Calculate molar mass (calculate molecular weight, Molar Mass Calculator).Formula:MgCl2.H12O2 -- 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: MgCl2.H12O2
Molar Mass: 139.3038 g/mol        1g=7.17855507172094E-03 mol
Percent composition (by mass):
Element  Count           Atom Mass                %(by mass)
Mg                1                  24.305                        17.45%
Cl                2                  35.453                        50.9%
H                  12                1.0079                        8.68%
O                  2                  15.999                        22.97%

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