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enot [183]
3 years ago
9

Which statement describes an important role of carbon dioxide in Earth’s atmosphere? *

Chemistry
2 answers:
Leokris [45]3 years ago
8 0

Answer:

Plants use carbon dioxide to make food.

Explanation:

maw [93]3 years ago
7 0

Answer:B

Explanation: i did it

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Circulacion de electrones en un material conductor en determinado tiempo.
barxatty [35]

Answer:

falso

Explanation:

tiempo no determinado El circulation de elctrones

4 0
2 years ago
Explain what the police siren sounds like to Jane. Explain what the police siren sounds like to John. Explain why the police sir
Ne4ueva [31]
Like siren They all sound the same
5 0
3 years ago
Read 2 more answers
Strontium oxide + ? =<br>stronium chloride​
White raven [17]

Answer:

strontium oxide + hydrochloric acid (HCL) =   strontium chloride​

8 0
2 years ago
Which of the following is true of the energy levels of electrons in shells?
anyanavicka [17]

Answer:

Option C is the correct. Valence electrons have a higher energy level than those in other filled shells

Explanation:

Electrons must lose energy to move from the first to the second shell. FALSE

The electrons always win energy to move from the first to the second shell.

All the electrons in an atom have similar energy levels FALSE.

They are not neccesary similar. In hydrogen these are the level energy -13.6 eV , -3.4 eV , -1.51 eV , -85 eV  and -54 eV

Electrons do not have potential energy, just kinetic energy. FALSE

They have both.

Valencia electrons are the last electrons in the last layer. They have as much energy as possible and are responsible for forming bonds with other elements.

8 0
3 years ago
How much faster does helium escape through a porous container than ozone?
otez555 [7]
According to Graham's Law ," the rates of effusion or diffusion of two gases are inversely proportional to the square root of their molecular masses at given pressure and temperature".

                                r₁ / r₂  =  \sqrt{M2 / M1}   ---- (1)

r₁    =  Rate of effusion of He

r₂    =  Rate of Effusion of O₃

M₁  =  Molecular Mass of He  =  4 g/mol

M₂  =  Molecular Mass of O₃  =  48 g/mol

Putting values in eq. 1,

                                r₁ / r₂  =  \sqrt{48 / 4}

                                r₁ / r₂  =  \sqrt{12}

                                r₁ / r₂  =  3.46

Result:
          Therefore, Helium will effuse 3.46 times more faster than Ozone.
4 0
3 years ago
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