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Lelu [443]
2 years ago
15

Some scientific evidence suggests that our universe is ever-expanding from a hot and dense initial state. Briefly describe at le

ast one piece of evidence that supports the theory known as the Big Bang.
Chemistry
2 answers:
Alex73 [517]2 years ago
8 0
Cosmic microwave background radiation (CMBR) is one piece of evidence for the big bang
Romashka [77]2 years ago
6 0

Answer:

<h2>Cosmic microwave background and Hubble's Law.</h2>

Explanation:

Microwave background is basically electromagnetic radiation, but it's the remanent from earlier periods of the universe, they are the oldest electromagnetic wave in the Universe. Also, Hubble's Law says that the Universe faster galaxies are those are further away, because they belong to the first period of the explosion.

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The compound sodium carbonate is a strong electrolyte. Write the reaction when solid sodium carbonate is put into water:
Ludmilka [50]

The compound sodium carbonate is a strong electrolyte because it completely dissociates when placed in water into its component ions. The equation of the reaction can be expressed as:

Na_2CO_3_{(s)} ---> 2 Na^+_{(aq)} + CO_3^{(2+)}_{(aq)}

The dissociation leads to the formation of sodium and carbonate ions with the latter held together by its internal covalent bond.

This is unlike weak electrolytes that do not dissociate completely in water or aqueous solutions. Only a small fraction of the solute exists as ions in the solution.

More on strong and weak electrolytes can be found here: brainly.com/question/3410548

7 0
3 years ago
Which of the following is NOT a way that biodiversity is important to an ecosystem?
Vitek1552 [10]

Answer:

A. Biodiversity can increase the rate of extinction

Explanation:

That statement is false because variety is better for a better ecosystem. With variety more can survive in certain situations that others cant.

5 0
3 years ago
Plz help ASAP
Artemon [7]

Answer: A 2.1

Explanation:

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3 years ago
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Licemer1 [7]

Answer:

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Explanation:

5 0
3 years ago
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Write the lewis structure for ch2clcoo−. assign a formal charge for any atom with a non-zero formal charge.
Murljashka [212]
The Lewis structure of Chloroacetate (H₂CClCO₂) is given below. In structure it is shown that carbon has a double bond with one oxygen atom and two single bonds with CH₂Cl and O⁻.

Formal Charge;
                        Formal charge is caculated as,

Formal charge  =  # of valence e⁻ - [# of lone pair of e⁻ + 1/2 # of bonded e⁻]

Formal charge on Oxygen (Highlighted Red);

Formal charge  =  6 - [ 6 + 2/2]

Formal charge  =  6 - [6 + 1]

Formal charge  =  6 - [7]

Formal charge  =  -1

8 0
2 years ago
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