Inside an industrial unit, the hourly average concentration of NO2 is measured at 0.12 ppm (by volume). Assume (i) 1 mol of an ideal gas at 1 atm and 25°C occupies 24.46 L of volume and, (ii) the molecular weights of Nitrogen (N₂) and Oxygen (O₂) are 28 and 32 respectively. From the data, the estimated concentration (in ug/m³, rounded off to two decimal places) of NO₂ at 25°C and 1 atm pressure is

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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.