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To aid in the prevention of tooth decay, it is recommended that drinking water contain 0.900...

To aid in the prevention of tooth decay, it is recommended that drinking water contain 0.900 ppm fluoride (F–).

(a) How many grams of F– must be added to a cylindrical water reservoir having a diameter of 6.44 × 102 m and a depth of 47.26 m?

(b) How many grams of sodium fluoride, NaF, contain this much fluoride?

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