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Free_Kalibri [48]
3 years ago
12

Kevin is working on a model that shows the positions of Earth, the Moon, and the Sun during the phases of

Chemistry
2 answers:
mr_godi [17]3 years ago
6 0

Answer: A. With Earth between the Moon and the Sun.

Explanation:

sergij07 [2.7K]3 years ago
5 0

Answer:

Explanation:what’s the answer

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Which of the following statements correctly describe(s) the driving forces for diffusion of Na+ and K+ ions through their respec
melomori [17]

Question:

Which of the following statements correctly describe(s) the driving forces for diffusion of Na+ and K+ ions through their respective channels? Select all that apply.

A)The diffusion of Na+ ions into the cell is facilitated by the Na+ concentration gradient across the plasma membrane.

B)The diffusion of Na+ ions into the cell is impeded by the electrical gradient across the plasma membrane.

C)The diffusion of K+ ions out of the cell is impeded by the K+ concentration gradient across the plasma membrane.

D)The diffusion of K+ ions out of the cell is impeded by the electrical gradient across the plasma membrane. The electrochemical gradient is larger for Na+ than for K+.

Answer:

"The concentration gradient and the electro-chemical gradient" describes  the driving forces for diffusion of Na+ and K+ ions through their respective channels

Explanation:

The Na ions diffusion inside the cell is facilitated by the concentration gradient of the Na ions which is present across the plasma membrane. Hence, the diffusion of the K ions which is present outside the cell and will be impeded due to the electrical gradient which is present near the plasma membrane. Thus, the electro-chemical gradient is greater as compared to the Na ion than that of the K ion.

6 0
3 years ago
A photon has a frequency of 2.68 x 10^6 HZ calculate it's energy
Nat2105 [25]

Answer:

1.77*10^-27

Explanation:

E= hf

=6.63*10^-34 * 2.68*10^6

=1.77*10^-27

8 0
2 years ago
With a quick, sudden motion, he bends his thumb forward so that the rubber band slips off. What happens next?
Alenkinab [10]
The rubber band flies forward if on the back.  If the thumb on the front t would smack back and hit your thumb
7 0
3 years ago
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Is SiO2 London Dispersion, Dipole-Dipole, or Hydrogen Bonding?
s2008m [1.1K]

Answer:

It is Dispersion

Explanation:

hope this helps you :)

6 0
2 years ago
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describe the behavior of the molecules in a liquid. Explain this behavior in terms of intermolecular forces.
tigry1 [53]

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Molecules in liquids are held to other molecules by intermolecular interactions, which are weaker than the intramolecular interactions that hold the atoms together within molecules and polyatomic ions.

5 0
2 years ago
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