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kupik [55]
3 years ago
6

What is the difference between an endangered species and a threatened species?

Chemistry
2 answers:
erastovalidia [21]3 years ago
5 0

Answer:

D. An endangered species is in danger of becoming extinct in the near future. A threatened species could become endangered in the near future.

Explanation:

Allushta [10]3 years ago
4 0
D.an endangered species is in danger of becoming extinct in the near future.a threatened species would become endangered in the near future.
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PLEASE ANSWER ASAP FOR 50 POINTS (scroll down to see the pictures for the questions)
sladkih [1.3K]
Absorption occurs when photons from incident light hit atoms and molecules and cause them to vibrate. The more an object's molecules move and vibrate, the hotter it becomes. This heat is then emitted from the object as thermal energy.
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3 years ago
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How many σ and π bonds are present in a molecule of cumulene?
dimaraw [331]

A hydrocarbon with three or more consecutive (cumulative) double bonds is known as a cumulene. They are analogous to allenes, only exhibiting a more elongated chain. The basic molecule in this category is butatriene, which is also simply known as cumulene.  

In the structure of a cumulene, there are 3 double bonds and 4 single bonds. The double bond comprises 1 sigma bond, and 1 pi bond and 4 hydrogen bond produces a sigma bond with carbon. Thus, the molecule of cumulene comprises 7 sigma bonds and 3 pi bonds.  


3 0
3 years ago
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Which one of the following statements is correct? A. A pure substance may be separated by filtration or distillation into two or
torisob [31]

Answer: Option (D) is the correct answer.

Explanation:

  • A pure substance is defined as the substance that is made up of only one type of atom or only one type of molecule.

For example, Cl_{2} is a molecule and it is a pure substance.

Also, substances that contain two or more different element which are chemically combined in a fixed ratio by mass are known as compounds. They are also pure substances.

A pure substance can only be separated by a chemical method and not by any physical method.

  • A heterogeneous mixture is defined as the mixture which contains non-uniform composition of solute particles into the solution.

For example, mud dissolved in water.

It is not necessary that two or more substance present in a heterogeneous mixture should be of same phase.

Also, it is not necessary that combination of a liquid and a solid always results in a heterogeneous mixture.

If the solid is able to dissolve completely into the liquid then it will result in a homogeneous mixture.

  • Whereas a homogeneous mixture is defined as the mixture which contains uniform distribution of solute particles into the solvent.

For example, salt dissolved in water is a homogeneous mixture.

Thus, we can conclude that the statement composition is uniform throughout a homogeneous mixture, is correct.

4 0
3 years ago
The density of platinum is 21.45 g/cm3 at 20 ∘C. Calculate the mass of 78.00 cm3 of platinum at this temperature.
sasho [114]
D = 21.45 g/cm³

V = 78.00 cm³

D = m / V

21.45 = m / 78.00

m = 21.45 x 78.00

m = 1673.1 g

hope this helps!
5 0
3 years ago
Which of these acids forms when wine is left exposed to oxygen for extended periods?
shusha [124]
Acetic acid is formed when wine is left exposed to oxygen for extended periods.
7 0
3 years ago
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