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cestrela7 [59]
2 years ago
12

Which of the following systems has potential energy only?

Chemistry
1 answer:
DIA [1.3K]2 years ago
6 0

Answer:

a bird sitting on a branch

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What does the reaction rate say about a reaction?
miss Akunina [59]

Answer:

It shows the change in concentration of a reactant or product per unit of time, expressed as mol/(L · s)

Explanation:

The reaction rate is the speed at which a chemical reaction proceeds.

So if the reaction rate is the speed at which a chemical reaction happens/occurs, then the reaction rate will tell us about the concertation of the chemicals. It shows the change in concentration of a reactant or product per unit of time, expressed as mol/(L · s)

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3 years ago
Which best describes sodium chloride (NaCl)?
aksik [14]

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there is a little something called poop.

Explanation:

about that rasputia.

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2 years ago
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What is the Lewis dot diagram structure for PI2F
Brut [27]

Answer:

Please find attached the completed Lewis dot diagram structure for PI₂F

Explanation:

The number of valence electrons are;

Phosphorus = 5 Electrons

Iodine = 2 × 7 electrons = 14 electrons

Chlorine = 7 electrons

The total number of valence electrons = 14 + 7 + 5 = 26 electrons

2) We draw the symbol that represents the basic (general) structure of the molecule as follows;

The sheared electron pair are represented by single bond lines

3) We complete the octet structures round the fluorine and the iodine atoms as attached showing 18 electrons plus 6 shared electron pairs, with a maximum from step 2 to give a total of (18 + 6) 24 electron pairs

4) We add the 2 unaccounted valence electron on the phosphorus atom to give it the stable octet structure, which gives the completed Lewis structure

3 0
3 years ago
What is emitted when an electron returns to its lower energy level?
Yakvenalex [24]

Answer:

When the electron changes levels, it decreases energy and the atom emits photons. The photon is emitted with the electron moving from a higher energy level to a lower energy level. The energy of the photon is the exact energy that is lost by the electron moving to its lower energy level.

Explanation:

4 0
2 years ago
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Someone please answer
BARSIC [14]

1) 100s of millions of years ago Trees and plants fall into swamps

2) Layers of rotting plant matter builds up underwater

3) Over millions of years the weight of layers heat the plant matter and turn into Peat

4) Over millions of years more pressure and heat turns Peat into coal

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