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Diano4ka-milaya [45]
3 years ago
13

How does the distance between the planet Earth and the Sun compare with the distances between the planet Earth and other stars?

A. The Sun and all the other stars are the same distance from Earth. B. About half of the other stars are closer to Earth than the Sun. C. The Sun is many thousands of times closer to Earth than any other star. D. The other stars are many thousands of times closer to Earth than the Sun.
Chemistry
2 answers:
Paha777 [63]3 years ago
7 0
I think C, but I could be wrong
Virty [35]3 years ago
4 0

the correct answer is C


The average distance from the Earth to the Sun is approximately 150 million kilometers. Proxima Centauri is the next closest star to Earth, and it is located approximately 40 trillion kilometers away.

It takes only a few minutes for light from the Sun to reach the Earth, but it takes a few years for light from Proxima Centauri to reach the Earth. Also, it would take thousands of years for the fastest rocket to travel from the Earth to Proxima Centauri.  (study Island)


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Answer: The answer is D :)

Explanation:

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3 years ago
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1) A potassium carbonate hydrate has a formula K2CO3.XH2O. 10g of the hydrate leave 7.83g of anhydrous salt upon heating. Deduce
OLEGan [10]

The formula of the hydrated potassium carbonate salt is K₂CO₃.2H₂O

Based on the calculated mass ratio of carbon and oxygen in carbon dioxide, carbon has a fixed composition.

<h3>What are hydrated compounds?</h3>

Hydrated compounds are compounds that contain one or more molecules of water physically combined with a molecule of the compound.

The formula of the hydrated potassium carbonate salt is determined as follows:

Mass of the hydrated sample = 10.0 g

Mass of anhydrous salt = 7.83

mass of water = 10 - 7.83

mass of water = 2.17 g

Molar mass of water = 18.0 g

Molar mass of anhydrous potassium carbonate = 138 g

moles of anhydrous potassium carbonate in sample = 7.83/138

moles of anhydrous potassium carbonate = 0.056 moles

moles of water in the hydrated salt = 2.17/18

moles of water in the hydrated salt = 0.12

Mole ratio of water to anhydrous salt = 0.12/0.056

Mole ratio of water to anhydrous salt = 1 : 2

Formula of hydrated salt = K₂CO₃.2H₂O

The mass ratio of carbon to oxygen in the compounds is given below:

Sample 1:

Mass ratio = 3.62 / (13.26 - 3.62)

Mass ratio = 0.38 : 1

Sample 2:

Mass ratio = 5.91 / (21.66 - 5.91)

Mass ratio = 0.38 : 1

Sample 3:

Mass ratio = 7.07 / (25.91 - 7.07)

Mass ratio = 0.38 : 1

Carbon has a fixed composition.

Learn more about hydrated compounds at: brainly.com/question/11112492

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