prov:value
| - um, chlorine, iodine and cobalt, etc. and exemplified by the compounds such as potassium nitrate, sodium nitrate, ammonium nitrate, ammonium chloride, potassium chloride, calcium chloride, potassium monohydrogen phosphate, sodium dihydrogen phosphate, magnesium sulfate, magnesium chloride, sodium sulfate, ferrous sulfate, ferric sulfate, manganese sulfate, copper sulfate, sodium molybdate, molybde
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