Molar Mass of PH3 (Phosphine)

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 PH3?

Answer

M(PH3) =
33.998 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
Pphosphorus130.97430.974 w ≈ 91.11%
Hhydrogen31.00803.0240 w ≈ 8.89%
Σ = 33.998 g/mol w = 100%

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

Mass fractions of the elements

H 8.89%

Related Calculations

See Also

Recalculate with different values ↑

Molar masses of substances nearby

FormulaM, g/mol
CH₃OH (methanol)32.042
N₂H₄ (hydrazine)32.046
S (sulfur)32.06
PH₃ (phosphine)33.998
H₂O₂ (hydrogen peroxide)34.014
CH₃F (fluoromethane)34.033
H₂S (hydrogen sulfide)34.08

FAQ

What is the molar mass of PH3?

M(PH₃) = 33.998 g/mol

How to calculate the molar mass of PH₃?

Add up the atomic weights of all the atoms in the formula: 30.974 + 3 × 1.0080 = 33.998 g/mol.

How many grams are in 2 moles of PH₃?

m = n × M = 2 mol × 33.998 g/mol = 67.996 g.

See Also