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A scientist has a container with a substance inside. At first, the molecules in the substance move away from each other. Later, the
molecules move around each other
What change did the scientist observe in the substance?
A. Before, the substance was a liquid. Later, it was a solld.
B. Before, the substance was a gas, Later, it was a liquid
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C. Before, the substance was a liquid. Later, it was a gas.
D. Before, the substance was
solid. Later, it was a liquid

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njhannans15
The answers here is B) Before, the substance was a gas, later it was a liquid.

Gas particles move freely and away from each other. However, liquid particles move around each other.

Hope this helps! :)(

The change scientist observed has been that before the substance was in gaseous state, and later it was in liquid state. Thus, option B is correct.

The particles in the different state of the sample has been moving with varying speed and have varying interatomic interactions. The interactions have been changed with the change in the state of matter.

  • In the solid state, the structure of particles has been very compact, and the particles do not have a particular movement.

  • The liquid sample has been constituted of the sample particles with lesser interatomic interactions. The particles move more freely compared to the solid, around each other.

  • The gaseous particles have been constituted of the least interatomic particle's interaction. The particles are present at a  distant and move away from each other.

The sample with the scientist has prior movement of the molecules away from each other. Thus, the substance has been present in the gaseous state. The later movement of the samples has been around each other, thus the molecules has been in a liquid state.

The change scientist observed for the substance has been from gaseous state to liquid state. Thus, option B is correct.

For more information about movement of molecules, refer to the link:

https://brainly.com/question/2284581