The buildings in this old mine are made of metal. You can see over 100 years, the silver color of the buildings has changed. The
2 answers:
Answer:
The correct answer is option B.
Explanation:
Iron in presence of moisture reacts with oxygen gas to from iron(III) oxide of red brown color often termed as rust.
Building material used up in min building is metal which which span of time changed its color to rust formation. Therefore this means rust or change in color is due to the iron metal which reacts with oxygen and water present in the air.
You might be interested in
Density is intensive because it is the ratio of two extensive properties that is mass to volume.
<h3>What is Density ?</h3>Density is defined as mass per unit volume. S.I unit if density is kg/m³.
It is expressed as
Density = or
Intensive property is the property which does not depend on the size of the system. Intensive property can be easily identified. Intensive property is the independent property. The size does not change in this.
Example of intensive property are Density, Freezing point, melting point, colour, Lustre, etc.
<h3>What is Extensive property ?</h3>Extensive property is the property which depend on the substance. Extensive property cannot be easily identified.
Example of extensive property length, weight, volume, mass etc.
Thus from the above conclusion we can say that Density is intensive because it is the ratio of two extensive properties that is mass to volume.
Learn more about Density here: brainly.com/question/1354972
#SPJ4
Disclaimer: The given question is incomplete on the portal. Here is the complete question.
Question: The density (d) of a substance is an intensive property that is defined as the ratio of its mass (m) to its volume (v)
density = or
Considering that mass and volume are both extensive properties, explain why their ratio, density is intensive.