Molar Mass of Se (Selenium)

Molar Mass Calculator
Chemical formula Write symbols with a capital letter: CoCl2 is cobalt chloride, COCl2 is phosgene. A hydrate takes a dot: CuSO4·5H2O or CuSO4.5H2O

What is the molar mass of Se?

Answer

M(Se) =
78.971 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024).

Contribution of each element
Element Atoms, n Atomic weight, A n × A, g/mol Mass fraction, w
Seselenium178.97178.971 w = 100.00%

Atomic weights: CIAAW, Abridged Standard Atomic Weights (2024)

See Also

Recalculate with different values ↑

Neighbouring elements of the periodic table

FormulaM, g/mol
Ga (gallium)69.723
Ge (germanium)72.630
As (arsenic)74.922
Se (selenium)78.971
Br (bromine)79.904
Kr (krypton)83.798
Rb (rubidium)85.468

FAQ

What is the molar mass of Se?

M(Se) = 78.971 g/mol

How is the molar mass of selenium different from its atomic weight?

Only in units: the relative atomic mass Ar(Se) = 78.971 has no unit, and the molar mass M(Se) = 78.971 g/mol is the mass of one mole of atoms (6.022 × 10²³ of them).

How many grams are in 2 moles of Se?

m = n × M = 2 mol × 78.971 g/mol = 157.942 g.

See Also