Question

Which two molecules are compounds? NaHCO3 O3 Cl2 C8H18

Answer 1

NaHCO3 and C8H18. I think

Answer 2

Answer : The correct options are,
`NaHCO_3` and
`C_8H_(18)`

Explanation :

Molecules of element : It is defined as a pure substance that is composed of atoms of similar elements.

For example :
`H_2,Cl_2,O_3` 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 :
`H_2O`

Form the given options,
`NaHCO_3` and
`C_8H_(18)` are the compounds. While the other options,
`O_3` and
`Cl_2` are the molecule of elements.

Hence, the correct options are,
`NaHCO_3` and
`C_8H_(18)`