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Ulleksa [173]
3 years ago
5

What name is given to the carbon-based structures used in lubricants and nanotubes

Chemistry
2 answers:
sergejj [24]3 years ago
8 0

Answer:

Fullerene, also called buckminsterfullerene, any of a series of hollow carbon molecules that form either a closed cage (“buckyballs”) or a cylinder (carbon “nanotubes”).

Explanation:

A fullerene is an allotrope of carbon whose molecule consists of carbon atoms connected by single and double bonds to form a closed or partially closed mesh, with fused rings of five to seven atoms. The molecule may be a hollow sphere, ellipsoid, tube, or many other shapes and sizes.

Alborosie3 years ago
8 0

Answer:

khansamueen has already provided an answer.  This is an additional note on the many structures carbon may form, called allotropes.

Explanation:  Carbon can take on many forms.  They are all based only on the carbon atom, and are thus called alloptropes.  One of these is diamond, "a" in the attached image.  

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CO_2 sublimes readily at 25°C. Which properties are usually associated with a compound that undergoes this kind of change?
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Explanation:

Sublimation is defined as a process in which solid state of a substance directly changes into vapor or gaseous state without undergoing liquid phase.

For example, naphthalene balls show sublimation at room temperature.

As this process does not cause any change in chemical composition of a substance. Hence, it is known as a physical process.

Similarly, when CO_{2} sublimes readily at 25^{o}C. This shows change in physical state of carbon dioxide is taking place, i.e, from solid to gaseous phase.

Thus, we can conclude that when CO_{2} sublimes readily at 25^{o}C then it means physical properties are usually associated with a compound that undergoes this kind of change.

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Answer:

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