#### Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of N2O5 is 108.0104 g/mol
Compound name is dinitrogen pentoxide

Convert between N2O5 weight and moles
 Compound Moles Weight, g N2O5

Elemental composition of N2O5
ElementSymbolAtomic weightAtomsMass percent
NitrogenN14.0067225.9358
OxygenO15.9994574.0642

 Mass percent composition Atomic percent composition

Sample reactions for N2O5
 Equation Reaction type N2O5 + H2O = HNO3 synthesis N2O5 = NO2 + O2 decomposition N2O5 = N2O4 + O2 decomposition N2O5 = N2 + O2 decomposition N2O5 + H2O = NHO3 synthesis

Formula in Hill system is N2O5

### Computing molar mass (molar weight)

To calculate molar mass of a chemical compound enter its formula and click 'Compute'. In chemical formula you may use:
• Any chemical element. Capitalize the first letter in chemical symbol and use lower case for the remaining letters: Ca, Fe, Mg, Mn, S, O, H, C, N, Na, K, Cl, Al.
• Functional groups: D, Ph, Me, Et, Bu, AcAc, For, Ts, Tos, Bz, TMS, tBu, Bzl, Bn, Dmg
• parantesis () or brackets [].
• Common compound names.
Examples of molar mass computations: NaCl, Ca(OH)2, K4[Fe(CN)6], CuSO4*5H2O, water, nitric acid, potassium permanganate, ethanol, fructose.

Molar mass calculator also displays common compound name, Hill formula, elemental composition, mass percent composition, atomic percent compositions and allows to convert from weight to number of moles and vice versa.

### Computing molecular weight (molecular mass)

To calculate molecular weight of a chemical compound enter it's formula, specify its isotope mass number after each element in square brackets.
Examples of molecular weight computations: C[14]O[16]2, S[34]O[16]2.

### Definitions of molecular mass, molecular weight, molar mass and molar weight

• Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
• Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
Weights of atoms and isotopes are from NIST article.