Calculate molar mass (calculate molecular weight, Molar Mass Calculator).Formula:C10H9 -- 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: C10H9
Molar Mass: 129.1811 g/mol        1g=7.74107048167263E-03 mol
Percent composition (by mass):
Element  Count           Atom Mass                %(by mass)
C                  10                12.011                        92.98%
H                  9                  1.0079                        7.02%

Top Use: Molar Mass Calculator Formula: Co2(Cr2O7)3 Recent user inquiry: 11/4/2025 20:57Molar Mass Calculator Formula: HgCo(scn)4 11/4/2025 20:57Molar Mass Calculator Formula: C16H8N4 11/4/2025 20:57Molar Mass Calculator Formula: Al(HCO3)3 11/4/2025 20:57Molar Mass Calculator Formula: Cl2 11/4/2025 20:57Molar Mass Calculator Formula: c6h6o2n2