Calculate molar mass (calculate molecular weight, Molar Mass Calculator).Formula:Fe(NO3)3.9 -- 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: Fe(NO3)3.9
Molar Mass: 250.852 g/mol        1g=3.98641430006538E-03 mol
Percent composition (by mass):
Element  Count           Atom Mass                %(by mass)
Fe                1.2              55.84                         25.85%
N                  3.6              14.007                        20.34%
O                  9.6              15.999                        60.99%

Top Use: Molar Mass Calculator Formula: Co2(Cr2O7)3 Recent user inquiry: 9/22/2025 02:05Molar Mass Calculator Formula: 12s 9/22/2025 02:05Molar Mass Calculator Formula: Cu(MnO4)2 9/22/2025 02:05Molar Mass Calculator Formula: Fe( No3)3 9/22/2025 02:05Molar Mass Calculator Formula: GdPO4 9/22/2025 02:05Molar Mass Calculator Formula: POCl3