Activity 2. Write a balanced molecular equation describing each of the following chemical reactions. A. Solid calcium carbonate is heated and decomposes to solid calcium oxide and carbon dioxide gas. B. Gaseous butane, C+H10, reacts with diatomic oxygen gas to yield gaseous carbon dioxide and water vapor. C. Aqueous solutions of magnesium chloride and sodium hydroxide react to produce solid magnesium hydroxide and aqueous sodium chloride. D. Water vapor reacts with sodium metal to produce solid sodium hydroxide and hydrogen gas.

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Q: • C. Decomposition

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Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.