determine the mass percent of napthalene, NaCl, and sand from the following data. Also determine the total percent recovery. Mass of Beaker1: 45.845 g Mass of Beaker1 + sample: 47.500 g Mass of Beaker1 + sample after heating: 46.748 g Mass of filter paper: 2.000 g Mass of filter paper + sand: 2.574 g Mass of Beaker2 + boiling stone: 65.600 g Mass of Beaker2 + boiling stone + dried salt: 65.865 g

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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.