Question 1033113: The container held the compound (As) sub four O sub 6
and What was the percentage by weight of the Arsenic in this compound (As, 75;O,16) Answer by KMST(5328) (Show Source): You can put this solution on YOUR website! The formula of the compound is , meaning that a molecule or formula unit comprises atoms of , and atoms of .
The mass of the atoms of ,
each with a mass of atomic mass units, adds up to .
The mass of the atoms of ,
each with a mass of atomic mass units, adds up to .
The total mass of the molecule is atomic mass units,
and out of that total, the mass of the arsenic is atomic mass units.
As a fraction, that is (rounding to whole numbers, or 2 significant figures, as a chemistry teacher might say).