e6503375_009__Tanpa_Klasifikasi_Lugansk__3
[0] 105. [1] The well is located at the village outskirts. It has the stone walls, cover; the common bucket is absent. The nearest area is not covered. The square of water mirror is 0,5 m2, depth 20 m. How many grams of chloric lime containing 25\% of active chlorine is it necessary to use for well disinfecting if chlorine demand of water is 2 mg/dm3? [2] *80 g [4] 40 g [5] 60 g [6] 100 g [3] 
20 g
Krok 2009: Tanpa Klasifikasi Lugansk
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