Apr 01, 2008 · mass of known -> moles of known (via the molar mass of known) -> find molar ratio between known and unknown -> mass of unknown (via the molar mass of unknown) mole-mole: moles of known-> molar ratio between known and unknown-> moles of unknown (answer)

It will calculate the total mass along with the elemental composition and mass of each element in the compound. Use uppercase for the first character in the element and lowercase for the second character. Examples: Fe, Au, Co, Br, C, O, N, F. You can use parenthesis or brackets []. Finding Molar Mass. Read our article on how to calculate molar ...More about Atomic Mass of Iron A close look at the electronic configuration of lighter elements reveals that those elements which had even number of protons, that is atomic number like 2He4, 6C12 etc. have their mass number twice their atomic number - except 4Be9 and 18Ar40.