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E 1.0 ml 21. Fertiliser residues are sometimes found in drinking water in rural areas. For compound Z, the safe limit for drinking water is

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E 1.0 ml 21. Fertiliser residues are sometimes found in drinking water in rural areas. For compound Z, the safe limit for drinking water is 9 ppm. Analytical results for the amount of compound Z in the drinking water of various villages are given below. Which ONE of the following villages has drinking water that is safe to drink? A Toome: 24.6 micrograms/ml B Blackhill: 0.3 mg/L C Drumhowan: 0.009% w/v D Magheracloone: 0.041% w/v TE DOS E Annagassan: 1 in 100 000

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