Question

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

Answer 1

The scientist observed a blue liquid with a density of 1.2 g/cm³ that reacts with carbon dioxide. The blue color and reaction with carbon dioxide are characteristic properties of the substance, but density is not.

Step-by-step explanation:

The properties observed by the scientist are:

• Blue color
• Density of 1.2 g/cm³
• Reaction with carbon dioxide

The blue color and reaction with carbon dioxide are characteristic properties of the unknown substance.

However, density is not a characteristic property, as different substances can have the same density.

Answer 2

Characteristic properties can be used to describe and identify the substances, while non-characteristic properties, although can be used to describe the substances, cannot be used to identify them.

Temperature, mass, color, shape and volume are examples of non-characteristic properties.

Density, boiling point, melting point, chemical reactivity are examples of characteristic properties.

List of the properties observed by the scientist:
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Property Type of property
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Volume: 5 ml non-characteristic
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Color: blue non-characteristic
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State: liquid characteristic
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density: 1.2 g/cm characteristic
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Reaction: reacts with CO2 characteristic
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