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UkoKoshka [18]
3 years ago
9

g In photosystem II, after pigment molecules donate excited electrons to the reaction center, electrons are taken from ___ to re

place them. A. sugar B. water C. sunlight D. carbon dioxide
Chemistry
1 answer:
marysya [2.9K]3 years ago
7 0

Answer: B(water)

Explanation:

Photosystem II uses energy from light to extract electron from water molecule to fill the hole left as the energized electron passes up the chain.When the electrons are removed from the water molecules,the water molecule breaks down into oxygen gas,which bubbles away, and hydrogen ions,which are used to power ATP synthesis.

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Which of the following models represents an atom that is more reactive than the
Zanzabum

Answer:

Model A

Explanation:

Model A represents an atom that is more reactive than the others represented.

Valence electrons actually determine the reactivity of elements. They also determine the properties of elements.

Elements with one valence electron are highly reactive because they need low energy to remove them. They can either gain more electrons to become stable or they share/give out their electrons.

Therefore, Model A is the correct answer because it has one valence electron and its valence electron is farther from the nucleus thereby this makes it more reactive.

8 0
3 years ago
Explain how heat would change the density of a parcel of air
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6 0
3 years ago
Which of the following statements best describes why carbon can form a variety of organic compounds? Carbon atoms bond readily w
olga_2 [115]
Answer:
            <span>Carbon readily forms covalent bonds with other carbon atoms.

Explanation:
                   As we know approximately more than 95 % compounds, either isolated, discovered or synthesized belongs to organic compounds containing carbon atoms.
                  This great diversity of organic compounds is due to following facts.

1) Catenation:
                      Carbon has a peculiar behavior of self linkage. This self linkage of one carbon with another is called as catenation. In this way carbon can form a long chain of carbon atom. A branching can also take place when one carbon is bonded further to three of four carbon atoms.

2) Isomerism:
                     Secondly the carbon containing compounds show isomerism. In which molecular formula is same but structural formula is different. For example molecular formula C</span>₅H₁₂ can make following compounds,

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                                b)  2-Methylbutane

                                c)  2,2-Dimethylpropane

3) Multiple Bonds:
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Due to these factors carbon gets very high number of opportunities to form large number of compounds.
7 0
3 years ago
Consider the nuclear equation below.
anygoal [31]
It’s “c. +1” because the Sodium is losing a proton, which has a positive chage
7 0
3 years ago
Read 2 more answers
6) What is the electron configuration of an atom in its ground state with a
shutvik [7]

Answer: the answer is B!

Explanation:

S and p’s are valence electrons and if added, there is 7 in total !

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2 years ago
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