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Chlorine's 3p sublevel has 5 electrons in it. It needs _____ electron(s) more in the 3p sublevel to make it stable.
a). 5
b).4
c).3
d).2
e).1

Explanation:

19/9 F -1 (19 is stacked over 9 next to F) #protons: 9, #neutrons: 10, #electrons: 10

55/26 Fe +3, atomic #: 26, mass #: 55, #protons: 26, #neutrons: 29, #electrons: 23

Answer:

it's called electrons, negatively charged particles

The kind of compounds that we have in the question are;

\(CH_{4}\) - Covalent

\(PBr_{2}\) - Polar covalent

\(F_{2}\) - Covalent

\(H_{2} O\)- Polar covalent

\(C_{3} H_{8}\) - covalent

\(Se_{2}\) - Covalent

NaCl - ionic

\(AlF_{3}\) - Ionic

MgO - ionic

\(Al_{2} O_{3}\) - ionic

Gilbert N. Lewis first suggested this kind of structure in 1916, and it is now frequently used in chemistry to show how bonds and molecule structure interact.

Atoms are represented by symbols, while the bonds between them are shown by lines. Each atom's valence electrons are shown as dots or dashes.

The covalent compounds above may or may not have a dipole moment while an ionic bond holds compounds such as NaCl. For the covalent compounds, electrons are shared as in water molecule.

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Answer:

A- In (NH4)3PO4  there are four ions in total as three ions of NH₄ and is one ion of PO₄

Answer:

Here’s an example:

CH (methylene) is the empirical formula.

C2H2 is a molecular formula. It is a gas called Ethyne.

C8H8 is an oily liquid called Styrene. It is also a molecular formula.

Now compare: even though the empirical formula for these compounds is the same, they have different molecular formulas and different properties.

Explanation:

Some background information:

The empirical formula is the formula with the lowest whole number ratio of an element in a compound. A molecular formula is the chemical formula of a (molecular) compound. The molecular formula gives us the exact number of atoms or moles in that compound.

I have attached pictures for a better understanding of the empirical formula.

Answer:

When you walk your dog, you are using energy from the sunlight to power the activity. Explain. The energy you use is transferred from glucose, which got it directly from sunlight.

Explanation:

The expected major product of the given reaction sequence is t-BuBr.

In the first step of the reaction sequence, t-BuOK (tert-butoxide potassium) and t-BuOH (tert-butanol) are involved. This combination typically results in the elimination of a proton (H⁺) from t-BuOH, generating the t-butoxide ion (t-BuO⁻). The t-BuO⁻ ion then acts as a strong base and abstracts a proton from t-BuBr, leading to the formation of t-BuBr as the major product.

Therefore, the expected major product of the reaction sequence is t-BuBr.

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Answer:

Organisms can be classified into one of three domains based on differences in the sequences of nucleotides in the cell's ribosomal RNAs (rRNA), the cell's membrane lipid structure, and its sensitivity to antibiotics. 3. The three domains are the Archaea, the Bacteria, and the Eukarya.

Explanation:

The fact that there are more possible combinations for amino acids than the number of amino acids themselves implies that each amino acid can be encoded by multiple codons.

A codon is a sequence of three nucleotides in DNA or RNA that corresponds to a specific amino acid.

There are 20 standard amino acids used to build proteins in living organisms. However, there are 64 possible three-letter combinations of nucleotides (4³) that can be used to form codons. This means that on average, there are more than three codons that can encode each amino acid.

To calculate the number of codons per amino acid on average, we divide the total number of codons (64) by the number of amino acids (20). Therefore, the average number of codons per amino acid is 64/20 = 3.2.

This indicates that there is a degeneracy or redundancy in the genetic code, where multiple codons can specify the same amino acid.

For example, the amino acid leucine is encoded by six different codons (UUA, UUG, CUU, CUC, CUA, CUG), while methionine and tryptophan are each encoded by a single codon.

In conclusion, the existence of more possible combinations for amino acids than amino acids themselves means that the genetic code is degenerate, allowing for redundancy and flexibility in protein synthesis.

This redundancy helps to protect against errors in DNA replication and transcription and allows for evolution to occur through the accumulation of genetic variations.

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Answer:

Answer:

Most ceramics resist the flow of electric current, and for this reason ceramic materials such as porcelain have traditionally been made into electric insulators.

Explanation:

Gravity is a (n) force between objects and depends on an object's size and their distance apart.

Gravitational force is the attractive that exist between all object with mass an object with mass attracts another object with mass the magnitude of the force is directly proportional to the masses of the two objects and inversely proportional to the square of the distance between the two objects

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By subjecting the two compounds to Jones reagent, you can observe the difference in their reactivity and determine the compound that undergoes oxidation (4-methyl-3-penten-1-ol) and the one that does not (1-methoxy-3-methyl-2-butene).

