A toothpaste contains 0.240% by mass sodium fluoride used to prevent dental caries and 5.0% by mass KNO3 which decreases pain sensitivity. One tube contains 119g of toothpaste.  a) how many moles of NaF are in the tube of toothpaste?  b) how many floride ions, F- are in the tube of toothpaste?  c) How many grams of soduim ion, Na+ are in 1.50 g of toothpaste? d) how many KNO3 formula are in the tube of toothpaste?

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.