Dry air consists of 78.1% nitrogen, 20.9% oxygen, 0.9% argon, 0.03% carbon dioxide, and 0.07% other gases by volume. What is the partial pressure of oxygen in air at standard pressure (760 mmHg)? Select one: a. 594 mmHg b. 236 mmHg c. 94 mmHg d. 159 mmHg e. 59 mmHg

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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.