English Vocabulary Flash Cards - Chemical Formulas @ englishpdf.com and englishteststore.com File 141 K2CO3 potassium carbonate K2CrO4 potassium chromate K2Cr2O7 potassium dichromate K2[CuCl4] potassium tetrachlorocuprate(II) K2MoO4 potassium orthomolybdate K2MoS4 potassium thiomolybdate K2Na2 dipotassium disodium K2 O potassium oxide