Urea [(NH2) 2CO] is obtained from the reaction of ammonia and carbon dioxide. 2NH3 (g) + CO2 (g) → (NH2) 2CO (in water) + H2O (s) In one process, 637.2 g of NH3 and 1142 g of CO2 are reacted. a) Which of the two reactions is the limiting one? b) Calculate the mass of (NH2) 2CO formed. (N: 14; H: 1; O: 16; C: 12 g / 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.