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To aid in the prevention of tooth decay, it is recommended that drinking water contain 1.00 ppm fluoride (F-).

(a) How many grams of F- must be added to a cylindrical water reservoir having a diameter of 8.88 × 102 m and a depth of 78.88 m? (b) How many grams of sodium fluoride, NaF, contain this much fluoride?

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