A toothpaste contains 0.240% by mass sodium fluoride used to prevent tooth decay and 0.30%...

A toothpaste contains 0.240% by mass sodium fluoride used to prevent tooth decay and 0.30% by mass triclosan, C12H7Cl3O2, a preservative and antigingivitis agent. One tube contains 119 g of toothpaste. (7.1, 7.2, 7.3, 7.4)

a. How many moles of NaF are in the tube of toothpaste?

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b. How many fluoride ions, F−, are in the tube of toothpaste?

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c. How many grams of sodium ion, Na+, are in 1.50 g of toothpaste?

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d. How many molecules of triclosan are in the tube of toothpaste?

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e. What is the mass percent composition of triclosan?