8. Which of the following has a greater mass? A. 2.0 atoms of lead B. 5.1 x 1023 mole lithium Write the letter of your choice and support your answer with computations. No solution, no credit. 9. Stannous fluoride (SnF₂) is often added to toothpaste as an ingredient to prevent tooth decay. What is the mass of fluorine (in grams) in 24.6 g of the compound?

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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.