How many moles of HCl are in 30.6 g HCl? Express your answer in millimoles. (atomic weights: H=1.01; Cl=35.45). How many grams will 3.01 x 10^24 molecules of H2SO4 weigh? (atomic weights: H=1.01; S=32.07; O=16.0).

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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.