English Vocabulary Flash Cards - Chemical Formulas @ englishpdf.com and englishteststore.com File 131 Hg(C7H5O2)2 · H2O mercury(II) benzoate - monohydrate HgClO4 · 4H2O mercury(I) perchlorate - tetrahydrate Hg(ClO4)2 · 3H2O mercury(II) perchlorate - trihydrate HgCl2 mercury(II) chloride Hg(IO3)2 mercury(II) iodate HgI2 mercury(II) iodide Hg(NO3)2 · H2O mercury(II) nitrate - monohydrate HgO mercury(II) oxide