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түүний сульфидын хүдрээс зэсийн зүтгүүр
төмрийн сульфидын ферро хүхэр. Төмөр ба түүний нэгдлүүд ... 8 %-ийн натрийн сульфидын 3 л уусмал (g=1, 058 г / мл) бэлтгэхийн тулд хэдэн грамм давс ба ус хэрэгтэй вэ? а. 240, 0 г Na 2 SO 3 ба 2760, 0 г ус б. 250, 8 г Na 2 SO 3 ба 2993, 2 г ус в. 253, 9 г Na 2 SO ...
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e сульфидын хүдрээс зэсийн зүтгүүр
зэсийн хүдрээс алт зэс бенфи ион. Ionbox 20m Best Home Air Ionizer Best Home Air Cleaner. 2 days ago We care about clean air The EPA estimates the air in our homes may be 2 to 5 times more polluted than the outdoors and studies show that ion generators can significantly decrease airborne viruses and bacteria in your home This is why a non …
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