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steposvetlana [31]
3 years ago
11

Earth’s cycles provide organisms with continued access to usable elements necessary for sustaining life. (True or False)

Chemistry
2 answers:
castortr0y [4]3 years ago
8 0

Answer:

True

Explanation:

There are several physical, chemical , biological and chemical –biological cycles in the earth’s atmosphere that keep on rotating the minerals with in the different segments of earth. There are several such cycles –  

a) Nitrogen cycle

b) Carbon cycle

c) Phosphorous cycle

d) Food cycle

e) Energy cycle ( trophic levels in a food web)

The primary constituents of all these cycle keep on changing their form from species to species so that these nutrient get available to all the living beings.

tensa zangetsu [6.8K]3 years ago
6 0
The answer is truer
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Lithium diisopropylamide (LDA) is used as a strong base in organic synthesis. LDA is itself prepared by an acid-base reaction be
kakasveta [241]

Explanation:

Lithium diisopropylamide (LDA) is used in many organic synthesis and is a strong base. It is prepared by the acid base reaction of N,N-diisopropylamine ( [(CH₃)₂CH]₂NH ) and butyllithium ( Li⁺⁻CH₂CH₂CH₂CH₃ ).

The equation is show below as:

[(CH₃)₂CH]₂NH + Li⁺⁻CH₂CH₂CH₂CH₃  ⇒  [(CH₃)₂CH]₂N⁻Li⁺  + CH₃CH₂CH₂CH₃

N,N-diisopropylamine ( [(CH₃)₂CH]₂NH ) is a weaker acid and hence,  LDA ( [(CH₃)₂CH]₂N⁻Li⁺ ) is stronger base. (Weaker acid has stronger conjugate base)

Butyllithium ( Li⁺⁻CH₂CH₂CH₂CH₃ ) is a very strong base and hence, butane ( CH₃CH₂CH₂CH₃ ) is a very weak acid. (Strong base has weaker conjugate acid)

5 0
3 years ago
I don’t know the answers to these pls help
stepladder [879]

Answer:

4. Option C. Pentane.

5. Option D.

Explanation:

4. Hydrocarbons are compound containing carbon and hydrogen only. Hydrocarbons are said to be saturated when they contain only carbon to carbon single bond. All alkanes are saturated hydrocarbon.

The correct answer is pentane.

5. Isomerism is the phenomenon whereby two or more compounds have the same molecular formula but different structural patterns. The compounds involved are called isomers.

A careful observation of the diagram above shows that only option D satisfied the definition of Isomerism as the two compound both have the same molecular formula as C3H8O but different structural patterns.

Note: option C does not contain isomers as Isomerism can not occur in a compound having just 1 carbon atom.

5 0
3 years ago
In the space provided, for each element, type the ionic charge of an atom with a full set of valence electrons. Then, type the n
kobusy [5.1K]

11. ionic charge +1, helium.

12. ionic charge 2-, neon.

13. ionic charge 3+, neon.

3 0
3 years ago
Is slime a solid or liquid?
Ivan

Answer:

i think its a liquid..... im not that sure

7 0
2 years ago
What is the role of the kinetic theory of matter in the process of solutes being dissolved into solvents?
hjlf

Answer:

i'd say the second choice.

Explanation:

the rise in temperature causes the particles to vibrate causing motion. they collide thus resulting to the weakening of the particles.

hope it is of use to you.

6 0
3 years ago
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