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lefthandeddolan
20.07.2019 •
Chemistry
Why do we use the term "formula unit" rather than "molecule" when we refer to the simplest repeating unit of an ionic solid?
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Ответ:
NH₃ :
Ammonia is a covalent compound which contains three covalent bonds between N and three H's. One molecule of Ammonia can exist independently, so it is possible to find a single molecule of NH₃ comprising of one nitrogen and three hydrogen atoms bonded covalently.
NaCl:
Sodium chloride is made up of Na⁺ and Cl⁻ ions. Now, the formula NaCl is not molecular formula, instead it is a formula unit. Formula unit means that this compound consists of giant structure of Na⁺ ions and Cl⁻. There numbers can not be counted but the ratio of these two ions to each other is countable and for each Na⁻ ion there is one Cl⁻ ion. Hence, Formula unit is an Empirical formula of any Ionic compound.
Ответ:
It is released in a series of reactions.
It is used by cells for repair and growth.