Answer : The correct options are, [tex]NaHCO_3[/tex] and [tex]C_8H_{18}[/tex]
Explanation :
Molecules of element : It is defined as a pure substance that is composed of atoms of similar elements.
For example : [tex]H_2,Cl_2,O_3[/tex] etc.
Molecule of compound : It is defined as a pure substance that is made from atoms of different elements combined together in a fixed ratio by mass.
For example : [tex]H_2O[/tex]
Form the given options, [tex]NaHCO_3[/tex] and [tex]C_8H_{18}[/tex] are the compounds. While the other options, [tex]O_3[/tex] and [tex]Cl_2[/tex] are the molecule of elements.
Hence, the correct options are, [tex]NaHCO_3[/tex] and [tex]C_8H_{18}[/tex]
