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To determine which molecules are compounds, we need to understand what constitutes a compound. A compound is a substance made up of two or more different types of atoms chemically bonded together.
Let's examine each molecule:
1. [tex]\( \text{NaHCO}_3 \)[/tex] (Sodium Bicarbonate):
- This molecule consists of four different types of atoms: Sodium (Na), Hydrogen (H), Carbon (C), and Oxygen (O).
- Since it contains multiple different types of atoms, it qualifies as a compound.
2. [tex]\( \text{O}_3 \)[/tex] (Ozone):
- This molecule consists only of Oxygen (O) atoms.
- Since it contains only one type of atom, it is not a compound but a form of elemental oxygen.
3. [tex]\( \text{Cl}_2 \)[/tex] (Chlorine Gas):
- This molecule consists only of Chlorine (Cl) atoms.
- Since it contains only one type of atom, it is not a compound but a diatomic molecule of chlorine.
4. [tex]\( \text{C}_8\text{H}_{18} \)[/tex] (Octane):
- This molecule consists of two different types of atoms: Carbon (C) and Hydrogen (H).
- Since it contains multiple different types of atoms, it qualifies as a compound.
In conclusion, the molecules that are compounds are:
1. [tex]\( \text{NaHCO}_3 \)[/tex]
4. [tex]\( \text{C}_8\text{H}_{18} \)[/tex]
Therefore, the correct answers are [tex]\(1\)[/tex] and [tex]\(4\)[/tex].
Let's examine each molecule:
1. [tex]\( \text{NaHCO}_3 \)[/tex] (Sodium Bicarbonate):
- This molecule consists of four different types of atoms: Sodium (Na), Hydrogen (H), Carbon (C), and Oxygen (O).
- Since it contains multiple different types of atoms, it qualifies as a compound.
2. [tex]\( \text{O}_3 \)[/tex] (Ozone):
- This molecule consists only of Oxygen (O) atoms.
- Since it contains only one type of atom, it is not a compound but a form of elemental oxygen.
3. [tex]\( \text{Cl}_2 \)[/tex] (Chlorine Gas):
- This molecule consists only of Chlorine (Cl) atoms.
- Since it contains only one type of atom, it is not a compound but a diatomic molecule of chlorine.
4. [tex]\( \text{C}_8\text{H}_{18} \)[/tex] (Octane):
- This molecule consists of two different types of atoms: Carbon (C) and Hydrogen (H).
- Since it contains multiple different types of atoms, it qualifies as a compound.
In conclusion, the molecules that are compounds are:
1. [tex]\( \text{NaHCO}_3 \)[/tex]
4. [tex]\( \text{C}_8\text{H}_{18} \)[/tex]
Therefore, the correct answers are [tex]\(1\)[/tex] and [tex]\(4\)[/tex].
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