCl2 Chlorine gasO3 OzoneCO Carbon monoxideSO2 Sulfur dioxideKOH Potassium hydroxideMgO Magnesium oxideCaCl2 Calcium chlorideNaNO3 Sodium nitrateK2Cr2O7 Potassium dichromateBaSO4 Barium sulfate