Question

pregunta 5 (4 puntos)
(01.06 mc)
during an experiment, iron powder and sulfur powder were mixed thoroughly and placed on a filter paper. when a magnet was moved below the filter
paper, the iron filings stood up vertically as they were attracted by the magnet. the sulfur powder showed no change in position. which of the
following correctly justifies the observation?
o a
iron and sulfur formed a compound, therefore they lost their individual properties.
o b
iron and sulfur formed a compound, therefore they retained their individual properties.
o c
iron powder and sulfur powder combined physically, therefore they lost their individual properties.
o d
iron powder and sulfur powder combined physically, therefore they retained their individual properties.

Explanation:

En una mezcla física, como la del polvo de hierro y el polvo de azufre, las sustancias no reaccionan químicamente entre sí. Esto significa que cada una de ellas conserva sus propiedades individuales. En este caso, el polvo de hierro (que es magnético) se adhiere al imán, mientras que el azufre (que no es magnético) no muestra cambios. Si hubiera sido una reacción química (formación de un compuesto), ambas sustancias habrían perdido sus propiedades individuales. Pero como es una mezcla física (combinación física), retienen sus propiedades.

Answer:

d. Iron powder and sulfur powder combined physically, therefore they retained their individual properties.