What is the Thin layer around the earth in witch all living organisms exist

Serggg [28]

Answer:

i) Rusting occurs the least in tubes 2 and 3 because either of air and water which are necessary for rusting is absent in the two tubes respectively.

ii) Rusting occurs most in tube 1 because both air and water which are necessary for rusting are present.

Explanation:

Rusting is a chemical change which involves a redox reaction. During the process of rusting, metallic iron is oxidized to hydrated iron (iii) oxide by oxygen present in air.

For rusting to take place effectively, each of these three factors mist be available: metallic iron, oxygen and water.

In the figure above, the iron nails in the three tester tubes will rust to different extents based on the availability of the three factors.

In test tube 1, the iron nails will rust the most because all the three factors: metallic iron, oxygen present in air, and water are abundantly present.

In test tube 2, the iron nails will rust the least or not at all because boiling of water removes dissolved oxygen from water and the oil layer above the boiled water prevents entry of oxygen from air. Thus, the nail do not rust because one of the three factors for rusting to take place, in this instance, oxygen is absent.

In test tube 3, the iron nails rusts the least or not at all as well because moisture or water is absent. Calcium chloride, a drying agent removes all the moisture from inside the tube. Hence, even though air is present, rusting do not occur as there is no moisture or water present.

7 0

3 years ago

Where does photolysis of water occur in photosynthesis

iris [78.8K]

Answer:

Photolysis of water takes place in inner membrane of thylakoid.

Hope it helps u.

4 0

2 years ago

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Identify the genotype of the hornless cow at the top of the pedigree. Use H for hornless and h for

amm1812

Answer:

If you do the punnet square, This is would you could get, and this could determine whether the cow would be hornless or horned. In this case hornless because it is the donminint trait as well. (H)

Explanation:

h h

H Hh Hh

4 0

3 years ago

What is the purpose of cells?

Nezavi [6.7K]

Explanation:

Hey there!

The main function of cell is to make a life possible in the universe by performing various type of vital activities.
Various type of cell performes various type of activities. The same type of cell combine together to form tissue. Similarly, similar tissue combine and form organ. Now, Organs combinly form form a system and all system form a whole body. They combinly perform task for sustaining life in the universe.
Cancer are caused mainly due to abnormal growth of cells. It shows various type of symptoms. Such as;

The wounds donot heal faster, instead it may be worse.
Unwanted bleeding may occur from nose, mouth, or other parts.
You may see lump in some parts of body.(Thickness of skin).
They also may have problem of hair loss in more amount.

Hope it helps...

5 0

3 years ago

Cytokinesis occurs after _____, but events leading up to it actually begin during _____.

SpyIntel [72]

Answer: C

Explanation:

6 0

3 years ago

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