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Calculate molar mass

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Enter a chemical formula in the field below, pay attention to formula is case sensitive!!!
            The formula should be entered as:
H2SO4= H2SO4
3BeO.Al2O3.6SiO2= (BeO)3.Al2O3.6SiO2
Formula: (NH4)2Cr3O7
Molar Mass: 304.0582 g/mol        1g=3.28884404367322E-03 mol
Percent composition (by mass):
Element  Count           Atom Mass                %(by mass)
N                  2                  14.007                        9.21%
H                  8                  1.0079                        2.65%
Cr                3                  51.996                        51.3%
O                  7                  15.999                        36.83%

Top Use:    Molar Mass Calculator     Formula:  Co2(Cr2O7)3

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