Calculate molar mass (calculate molecular weight, Molar Mass Calculator).Formula:C2H7AsO2 -- 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: C2H7AsO2
Molar Mass: 137.9969 g/mol        1g=7.24653959617933E-03 mol
Percent composition (by mass):
Element  Count           Atom Mass                %(by mass)
C                  2                  12.011                        17.41%
H                  7                  1.0079                        5.11%
As                1                  74.9216                       54.29%
O                  2                  15.999                        23.19%

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