BreBreDoeCCx
19.11.2019 •
Chemistry
Which compound contains both covalent and ionic bonds?
a. ncl3 b. naf c. hcn d. nh4oh
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Ответ:
Explanation:
A covalent bond is formed when an element shares its valence electron with another element. This bond is formed between two non metals.
An ionic bond is formed when an element completely transfers its valence electron to another element. The element which donates the electron is known as electropositive element or the metal and the element which accepts the electrons is known as electronegative element or non metal.
a.
contain covalent bonds as they are made up of non metals only.
b.
contain ionic bonds as they are made up of sodium metal and fluorine non metal.
c.
contain covalent bonds as they are made up of non metals only.
d.
contain ionic bonds between 
and 
and covalent between N and H in 
Learn more about ionic and covalent bonds
link
link
Ответ:
acid has the pH less than 7 i.e. 1 to 6 while base has the pH more than 7 i.e. 8 to 14.
Examples of acid are HCL, HNO3, H2SO4.
Examples of base are NaOH, KOH
Explanation: