For each of the following chemical reactions, provide the following three items: (1) the chemical formulas of all the reactants and products including physical states—e.g., O₂(?), H₂O(?), Fe(?), NaCl(??), (2) the balanced equation including physical states, and (3) the classification of the reaction as a combination, decomposition, single replacement, double replacement, or combustion. Gaseous dicarbon tetrahydride reacts with dioxygen gas to produce carbon dioxide gas and water vapor. Aqueous aluminum nitrate and magnesium metal react to produce aqueous magnesium nitrate and solid aluminum. Solid tetraphosphorus reacts with dichlorine gas to form solid phosphorus pentachloride. Under appropriate conditions, solid calcium chlorate converts into dioxygen gas and solid calcium chloride. Aqueous potassium sulfide and aqueous zinc iodide react to form solid zinc sulfide and aqueous potassium iodide. Dinitrogen gas and copper metal form from heated solid copper(I) nitride.

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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.