kayumajoy31 kayumajoy31 18-04-2021 Chemistry contestada 2. A 0.45g sample of mineral ore is analyzed for chromium and found to contain0.560mg Cr2O3. Express the concentration of Cr2O3 in the sample as:(a) Percent (%)(b) Parts per thousand (ppt)(c) Parts per million (ppm)(d) Parts per billion (ppb)