Nonredox combination reaction

A nonredox combination reaction that takes place in the atmosphere contributes to the acid rain problem. An air pollutant caUed sulfur trioxide (SO3) reacts with water vapor and forms sulfuric acid. The reaction is represented by Equahon 5.18 ... 

No O.N. changes take place therefore, the reaction is nonredox. Because two substances combine to form a third, the reaction is a combination reaction. 

Combination reactions, also called addition or synthesis reactions, are characterized by two or more reactants that form a single componnd as a product. Combination reactions can be redox or nonredox. 

Classify each of the reactions represented by the following equations, first as a redox or nomedox reaction. Then further classify each redox reaction as a decomposition, single-replacement, or combination reaction, and each nonredox reaction as a decomposition, double-replacement, or combination reaction ... 

Classify reactions into the categories of redox or nonredox, then into the categories of decomposition, combination, single replacement, or double replacement. 

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