Guys please helppp with questions 1,2 and 3

At this point, most of the available energy is contained in the reduced electron carriers NADH and FADH₂.

Oxidative phosphorylation or electron transfer-associated phosphorylation or terminal oxidation is a metabolic pathway in which cells use enzymes to oxidize nutrients and release chemical energy to produce adenosine triphosphate. This takes place in mitochondria in eukaryotes.

Oxidative phosphorylation often produces the greatest amount of energy produced within the cell. The combination of glycolysis and the citric acid cycle of the Kreb cycle alone yields only four ATPs. Most or most of the remaining energy is stored in the electron carriers NADH and FADH₂.

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Answer:

Joule

Explanation:

This is the answer

Answer:

Fossil fuels, such as coal, oil, or natural gas, release carbon back into the atmosphere.

The processes would be decomposition, diffusion, erosion, respiration, and combustion.

Explanation:

Hope this helped?

The pOH of the Ca(OH)₂ solution, given that the Ca(OH)₂ solution has a molarity of 5×10⁻⁵ M is 4

We'll begin by obtaining the hydroxide ion concentration, [OH⁻] of the solution. This is given below:

Ca(OH)₂(s) <=> Ca²⁺(aq) + 2OH⁻(aq)

From the above equation,

1 mole of Ca(OH)₂ contained 2 mole of OH⁻

Therefore,

5×10⁻⁵ M Ca(OH)₂ will contain = 5×10⁻⁵ × 2 = 10×10⁻⁵ M OH⁻

Finally, we shall determine the pOH of the solution. Details below:

pOH = -Log [OH⁻]

Inputting the various parameters, we have:

pOH = -Log 10×10⁻⁵

pOH = 4

Thus, we can conclude that the pOH of the Ca(OH)₂ solution is 4

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Answer:

See explanation and Image

Explanation:

Chemical element iodine has the atomic number 53 and the letter I in its symbol. of the stable halogens that weighs the most.

Symbol: I

Atomic mass: 126.90447 u

Atomic number: 53

Electron configuration: [Kr] 4d105s25p5

(Hope it helps)

The heating curve for a pure substance is a graph that shows how the temperature changes as the pure substance is heated. At the melting or boiling point of a substance, the temperature no longer changes as energy is added until the phase change is complete.

Differences in the heat capacities and enthalpies of the phase changes determine the rate of change of temperature and how long the material will hold at a constant temperature during the phase change. Separate energy calculations are done for each step on the graph, and then the energies of all the steps are added together.

The heating curve is a graphical representation of the temperature change of a substance concerning the heat it receives. During the phase change (melting and boiling points), the temperature remains constant until the transition has taken place. The rate of temperature change and the duration of a constant temperature depend on the heat capacities and enthalpies of the phase change. Each step of the curve requires a separate energy calculation that is added up to determine the total heat needed to cause a temperature change in a substance.

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Answer:

C4H6

Explanation:

See attached table

Convert each of the masses into moles by dividing the mass by the molar mass of that element.  That yields 3.83 moles of C and 6 moles of O.  I rounded up the C to 4 moles to result in an empirical formula of C4H6

Answer:

Compound: a substance that is made up of more than one type of atom bonded together. Mixture: a combination of two or more elements or compounds which have not reacted to bond together; each part in the mixture retains its own properties.

Explanation:

PLEASE ADD ME AS BRAINLIEST.

Answer: The kinetic energy of solids is limited to vibrational energies..the particles are tightly bound in their crystalline structure and can only bend, flex, and vibrate about relatively fixed position.  When vibrational energies exceed the strength of the force holding the particles together, the crystal structure collapses and we say the material melted.  The particles can now have, in addition to its vibrational energies, rotational energy.  Chunks of the collapsed crystal can, like a ball floating in water, rotate without showing much translational energy. Generally, we associate solids with vibrational kinetic energy, liquids with rotational kinetic energy, and gases with translational kinetic energy. Actually though, liquids have both vibrational and rotational energies, and gases have all three.

There are several types of polyatomic ions, and they are typically listed in order by charge. polyatomic ion is a molecule made up of two or more atoms that are covalently bonded

Polyatomic ions can be classified according to their charge, which can be positive or negative. The most common polyatomic ions with a positive charge are ammonium (NH4+), hydronium (H3O+), and mercury (I) (Hg2 2+). The most common polyatomic ions with a negative charge include hydroxide (OH-), nitrate (NO3-), sulfate (SO4 2-), and phosphate (PO4 3-).

In general, polyatomic ions with a higher charge tend to be less stable than those with a lower charge, and they can also have a greater impact on the chemical properties of the compounds in which they are found. Understanding the types of polyatomic ions and their properties is an important aspect of studying chemistry and related fields.

