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Chemistry

1 answer:

dangina [55]3 years ago

5 0

The stuff goes up into the air and polite it causing climate change

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1. Select the more electronegative element in this pair. a. F b. Br 2. Select the more electronegative element in this pair. a.

nignag [31]

Answer:

Explanation

The key explanation here is that we need to know the trends in electronegativity value increase or decrease across the periods and down the group.

Across the periods, electronegativity is expected to increase. Hence, with the exception of the noble gases, the most electronegative elements are found further right on the periodic table. While electronegativity is expected to increase across the period, it decreases down the group.

Hence, if two elements are in the same group, further down we have the one with the less electronegative value. If two elements are in the same period, further right we have the more electronegative element.

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3 years ago

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Cytochromes are critical participants in the electron transport chains used in photosynthesis and cellular respiration. How do c

goblinko [34]

Answer:

4) Each cytochrome has an iron‑containing heme group that accepts electrons and then donates the electrons to a more electronegative substance.

Explanation:

The cytochromes are proteins that contain heme prosthetic groups. Cytochromes undergo oxidation and reduction through loss or gain of a single electron by the iron atom in the heme of the cytochrome:

$Cytochrome-Fe²⁺ ⇄ cytochrome-Fe³⁺-e⁻$

The reduced form of ubiquinone (QH₂), an extraordinarily mobile transporter, transfers electrons to cytochrome reductase, a complex that contains cytochromes b and c₁, and a Fe-S center. This second complex reduces cytochrome c, a water-soluble membrane peripheral protein. Cytochrome c, like ubiquinone (Q), is a mobile electron transporter, which is transferred to cytochrome oxidase. This third complex contains the cytochromes a, a₃ and two copper ions. Heme iron and a copper ion of this oxidase transfer electrons to O₂, as the last acceptor, to form water.

Each transporter "downstream" is more electronegative than its neighbor "upstream"; oxygen is located in the inferior part of the chain. Thus, the electrons fall in an energetic gradient in the electron chain transport to a more stable localization in the electronegative oxygen atom.

7 0

3 years ago

PH of 6.7X10^-4 of H2SO4

mezya [45]

Assuming 6.7x10^-4 is in units of molarity, simply do -log(M)=pH. Substitute and get -log(6.7x10^-4) and when solving you find 3.17 is the pH

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3 years ago

How is ethanol made from sugar soloution. What is the process called?

Mice21 [21]

Answer:Ethanol can be made by a process called fermentation. During fermentation, sugar (glucose) from plant material is converted into ethanol and carbon dioxide. ... 90 per cent of the world's ethanol is made using fermentation.

Explanation:

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3 years ago

I'm trying to do question number 2.56

Lunna [17]

The answer is in the picture which is given below:

8 0

3 years ago