Calculate molar mass (calculate molecular weight, Molar Mass Calculator).Formula:(Mn2Se7) -- 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: (Mn2Se7)
Molar Mass: 662.176 g/mol        1g=1.51017252210893E-03 mol
Percent composition (by mass):
Element  Count           Atom Mass                %(by mass)
Mn                2                  54.938                        16.59%
Se                7                  78.9                          83.41%

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