A patient with Chronic Obstructive Pulmonary Disease, COPD, is  using a 9.0 L tank filled with oxygen to help provide the needed  oxygen to their blood. Calculate the moles of oxygen in the tank at  room temperature, 295 K, and a tank pressure of 21.4 atm (R =  0.08206 L•atm/K•mol). Express you answer as three significant  digits in moles (enter: mol).

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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.