The volume of a sample of hydrogen gas was decreased from 13.82 L to 7.11 L at constant temperature. If the final pressure exerted by the hydrogen gas sample was 6.29 atm, what pressure did the hydrogen gas exert before its volume was decreased? P = atm

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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.