Calculate molar mass (calculate molecular weight, Molar Mass Calculator).Formula:Na2S2O3.7H2O -- 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: Na2S2O3.7H2O
Molar Mass: 284.2002 g/mol        1g=3.5186463626697E-03 mol
Percent composition (by mass):
Element  Count           Atom Mass                %(by mass)
Na                2                  22.9898                       16.18%
S                  2                  32.06                         22.56%
O                  10                15.999                        56.29%
H                  14                1.0079                        4.97%

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