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Sodium Fluoride (NaF) Is Added to Drinking Water in Some

Question 14

Multiple Choice

Sodium fluoride (NaF) is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca10(PO4) 6(OH) 2, into more stable fluorapatite, Ca10(PO4) 6F2. The molar mass of hydroxyapatite is 502 g/mol. What is the molarity of a 10.0 mg/L sodium fluoride solution?


A) 2.38 Sodium fluoride (NaF) is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>(OH) <sub>2</sub>, into more stable fluorapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>F<sub>2</sub>. The molar mass of hydroxyapatite is 502 g/mol. What is the molarity of a 10.0 mg/L sodium fluoride solution? A) 2.38 M B) 1.99 M C) 2.63 M D) 1.19 M E) 0.263 M Sodium fluoride (NaF) is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>(OH) <sub>2</sub>, into more stable fluorapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>F<sub>2</sub>. The molar mass of hydroxyapatite is 502 g/mol. What is the molarity of a 10.0 mg/L sodium fluoride solution? A) 2.38 M B) 1.99 M C) 2.63 M D) 1.19 M E) 0.263 M M
B) 1.99 Sodium fluoride (NaF) is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>(OH) <sub>2</sub>, into more stable fluorapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>F<sub>2</sub>. The molar mass of hydroxyapatite is 502 g/mol. What is the molarity of a 10.0 mg/L sodium fluoride solution? A) 2.38 M B) 1.99 M C) 2.63 M D) 1.19 M E) 0.263 M Sodium fluoride (NaF) is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>(OH) <sub>2</sub>, into more stable fluorapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>F<sub>2</sub>. The molar mass of hydroxyapatite is 502 g/mol. What is the molarity of a 10.0 mg/L sodium fluoride solution? A) 2.38 M B) 1.99 M C) 2.63 M D) 1.19 M E) 0.263 M M
C) 2.63 Sodium fluoride (NaF) is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>(OH) <sub>2</sub>, into more stable fluorapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>F<sub>2</sub>. The molar mass of hydroxyapatite is 502 g/mol. What is the molarity of a 10.0 mg/L sodium fluoride solution? A) 2.38 M B) 1.99 M C) 2.63 M D) 1.19 M E) 0.263 M Sodium fluoride (NaF) is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>(OH) <sub>2</sub>, into more stable fluorapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>F<sub>2</sub>. The molar mass of hydroxyapatite is 502 g/mol. What is the molarity of a 10.0 mg/L sodium fluoride solution? A) 2.38 M B) 1.99 M C) 2.63 M D) 1.19 M E) 0.263 M M
D) 1.19 Sodium fluoride (NaF) is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>(OH) <sub>2</sub>, into more stable fluorapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>F<sub>2</sub>. The molar mass of hydroxyapatite is 502 g/mol. What is the molarity of a 10.0 mg/L sodium fluoride solution? A) 2.38 M B) 1.99 M C) 2.63 M D) 1.19 M E) 0.263 M Sodium fluoride (NaF) is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>(OH) <sub>2</sub>, into more stable fluorapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>F<sub>2</sub>. The molar mass of hydroxyapatite is 502 g/mol. What is the molarity of a 10.0 mg/L sodium fluoride solution? A) 2.38 M B) 1.99 M C) 2.63 M D) 1.19 M E) 0.263 M M
E) 0.263 M

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