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\(Fe(OH)3- > Fe2O3- > Fe- > FeCl2- > Fe(OH)2\), represents a set of possible chemical reactions that Fe(OH)3, or iron(III) hydroxide, can undergo.

In the first reaction, Fe(OH)3 is converted into Fe2O3, or iron(III) oxide, through the process of thermal decomposition. This reaction occurs when Fe(OH)3 is subjected to high temperatures, causing it to break down into Fe2O3 and water vapor.

In the second reaction, Fe2O3 is reduced to Fe, or elemental iron, through the process of electrolysis. This reaction involves passing an electric current through a solution of Fe2O3, causing the Fe2O3 to be reduced to Fe at the cathode and oxygen to be produced at the anode.

In the third reaction, Fe is converted into FeCl2, or iron(II) chloride, through the process of chlorination. This reaction involves adding chlorine gas to a solution of Fe, causing the Fe to be converted into FeCl2 and hydrogen gas.

In the fourth reaction, FeCl2 is converted into Fe(OH)2, or iron(II) hydroxide, through the process of acidification. This reaction involves adding an acid to a solution of FeCl2, causing the FeCl2 to be converted into Fe(OH)2 and hydrochloric acid.

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The correct question is:

Explain this chemical reaction \(Fe(OH)3- > Fe2O3- > Fe- > FeCl2- > Fe(OH)2\)

Answer:

it is number 2

Explanation:

hope this helps it is number 11

The new (final) volume of the sample of gas is equal to 0.1922 \(cm^3\).

Given the following data:

To determine the new (final) volume of the sample of gas, we would apply Boyle's law:

Mathematically, Boyle's law is given by the formula;

\(PV = k\\\\P_1V_1 = P_2V_2\)

Where;

Making \(V_2\) the subject of formula, we have:

\(V_2 =\frac{P_1V_1}{P_2}\)

Substituting the given parameters into the formula, we have;

\(V_2 = \frac{47.8 \times 3}{746} \\\\V_2 = \frac{143.4}{746}\)

New volume = 0.1922 \(cm^3\)

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Answer:

a)11.552

b)8.722

c)29.915

d)8

e)5.4082

f)1.782

g)2.864

h)2.822

i)2.42

j)113

The correct number of significant figures are a.5 b.4 c.5 d.1 e.5 f.4 g.4 h.5 i.3 j.3 for all the calculations.

Significant figures or digits are the minimum numbers from zero to nine which are used for the report of results that are uncertain and decimal is not a significant figue and starting zeros too.

the total number of significant figures are,

a) 3.42 + 8.132 =11.732 = 5 significant figures.

b) 4.9 + 3.822 = 8.722 = 4 significant figures.

c) 17.8 + 12.115 = 29.915 = 5 significant figures.

d) 4.55 + 3.45 = 8 = 1 significant figures.

e) 1.966 + 3.4422 = 5.4082 = 5 significant figures.

f) 3.882 – 2.1 = 1.722 = 4 significant figures.

g) 4.894 - 2.03 = 2.866 = 4 significant figures.

h) 15.6600 - 12.838 = 2.8262 = 5 significant figures.

i) 11.22 - 8.8 = 2.42 = 3 significant figures.

j)133-20 = 113 = 3 significant figures

Therefore, The correct number of significant figures are a.5 b.4 c.5 d.1 e.5 f.4 g.4 h.5 i.3 j.3 for all the calculations.

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Answer:

*sodium chloride

*potassium chloride

*calcium chloride dihydrate

*magnesium chloride hexahydrate

*sodium acetate trihydrate

*sodium citrate dihydrate

*sodium hydroxide

Explanation:

Are the components of salt

The compound's empirical formula is CH₃, which stands for one carbon atom and three hydrogen atoms.

A compound is a material that is created chemically by combining two or more separate elements in a specific order. Chemical bonds, which may be ionic or covalent in nature, are what hold the constituent parts of a compound together. Many chemical processes, such as synthesis (combining of elements), decomposition (dissolving a compound into its component elements), and exchange, can result in the formation of compounds (replacement of one element in a compound by another).

Assuming that there are 4 carbon atoms and 12 hydrogen atoms, we can calculate the carbon to hydrogen ratio as follows:

By dividing both sides by 4, the ratio of carbon atoms to hydrogen atoms, which is 4:12, can be reduced to 1:3.

This indicates that the chemical has three hydrogen atoms for every one carbon atom.

As a result, the compound's empirical formula is CH₃, which stands for one carbon atom and three hydrogen atoms.

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Answer:

im rly good with this stuff and i'm working on genetics and phenotypes and stuff.

Explanation:

information that determines your traits basically from your parents

Answer:

384399861 meters

Explanation:

Atoms with very high electronegativity exhibit a strong electron-attracting ability, high ionization energy, small atomic radius, the ability to form strong covalent bonds, a polarizing effect on chemical bonds, and can participate in hydrogen bonding.

