Starting billions of years ago, in what way did algae change the atmosphere

Chemistry

1 answer:

ikadub [295]3 years ago

7 0

Answer:

Option (C)

Explanation:

In the primitive world, about billions of years back, the initially formed organisms such as algae, were responsible for the production of large amount of oxygen in the atmosphere. This was possible by these algae, as they were able to carry out the process of photosynthesis, where the food is synthesized in the presence of sunlight, water and carbon dioxide (CO₂), and in return, it generates food and oxygen, on which the organisms are dependent on.

Thus, these algae were responsible for the changes in the atmosphere, by converting carbon dioxide (CO₂) into oxygen.

So, the correct answer is option (C).

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Which equation represents a conservation of atoms? Group of answer choices LaTeX: 4Fe\:+3O_2\:\longrightarrow\:2Fe_2O_3 4 F e +

slamgirl [31]

Answer : The equation represents a conservation of atoms is:

$4Fe+3O_2\rightarrow 2Fe_2O_3$

Explanation :

Law of conservation of matter : It states that matter can neither be created nor be destroyed but it can only be transformed from one form to another form.

The balanced chemical reaction always follow the law of conservation of matter.

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.

(1) The given chemical reaction is,

$4Fe+3O_2\rightarrow 2Fe_2O_3$

This reaction is a balanced chemical reaction in which number of atoms of iron and oxygen are equal on the both side of the reaction. So, this reaction obey the law of conservation of matter.

(2) The given chemical reaction is,

$2Fe+2O_2\rightarrow 2Fe_2O_3$

This reaction is an unbalanced chemical reaction in which number of atoms of iron and oxygen are not equal on the both side of the reaction. So, this reaction does not obey the law of conservation of matter.

(3) The given chemical reaction is,

$4Fe+2O_2\rightarrow 2Fe_2O_3$

This reaction is an unbalanced chemical reaction in which number of atoms of oxygen are not equal on the both side of the reaction. So, this reaction does not obey the law of conservation of matter.

Hence, the equation represents a conservation of atoms is:

$4Fe+3O_2\rightarrow 2Fe_2O_3$

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<span>An element belonging to the halogen family would be expected to have a large ionization energy and a large electron affinity.
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The amount of energy released when an electron is added to an atom or molecule to form a negative ion or anion is electron affinity.</span>Chlorine from this family has highest electron affinity.

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G'day love! An elements atomic number is the amount of protons in an element!

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What was thompson working with when he discovered the cathode rays?

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He was working with electrons

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