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finlep [7]
4 years ago
14

The Earth's moon is unusually large. Two popular theories of the moon's origin include the "sister world" hypothesis, which stat

es that the moon formed from the same materials as the Earth, near enough to the Earth that they fell into orbit around each other. A second theory is the "capture" hypothesis, in which the moon formed elsewhere in the Solar system, and the Earth's gravity pulled it into its orbit. Studies of what the moon is made of indicate that some of its materials had to come from the Earth or from the same area of the Solar system where the Earth had formed. At the same time, the moon does not contain much of the material that makes up the Earth's core, so the moon could not have formed from the same materials as the Earth. How do the two facts above affect the described theories of the moon's origin? A. They show that scientists will never agree on where the moon came from. B. They show that more experiments on moon formation need to be done. C. They show that no theory accounts for the existence of the moon. D. They show that neither theory is complete and entirely correct.
Chemistry
2 answers:
Verizon [17]4 years ago
8 0

Answer: D. They show that neither theory is complete and entirely correct.

Explanation:

Theory is the set of rules and principles that describe and explain a particular phenomenon (the existence of the moon in this case) and is subject to changes as new evidence emerges that gives meaning to it.

In this sense, there are many theories about the Earth's moon formation and two of the "accepted" theories are described before the question. In addition, both theories explain in a certain way the reason why the Moon is predominantly composed of elements similar to those found on Earth.

However, both theories seem to be incomplete when trying to explain our Moon's origin.

Alex787 [66]4 years ago
4 0

Answer:

d

Explanation:

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Sodium metal reacts with water to produce hydrogen gas.
Darina [25.2K]

Answer:

Explanation:

Question 6 options:

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A single replacement reaction takes place because sodium is less reactive than hydroxide ions.

7 0
3 years ago
600 s after initiation of a first order reaction 48.5% of the initial reactant concentration remains present. What is the rate c
Ludmilka [50]

Answer:

k=1.20x10^{-3} s^{-1}

Explanation:

For a first order reaction the rate law is:

v=\frac{-d[A]}{[A]}=k[A]

Integranting both sides of the equation we get:

\int\limits^a_b {\frac{d[A]}{[A]}} \, dx =-k\int\limits^t_0 {} \, dt

where "a" stands for [A] (molar concentration of a given reagent) and "b" is {A]0 (initial molar concentration of a given reagent), "t" is the time in seconds.

From that integral we get the integrated rate law:

ln\frac{[A]}{[A]_{0} } =-kt

[A]=[A]_{0}e^{-kt}

ln[A]=ln[A]_{0} -kt

k=\frac{ln[A]_{0}-ln[A]}{t}

therefore k is

k=\frac{ln1-ln0,485}{600}=1,20x10^{-3}

8 0
4 years ago
The prefix hmomo comes from the Greek word that means " the same or alike". Predict the meaning of the prefix hetero.
monitta
Hetero means different. Examples could be heterogenous (different in form) or heterozygous (having two different forms of a gene).
4 0
3 years ago
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kodGreya [7K]

Answer:

12,742 km

Explanation:

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Answer:

This question is incomplete

The completed question is below

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Carbon monoxide (CO) and nitric oxide (NO) are both reactive oxides. They are both polar and inorganic also, hence should have some similar properties (based on there origin/composition and polarity).

Sulphur dioxide (SO₂) is polar because it's a bent molecule, methane (CH₄) is non-polar because of the tetrahedral shape of it's molecule. Methane is an organic molecule while sulphur dioxide is an inorganic molecule.

From the above, <u>it can be deduced that SO₂ and CH₄ are expected to have different properties</u>. For example, the polarity of SO₂ makes it dissolve in water to form an acidic solution while methane does not dissolve in water and hence doesn't form an acidic solution.

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3 years ago
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