Calculate molar mass (calculate molecular weight, Molar Mass Calculator).Formula:Fe8O -- e-Tools Age

	Calculate molar mass
	Enter a chemical formula in the field below, pay attention to formula is case sensitive!!!	The formula should be entered as: H₂SO₄= H2SO4 CuSO₄.5H2O=CuSO4.5H2O 3BeO.Al2O₃.6SiO₂= (BeO)3.Al2O3.6SiO2

Calculations:
Formula: Fe8O
Molar Mass: 462.719 g/mol        1g=2.16113883371982E-03 mol
Percent composition (by mass):
Element  Count           Atom Mass                %(by mass)
Fe                8                  55.84                         96.54%
O                  1                  15.999                        3.46%

Top Use: Molar Mass Calculator Formula: Co2(Cr2O7)3 Recent user inquiry: 1/7/2026 16:07Molar Mass Calculator Formula: Co3(PO4)2.8H2O 1/7/2026 16:07Molar Mass Calculator Formula: c4h18o 1/7/2026 16:07Molar Mass Calculator Formula: C32H22N6Na2O6S2 1/7/2026 16:07Molar Mass Calculator Formula: PO4Na3 1/7/2026 16:07Molar Mass Calculator Formula: (K2C4O8).(2H2O)