Calculate molar mass (calculate molecular weight, Molar Mass Calculator).Formula:3K2Cr2O7 -- 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: 3K2Cr2O7
Molar Mass: 297.181 g/mol        1g=3.36495267194067E-03 mol
Percent composition (by mass):
Element  Count           Atom Mass                %(by mass)
K                  2.1              39.098                        27.32%
Cr                2.1              51.996                        36%
O                  7.2              15.999                        38.69%

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