Calculate molar mass (calculate molecular weight, Molar Mass Calculator).Formula:Na2Cr2O7-2H2O -- 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: Na2Cr2O7-2H2O
Molar Mass: 277.9794 g/mol        1g=3.59738887126168E-03 mol
Percent composition (by mass):
Element  Count           Atom Mass                %(by mass)
Na                1.9              22.9898                       15.82%
Cr                2                  51.996                        36.69%
O                  7.9              15.999                        45.32%
H                  0                  1.0079                        0.01%

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