To distinguish between 1-methoxy-3-methyl-2-butene and 4-methyl-3-penten-1-ol, you can use an oxidizing agent that can react selectively with the alcohol group present in 4-methyl-3-penten-1-ol.

One suitable reagent for this purpose is Jones reagent (a mixture of chromic acid and sulfuric acid). Jones reagent is a strong oxidizing agent that can convert alcohols to their corresponding carbonyl compounds (aldehydes or ketones).

Here's what would happen with each compound:

Methoxy-3-methyl-2-butene does not have an alcohol group, so it would not react with Jones reagent.

4-Methyl-3-penten-1-ol has an alcohol group, and it can be oxidized by Jones reagent to form the corresponding aldehyde or ketone. The specific product obtained would depend on the reaction conditions.

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In the redox reaction occurring in a nickel-cadmium (nicad) battery, cadmium (Cd) is oxidized, while nickel(II) oxide \((NiO_2)\) is reduced. The oxidizing agent is \(NiO_2\), and the reducing agent is Cd.

In the given redox reaction:

\(\[Cd(s) + NiO_2(s) + 2H_2O(l) \rightarrow Cd(OH)_2(s) + Ni(OH)_2(s)\]\)

The substance being oxidized is cadmium (Cd), which starts in its elemental state (Cd(s)) and is converted to cadmium hydroxide \((Cd(OH)_2(s))\). In this process, the oxidation state of Cd increases from 0 to +2, indicating the loss of electrons.

The substance being reduced is nickel(II) oxide ( \(NiO_2\)), which starts in its oxidized form and is reduced to nickel(II) hydroxide (\(Ni(OH)_2\)). The oxidation state of Ni decreases from +4 to +2, indicating the gain of electrons.

Based on these observations, we can identify the oxidizing agent and reducing agent. The oxidizing agent is the substance that gets reduced, while the reducing agent is the substance that gets oxidized. In this case,  \(NiO_2\)is the oxidizing agent as it causes the reduction of Cd, and Cd is the reducing agent as it undergoes oxidation to facilitate the reduction of  \(NiO_2\).

Therefore, in the given redox reaction, cadmium is oxidized and nickel(II) oxide is reduced, with  \(NiO_2\) acting as the oxidizing agent and Cd serving as the reducing agent.

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Answer:

Because: The mixtures contain unwanted substances which may be harmful and may degrade the properties of mixtures. So we, need to separated them and extract useful substances.

Answer:

The composition of the mixture is very important, as a result of nature exists solely by its properties, and also the reactions may be separated.

The nurse teaches a client about the dangers of using sodium bicarbonate regularly. The effect of sodium bicarbonate is the nurse trying to prevent will be Sodium bicarbonate use over an extended period of time may result in sodium and water retention together with systemic alkalosis.

Feeling thirsty, experiencing stomach cramps, and experiencing gas are typical sodium bicarbonate side effects. You could be more vulnerable to adverse reactions that are more severe if you have certain medical conditions, such as high blood pressure, heart failure, and especially kidney disease.

An antacid was using to treat acid indigestion and heartburn is also sodium bicarbonate. In some circumstances, your doctor may also advise you to take sodium bicarbonate to reduce the acidity of your blood or urine. Ask your doctor as well as a pharmacist for more details if you're interested in using this drug for any other conditions.

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Answer:

100x less acidic

Explanation:

pOH is the inverse of pH, which is a measure of the acidity or basicity of a solution. The lower the pH of a solution, the more acidic it is, and the higher the pOH, the less acidic it is.

To determine how many times more acidic a solution with a pOH of 12 is compared to a solution with a pOH of 10, we can use the formula:

pH1 / pH2 = 10^(pOH1 - pOH2)

In this case, we are given that the pOH of the first solution is 12 and the pOH of the second solution is 10. We can plug these values into the formula to calculate the ratio of acidity:

pH1 / pH2 = 10^(12 - 10)

= 10^2

= 100

Therefore, a solution with a pOH of 12 is 100 times less acidic than a solution with a pOH of 10.

Answer:

The answer should be 1000 kg / m3

Answer:

No

Explanation:

This is because light cannot not whiten Jayden's teeth but light can change materials by hearing it up. There are some substances or tooth paste that can be use to whiten the teeth because of the content they are made off which whitens the teeth. Some of it include baking soda, hydrogen peroxide toothpaste, tumeric toothpaste, toothpaste that contain fluoride.

