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faltersainse [42]
4 years ago
8

Which of the following is used to calculate the distance to a star based on subtle shifts in the star's position relative to an

observer on Earth
Chemistry
1 answer:
Nana76 [90]4 years ago
8 0
Parrallax is used to calculate the distance.
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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?
antoniya [11.8K]

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.

4 0
3 years ago
Scientists learn about the universe by studying the light that comes to Earth from stars and other objects in space. If you were
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there's really no specific answer but mine would be...

1. how does that light show from earth?

2. will that light ever dim?

3. are some stars bright but just not bright enough that we can see?

7 0
3 years ago
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Differences in ocean water density are larger at low latitudes near the equator because the water temperature changes often thro
andriy [413]

The density is the mass of a substance per unit volume. The surface water density is higher at the poles, and lower at the equator. Thus, the statement is false.

<h3>What is the relation between density and latitude?</h3>

The latitude is the distance from the poles. As moving down from the equator, the temperature increases. The increase in temperature at the equator allows larger mass to accumulate in a unit volume of water.

The larger mass-to-volume ratio results in the increased density of the water.

Thus, the ocean water has a higher density at the equator than poles, due to temperature differences. Therefore, the given statement is false.

Learn more about surface water density, here:

brainly.com/question/2968053

8 0
2 years ago
A secondary alcohol has a hydroxyl group bonded to a(n) ________. carbon bonded to one alkyl group carbon bonded to two alkyl gr
Leya [2.2K]
A secondary alcohol has a hydroxyl group bonded to a disubstituted carbon bonded to one alkyl group carbon bonded to two alkyl groups carbon bonded to three alkyl groups aromatic carbon.
An alkene in which the doubly bonded carbons are bonded to a total of two carbon atoms, its a distributed alkene.
7 0
4 years ago
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netineya [11]

Answer:

water is not the chemical hope ur help

8 0
3 years ago
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