Calculate molar mass (calculate molecular weight, Molar Mass Calculator).Formula:Na2B8O13 -- 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: Na2B8O13
Molar Mass: 340.4546 g/mol        1g=2.93724919563431E-03 mol
Percent composition (by mass):
Element  Count           Atom Mass                %(by mass)
Na                2                  22.9898                       13.51%
B                  8                  10.811                        25.4%
O                  13                15.999                        61.09%

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