When copper metal is added to nitric acid, the following reaction takes place Cu (s) + 4 HNO, (aq) → Cu(NO,), (aq) + 2 H,0 (1) + 2 NO, (g) Calculate the volume in liters of NO, gas collected over water at 25.0 °C when 8.85 g of copper is added to excess nitric acid if the total pressure is 726.0 mmHg. The vapor pressure of water at 25.0 °C is 23.8 mm Hg.

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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.