Calculate molar mass (calculate molecular weight, Molar Mass Calculator).Formula:Na2S2O3.9h2o -- 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: Na2S2O3.9h2o
Molar Mass: 320.2298 g/mol        1g=3.12275746979201E-03 mol
Percent composition (by mass):
Element  Count           Atom Mass                %(by mass)
Na                2                  22.9898                       14.36%
S                  2                  32.06                         20.02%
O                  3                  15.999                        14.99%
h                  18                1.0079                        5.67%
o                  9                  15.999                        44.96%

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