Strong electron-attracting ability: Electronegativity is a measure of an atom's ability to attract electrons towards itself in a chemical bond. Atoms with high electronegativity have a strong pull on electrons, meaning they attract and hold electrons tightly.

High ionization energy: Ionization energy is the energy required to remove an electron from an atom or ion. Atoms with high electronegativity tend to have high ionization energies because they tightly hold their valence electrons and require a significant amount of energy to remove them.

Small atomic radius: Electronegativity generally increases as the atomic radius decreases. Atoms with high electronegativity tend to have smaller atomic radii, as the positive charge in the nucleus pulls the electrons closer, resulting in a stronger electron-attracting ability.

Ability to form strong covalent bonds: Atoms with high electronegativity can form strong covalent bonds by sharing electrons with atoms of lower electronegativity. This results in the formation of stable molecules with shared electron pairs.

Polarizing effect on chemical bonds: When atoms with high electronegativity are involved in a bond with atoms of lower electronegativity, they exert a stronger pull on the shared electrons, resulting in a polar bond. This leads to the development of partial positive and partial negative charges within the molecule.

Participation in hydrogen bonding: Atoms with high electronegativity, such as oxygen and nitrogen, can participate in hydrogen bonding. Hydrogen bonding occurs when a hydrogen atom is bonded to an electronegative atom and interacts with another electronegative atom through a weak electrostatic attraction.

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In this case, since the gas is doing work on the surroundings, the sign of work will be negative. The gas is being compressed, which means it is doing work on the surroundings.

Work is defined as the energy transfer due to a force acting through a distance. When the gas is compressed, the piston moves inwards, meaning the force exerted by the gas is in the same direction as the displacement.

According to the convention, work done by a system is considered positive when the force and displacement are in the same direction.

Therefore, in this case, since the gas is doing work on the surroundings, the sign of work will be negative.

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Answer: Plants and animals share many characteristics, but they are different in some respects hope that helps-

Explanation:

The standard reaction enthalpy for the given reaction is +235.8 kJ/mol.

The standard reaction enthalpy (ΔH°) for the given reaction is determined as follows:

Equation of reaction: 3 Fe₂O₃ (s) → 2 Fe₃O₄ (s) + ½ O₂ (g)

The standard enthalpy of formation values for Fe₂O₃ (s), Fe₃O₄(s), and O₂(g) is used to calculate the standard reaction enthalpy.

ΔH° = [2 × ΔH°f(Fe₂O₃)] + [½ × ΔH°f(O₂)] - [3 × ΔH°f(Fe₃O₄)]

where;

ΔH°f(Fe₂O₃) = -824.2 kJ/mol

ΔH°f(Fe₃O₄) = -1118.4 kJ/mol

ΔH°f(O₂) = 0 kJ/mol

ΔH° = [2 × (-1118.4 kJ/mol)] + [½ × 0 kJ/mol] - [3 × (-824.2 kJ/mol)]

ΔH° = -2236.8 kJ/mol + 0 kJ/mol + 2472.6 kJ/mol

ΔH° = 235.8 kJ/mol

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The first reaction is a redox reaction involving a single displacement reaction, while the second reaction is a precipitation reaction.

In the first reaction, Fe (iron) displaces Mg (magnesium) from its compound,\(MgBr2\). This indicates a transfer of electrons from Fe to Mg, resulting in the reduction of Mg and the oxidation of Fe. Therefore, it is a single displacement or substitution reaction with a redox component.

In the second reaction, \(Ca(OH)2 and MgSO4 react to form CaSO4 and Mg(OH)2.\) This reaction does not involve a transfer of electrons between species. Instead, it is a precipitation reaction where two aqueous solutions react to form an insoluble solid (precipitate). In this case, \(CaSO4\)precipitates out of the solution, while\(Mg(OH)2\)remains in the solution.

Redox reactions involve the transfer of electrons, where one species is reduced (gains electrons) and another is oxidized (loses electrons). Precipitation reactions, on the other hand, involve the formation of an insoluble solid product from the reaction of two aqueous solutions.

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When two moles of silver are allowed to react with an unlimited amount of chlorine, 2 moles of silver chloride (AgCl) is produced.

When a chemical reaction takes place, it is important to know the amount of products that will be formed from the reactants used. In order to do this, we need to know the balanced chemical equation for the reaction and the number of moles of reactants used.The balanced chemical equation for the reaction between silver and chlorine gas is given by:

2Ag + Cl2 → 2AgCl

Here, we can see that 2 moles of silver react with 1 mole of chlorine gas to produce 2 moles of silver chloride.Since an unlimited amount of chlorine is allowed to react with 2 moles of silver, the number of moles of silver chloride produced will be equal to the number of moles of silver reacted. Hence, 2 moles of silver chloride will be produced.Therefore, we can say that if 2 moles of silver is allowed to react with an unlimited amount of chlorine, 2 moles of silver chloride will be produced. This is because the balanced chemical equation shows that 2 moles of silver react with 1 mole of chlorine gas to produce 2 moles of silver chloride.

