Question

scientist observes a 5-mL sample of
an unknown substance. It is a blue liquid with a
density of 1.2 g/cm3. The substance reacts with
carbon dioxide. List each of the properties of
matter the scientist observed and whether it is a
characteristic property of matter

Answer 1

Given what we know about the characteristics of matter and the observations given by the question, we can confirm that the characteristic properties observed by the scientists are the color, density, and the reaction of the liquid with carbon dioxide.

When we mention the properties of matter, we are speaking in general terms. Anything we can observe can be a property of the matter, such as:

• Color
• Shape
• Mass
• Density

and etc. However, not all properties are characteristic properties of matter. These properties are reserved for those that do not change. Therefore, they are properties that can be used to identify matter.

Of the options listed, the properties that can be considered characteristic of this type of matter are the density, the color, and the reaction it has in the presence of carbon dioxide. This is because these properties will be the same anytime we have a sample of this matter, regardless of its mass, shape, or quantity.

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