Calculate molar mass (calculate molecular weight, Molar Mass Calculator).Formula:3FeO -- 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: 3FeO
Molar Mass: 74.839 g/mol        1g=0.013362017130106 mol
Percent composition (by mass):
Element  Count           Atom Mass                %(by mass)
Fe                1.1              55.84                         78.62%
O                  1.2              15.999                        25.39%

Top Use: Molar Mass Calculator Formula: Co2(Cr2O7)3 Recent user inquiry: 10/6/2025 16:12Molar Mass Calculator Formula: 217 10/6/2025 16:12Molar Mass Calculator Formula: Bi0.9Sm0.1FeO3 10/6/2025 16:12Molar Mass Calculator Formula: isn2 10/6/2025 16:12Molar Mass Calculator Formula: cuso4.2h2o 10/6/2025 16:12Molar Mass Calculator Formula: B3H2Cl