English Vocabulary Flash Cards - Chemical Formulas @ englishpdf.com and englishteststore.com File 069 CoTiO3 cobalt(II) titanate CoWO4 cobalt(II) tungstate Co2B cobalt boride Co2SO4 cobalt(II) sulfate Co2S3 cobalt(III) sulfide Co2SiO4 cobalt(II) orthosilicate Co2SnO4 cobalt(II) stannate Co2TiO4 cobalt(II) titanite