the number of copper atoms in 3.0 g lump of copper is 2.8 x 1022. how many electrons are present in the sample? How much do they contribute to its mass?

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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.