text: wats the color of.......? k2so4.cr2(so4)3.24h2o     i2(g)     o3 hno2 cr3+ and v2o5 hydrated chromium trisulphated pottassium sulphate--------yellow  iodine(gas)---------blue  trioxide---------no color  hydrogen nitrate---------brown  chromiun ion and vanadium oxide---------red  i just guess it^_^