Question

Помогите пожалуйста) это тест1.Ковалентная полярная связь в молекуле1)HCl2)NaCl3)H24)CaCl25)Cl2 2.Соляная кислота вступает в реакцию с оксидом:1)Кремния(4)2)Углерода(4)3)Азота(2)4)Углерода(2)5)Железа(2)

Answer 1

1) HCl
2) FeO (под цифрой 5)

Answer 2

Covalent Polar Bond in a Molecule:

A covalent polar bond occurs when two atoms share electrons unequally, resulting in a partial positive charge on one atom and a partial negative charge on the other. In the given options, the molecule that exhibits a covalent polar bond is HCl. In this molecule, hydrogen (H) and chlorine (Cl) share electrons, but chlorine has a higher electronegativity than hydrogen, causing the chlorine atom to pull the shared electrons closer to itself. As a result, the chlorine atom becomes partially negative, while the hydrogen atom becomes partially positive.

Reaction of Hydrochloric Acid with Oxide:

Hydrochloric acid (HCl) can react with various oxides. Among the options provided, the oxide that reacts with hydrochloric acid is silicon dioxide (SiO2). When hydrochloric acid reacts with silicon dioxide, it forms silicon chloride (SiCl4) and water (H2O). The balanced chemical equation for this reaction is:

SiO2 + 4HCl → SiCl4 + 2H2O.

It is important to note that hydrochloric acid can react with other oxides as well, but in this case, silicon dioxide is the specific oxide mentioned.

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