Define physical properties, and give two types of physical properties in your answer. Thx so much!

2 answers:

8 0

Physical properties are measurable physical characteristics of something that are not involved in a chemical change. The changes in the physical properties of a system can be used to describe the way it changes between momentary states. For example, colour, density, melting (and boiling) point, hardness, and electrical conductivity are all physical characteristics.

Elza [17]2 years ago

6 0

Answer:

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.

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stira [4]

Answer:

9. b

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Explanation:

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2 years ago

The specific branch of chemistry that focuses on molecules such as salts and water that constitute non-living matter, but are st

Soloha48 [4]

Answer: Inorganic chemistry

Explanation:

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2 years ago

According to the cooling curve, what is the approximate freezing point of the substance?

Dmitry_Shevchenko [17]

Correct answer: B

Cooling curve is the plot of temperature versus time as the sample is allowed to cool. In a cooling curve, we start at a temperature greater than the boiling point. At this temperature, the sample is in gaseous state. At the boiling point, there is no change in temperature as the gaseous and liquid states are in equilibrium. As the temperature reduces further, the liquid starts to condense and at the melting point of the sample the liquid undergoes phase transition to solid state. At the melting temperature, a second plateau is observed as the temperature remains unchanged. At temperatures below the melting point, the sample exists as a solid.

So from the curve, the second plateau is observed at around -111 $^{0}C$ . This point represents the phase transition from liquid to solid state.