Urea [(NH2)2CO] is prepared by reacting ammonia with carbon dioxide          2NH3 (g) + CO2 (g) ------> (NH2)2 CO (aq) + H2O (l) In one process, 700 g of NH3 are treated with 1253 g of CO2. Which one is the limiting reactant? Calculate the mass of urea [(NH2)2CO] formed. How much excess reagent (in grams) is left at the end of the reaction?

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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.