To determine which molecules are compounds, we need to identify those that consist of more than one type of atom. A compound is defined as a substance formed when two or more different types of atoms bond together chemically.
Let’s examine each molecule:
1. NaHCO[tex]\(_3\)[/tex] (Sodium bicarbonate):
- This molecule contains four different types of atoms: sodium (Na), hydrogen (H), carbon (C), and oxygen (O).
- Since it consists of multiple types of atoms, [tex]\( NaHCO _3 \)[/tex] is a compound.
2. O[tex]\(_3\)[/tex] (Ozone):
- This molecule consists solely of oxygen (O) atoms.
- Since it consists of only one type of atom, [tex]\( O _3 \)[/tex] is not a compound.
3. Cl[tex]\(_2\)[/tex] (Chlorine gas):
- This molecule consists solely of chlorine (Cl) atoms.
- Since it consists of only one type of atom, [tex]\( Cl _2 \)[/tex] is not a compound.
4. C[tex]\(_8\)[/tex]H[tex]\(_{18}\)[/tex] (Octane):
- This molecule contains two different types of atoms: carbon (C) and hydrogen (H).
- Since it consists of multiple types of atoms, [tex]\( C _8 H _{18} \)[/tex] is a compound.
Therefore, the two molecules that are compounds are:
- [tex]\( NaHCO _3 \)[/tex]
- [tex]\( C _8 H _{18} \)[/tex]
