The correct answer is:
d) Dióxido de carbono
Explanation:
1. Agua y aceite (a): This is an example of a heterogeneous mixture because water and oil do not mix together and can be easily separated.
2. Sal y agua (b): This is an example of a homogeneous mixture because salt dissolves in water to form a uniform solution.
3. Limonada (c): This is also an example of a homogeneous mixture where lemon juice, water, and sugar are combined to form a uniform drink.
4. Dióxido de carbono (d): Dióxido de carbono is not an example of a mixture. It is a compound composed of carbon and oxygen atoms bonded together.
