(a) When the metallic element sodium combines with thenonmetallic element bromine, Br21l2, what is the chemicalformula of the product? (b) Is the product a solid, liquid, orgas at room temperature? (c) In the balanced chemical equationfor this reaction, what is the coefficient in front of theproduct if the coefficient in front of Br21l2 is 1?

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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.