Question

suponga que tiene un recipiente lleno de hierro y arena. puede separar el hierro de la arena si ______ así que esto es un ______.
utilizas un imán; mezcla
funde la arena; mezcla
agrega bicarbonato de sodio; compuesto químico
diluyes la arena en agua; solución

Explanation:

To separate iron from sand, a magnet can be used because iron is magnetic and sand is not. This is a physical separation method for a mixture (since iron and sand are mixed, not chemically combined). Let's analyze the options:

• Option 1: "utilizas un imán; mezcla" (use a magnet; mixture) – Using a magnet attracts iron, separating it from sand. Iron and sand form a mixture (they retain their individual properties, not chemically bonded).
• Option 2: "funde la arena" (melt sand) is not a practical or common way to separate iron from sand, and sand melting doesn't help separate iron.
• Option 3: Adding sodium bicarbonate is irrelevant to separating iron and sand.
• Option 4: Sand doesn't dissolve in water (it's insoluble), so diluting sand in water won't separate iron.

So the correct option is the one with using a magnet and identifying it as a mixture.

Answer:

A. utilizas un imán; mezcla