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Lynna [10]
3 years ago
15

How could you use a model to show the cause-and-effect relationship between Earth's rotation and the apparent motion of the star

s across the night sky?
Chemistry
2 answers:
Masteriza [31]3 years ago
7 0

Question:

How could you use a model to show the cause-and-effect relationship between Earth's rotation and the apparent motion of the stars across the night sky?

Answer:

Gravity? or density because of the pull from the sun.

fomenos3 years ago
5 0
Using a model you can rotate the objects seeing it’s rotation if you know that the earth rotates opposite of the sun then you know that the stars move with the sun by a gravitational pull.
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Answer:

2.2 moles

Explanation:

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n=2.2 moles

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What is the mole fraction of acetic acid in a solution containing 2 moles of vinegar and 3 moles of water? A. 2 B. 3 C. 0.4 D. 0
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Answer:

C. 0.4.

Explanation:

<em>∵ mole fraction of acetic acid (X acetic acid) = (no. of moles acetic acid)/(total no. of moles) = (no. of moles acetic acid)/(no. of moles of acetic acid + no. of moles of water).</em>

<em></em>

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- Total no. of moles = no. of moles of acetic acid + no. of moles of water = 2 + 3 = 5.

<em>∴ mole fraction of acetic acid (X acetic acid) = (no. of moles acetic acid)/(total no. of moles) =</em> (2)/(5)<em> = 0.4.</em>

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