Question

Which of the following formulas represents a molecular (i.e. covalent) compound?

A. CaCl2


B. H2O
C.NaOH
D. LiF

Answer 1

We know that molecular formulas are made up of two nonmetals. So, if we analyze the choices, we can conclude that B. H2O is the only molecular compound out of the choices that are listed. Hope this helps and have a fantastic day!

Answer 2

Option b
`H_2O`

Step-by-step explanation:

Covalent compounds are formed by the sharing of electrons while ionic compounds are formed by transfer of electrons.

In the give compound,
`CaCl_2`, two electrons are transferred from Ca to two Cl atoms. Hence , it is an ionic compound.

In the compound,
`H_2O`, bond is formed by the sharing of electrons. Oxygen shares two of its electrons while two hydrogens share one electron each during the formation of covalent bond.

In the compound NaOH, one electron is transferred from Na. Hence it is an ionic compound.

In the compound, LiF, one electron is transferred from Li to F. hence it is an ionic compound.

Among, the given options, only
`H_2O` is a covalent compound.