Calculate molar mass (calculate molecular weight, Molar Mass Calculator).Formula:H4Mg3Si2O9 -- 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: H4Mg3Si2O9
Molar Mass: 277.1076 g/mol        1g=3.6087065096735E-03 mol
Percent composition (by mass):
Element  Count           Atom Mass                %(by mass)
H                  4                  1.0079                        1.45%
Mg                3                  24.305                        26.31%
Si                2                  28.085                        20.27%
O                  9                  15.999                        51.96%

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