Glucose transport out of intestinal cells into the bloodstream requires a. a Na+ concentration gradient between the blood and the intestinal cell, b. a Na+-glucose cotransporter in the membrane facing the blood, and d. a higher concentration of glucose in the intestinal cells,

These factors are required for the process of secondary active transport, in which the Na+ concentration gradient provides the energy for the movement of glucose against its concentration gradient into the bloodstream. The Na+-glucose cotransporter is a type of symporter that moves both Na+ and glucose in the same direction across the membrane. The higher concentration of glucose in the intestinal cells is necessary for the transport of glucose into the bloodstream, where the concentration of glucose is lower.

The options c. a glucose channel protein on the cell surface facing the blood and e. a Na+ channel connecting the intestinal cell to the blood stream are not required for glucose transport out of intestinal cells into the bloodstream.

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The coefficient of Fe3+ when the following equation is balanced in basic solution is B. 2.

CN- + Fe3+ ? CNO- + Fe2+

In basic medium, add one OH- ion to both sides for balancing the H+ ions. And the reaction becomes,CN- + Fe3+ + OH- → CNO- + Fe2+ + H2OUse the inspection method to balance the reaction.CN- + Fe3+ + OH- → CNO- + Fe2+ + H2O1 1 1 1 1 1+1   1 2   1The coefficients of Fe3+ and Fe2+ are 1 and 1, respectively, which implies that the transfer of one electron takes place from Fe3+ to CN-.

Therefore, the coefficient of Fe3+ is 1 when the given equation is balanced in the basic medium. However, we can't consider the coefficient of Fe3+ as 1 because this equation cannot be balanced without changing the coefficients of Fe3+ and Fe2+.Thus, we modify the equation by making the coefficients of Fe3+ and Fe2+ 2 and 3, respectively.CN- + 2Fe3+ + 3OH- → CNO- + 2Fe2+ + H2O

Therefore, the correct answer is B. 2.

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The number of cycles of β-oxidation required for the complete oxidation of activated oleic acid, 18:1(Δ9) is 8. The structure of the partially oxidized fatty acyl group formed when this oleic acid has undergone three cycles of β-oxidation is: acetyl-CoA.

Let's understand this in detail:

What is β-oxidation?

Beta oxidation is a metabolic pathway in which fatty acids are broken into acetyl-CoA. It is also known as the mitochondrial fatty acid oxidation or beta-degradation cycle.

β-oxidation is a multi-step process in the mitochondrial matrix and includes four major reactions: oxidation, hydration, oxidation, and thiolysis.

The steps involved in the β-oxidation of activated oleic acid (18:1(Δ9)) are as follows:

The initial step in β-oxidation is the oxidation of the activated fatty acid to create an unsaturated bond between the α and β carbons.

In the second step, water is added to the carbonyl group of the activated fatty acid, generating a hydroxyl group.

In the third step, the hydroxyl group in the β-carbon undergoes oxidation, producing a keto group. The keto group is broken down into two-carbon acetyl-CoA by the action of thiolase.

Thus, the number of cycles of β-oxidation required for the complete oxidation of activated oleic acid, 18:1(Δ9), is 8. When this oleic acid has undergone three cycles of β-oxidation, the partially oxidized fatty acyl group formed is acetyl-CoA.

The next two steps in the continued oxidation of this intermediate are: Acetyl-CoA moves into the citric acid cycle where it is oxidized to CO2, ATP, and reducing equivalents (NADH, FADH2). These reducing equivalents are subsequently utilized to produce ATP in oxidative phosphorylation.

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Explanation:

Malleability refers to the flexibility of something , e.g bending

Ductility refers to how long copper wire can be stretched

Answer:

• Reacting aqueous Sodium hydroxide solution with Magnesium chloride.

Explanation:

\({ \rm{2NaOH _{(aq)} + MgCl _{2(s)} \: \dashrightarrow \: 2NaCl _{(s)} + Mg(OH)_{2(aq)} }}\)

Answer:

Sodium hydroxide solution + Magnesium chloride = sodium chloride crystals

Explanation:

Answer:  A

Explanation:

Answer:

C

Explanation:

During the decay process, radioactive atoms release energy and become more stable. In the case of cesium-137, it was found that over a period of 365 days, the number of radioactive atoms decreased from 1,000,000 to 977,287. This decrease in the number of atoms is due to the decay of the radioactive substance.

Radioactive decay occurs randomly and is governed by the half-life of the radioactive material. The half-life is the time it takes for half of the radioactive atoms in a sample to decay. In this case, the specific half-life of cesium-137 was not provided, so we cannot determine the exact time it took for the decay to occur. However, we do know that after 365 days, the number of radioactive atoms reduced to 977,287.

Overall, the reduction in the number of radioactive atoms over time is a result of the release of excess energy, which makes the atoms more stable.

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