When a chemical reaction takes place, it is important to know the amount of products that will be formed from the reactants used. In this case, we have determined that if 2 moles of silver is allowed to react with an unlimited amount of chlorine, 2 moles of silver chloride will be produced. This is because the balanced chemical equation shows that 2 moles of silver react with 1 mole of chlorine gas to produce 2 moles of silver chloride.

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The charge on the potassium ion is 1+. So, Option A is the correct answer from the given options.

We must ascertain the charge carried by the potassium ion.

Being a group 1 element, potassium will produce an ion with a positive charge.

Since potassium achieves an extremely stable noble gas electrical structure after losing one electron, this element possesses a steady +1 valency.

As a result, the potassium ion has a 1+ charge. The right response from the available alternatives is thus Option A.

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Based on the half-life of the radioactive sample and the properties of nuclear reactions, the correct options are:

Half-life is the time taken for half the amount of atoms in an a radioactive element to decay.

1. After three half-lives, (1/2)³ of the original amount will remain = 1/8

1/8 of 16 = 2 ; option A

2. The balanced nuclear equation is given below:

action below:

/64 → /62 + 4He 2 ; option C

3. The trend of proton-to-neutron ratio as elements become heavier is that heavier elements have a greater amount of neutrons per proton; option C

4. The loss in mass of a compound composed of multiple atom types than those of the individual atoms they are made of is due to energy stored in the bonds in the nucleus known as the binding energy; option D

5. Initially, 12 g of carbon-14 was present

After one half-life, 6 g of carbon-14 remained, and 6 g of carbon-12 was present.

After two half-lives, 3 g of carbon-14 remained, and 9 grams of carbon-12 was present.

Age of the carbon sample = 5730 * 2 = 11460 years; option B

6.  A major argument against nuclear power plants is that they produce radioactive waste materials; option A.

7.  A common source of radiation that humans are exposed to come from outer space in the form of ultraviolet rays; option C.

8. The  balanced nuclear reaction is:

/92+/0 → /36+ 1/0 + 143Ba 56 ; option C

In conclusion, nuclear reaction results in changes in the nucleus of atoms.

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Answer:

liquid

Explanation:

Answer:

True

Explanation:

Answer:

Recycling scrap copper is more sustainable than extracting copper from copper ores due to the following reasons:

Reduces energy consumption: Recycling scrap copper requires less energy compared to mining, extracting, and processing copper ores. This results in a reduction in greenhouse gas emissions and a decrease in energy consumption.

Conservation of natural resources: Recycling scrap copper conserves natural resources because it reduces the need for mining copper ores. Mining copper ores often leads to the destruction of ecosystems, soil erosion, and the emission of harmful pollutants into the environment.

Reduction in landfill waste: Recycling scrap copper helps to reduce the amount of waste in landfills. Copper is a valuable resource, and recycling it ensures that it is reused instead of ending up in landfills.

Cost-effective: Recycling scrap copper is often cheaper than extracting copper from copper ores. This is because recycling eliminates the cost of mining, extracting, and processing copper ores.

Preservation of water resources: Extracting copper from copper ores requires large amounts of water, which can lead to water shortages in some regions. Recycling scrap copper requires less water, thus helping to preserve water resources.

Overall, recycling scrap copper is more sustainable than extracting copper from copper ores because it reduces energy consumption, conserves natural resources, reduces landfill waste, is cost-effective, and helps to preserve water resources.

Explanation:

The color change from red to yellow in fermentation tests occurs due to the production of acid by the bacteria during fermentation.

In these tests, bacteria are inoculated into a test tube containing a sugar (such as glucose, lactose, or sucrose) and a pH indicator (such as phenol red or bromcresol purple) in a nutrient broth medium. The bacteria use the sugar as a source of energy and produce metabolic end-products such as acids, gases, and alcohols. The pH indicator changes color depending on the pH of the medium, allowing the detection of fermentation.

If the bacteria are capable of fermenting the sugar, they will produce acid as an end-product, which lowers the pH of the medium. This acidic environment causes the pH indicator to change from red to yellow. The degree of acid production and the resulting color change depend on the type of sugar, the type of bacteria, and the incubation conditions.

Thus, the color change from red to yellow in fermentation tests indicates a positive result for fermentation, indicating that the bacteria are capable of utilizing the sugar in the medium and producing acid as a metabolic end-product.

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