A teacher wants to prepare a 0 point 0 1 0 ppm solution of arsenic pentoxide in the laboratory for calibrating a water quality testing system. If the teacher uses 500 point 0 milliliters of water (which has a mass of 500 point 0 g ), what mass of arsenic pentoxide should the teacher mix to get the required solution? Use ppm is equal to mass of solute over mass of solution times 10 to the 6th power