is sugar ionic or covalent

[tex]$\mathrm{CaCl}_2$[/tex] exists the only compound which completely dissociates.

A solution is considered to be a strong electrolyte if a significant portion of the dissolved solute is present as ions. Strong electrolytes, ionic compounds and some polar compounds are entirely dissociated into ions and so conduct a current very well.

[tex]$\mathrm{CaCl}_2$[/tex] in aqueous solution dissociates to give one [tex]$\mathrm{Ca}^{2+}$[/tex] and two [tex]$\mathrm{Cl}^{-}$[/tex]ions. An electrolyte is any material that ionizes upon dissociation. Here Calcium Chloride gives one ion of Calcium and two Chloride ions. That is, from [tex]$\mathrm{CaCl}_2$[/tex] a total of three ions exists formed. Therefore it can be classified as a strong electrolyte. The strong electrolytes dissociate completely in the solution.

The complete question is;

Which of the following can be classified as a strong electrolyte?

A [tex]$\mathrm{Br}_2$[/tex]

B [tex]$\quad \mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6$[/tex]

C [tex]$\mathrm{CaCl}_2$[/tex]

D [tex]$\mathrm{H}_2 \mathrm{O}$[/tex]

E [tex]$\quad \mathrm{NO}_3$[/tex]

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A amount of shine best describes visible light. Therefore, option A is correct.

Light, also known as "visible light," refers to the visible region of the electromagnetic spectrum, or the range of wavelengths that cause humans to perceive brightness and color. It falls somewhere between UV and infrared radiation.

People think of the sun, light bulbs, candles, and fire when they think of light, but visible light comes from many sources and in many colors. Other visible light sources include television and computer screens, glow sticks, and fireworks.

Thus, option A is correct.

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Sand is heterogeneous because it is made up of different-sized grains that do not have uniform properties.

Sand is a naturally occurring granular material that is made up of different-sized particles of rocks, minerals, and shells. These particles can vary in size, shape, and composition, resulting in a mixture of grains with different physical and chemical properties. Some grains may be round and smooth, while others may be sharp and angular.

They may also have different colors, densities, and chemical compositions. Due to this variation, sand cannot be considered a pure substance, and its properties will vary depending on the mixture of grains present. Therefore, sand is classified as a heterogeneous mixture.

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The answer best explains how nitrogen deficiency in plants causes chlorosis at the tips of older leaves will be Nitrogen is necessary to synthesize chlorophyll in mature areas of older leaves. Option D is correct.

Chlorosis is the yellowing of leaves, which occurs when plants cannot produce enough chlorophyll. Nitrogen is an essential component of chlorophyll and is required for its synthesis. When plants are deficient in nitrogen, they cannot produce enough chlorophyll in mature areas of older leaves.

Option A is incorrect because while nitrogen is a component of many enzymes, a nitrogen deficiency would not cause new growth to stop since new growth relies on other essential nutrients as well.

Option B is also incorrect since proton pumps are not directly regulated by nitrogen and proton pumps do not specifically supply energy to growing tissue at the tips of older leaves.

Option C is partially correct, as nitrogen is indeed mobile and can be re-located from older leaves to growing parts of the plant. However, this does not explain why nitrogen deficiency causes chlorosis in older leaves.

Hence, D. Nitrogen is necessary to synthesize chlorophyll in mature areas of older leaves is the correct option.

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--The given question is incomplete, the complete question is

"Which answer best explains how nitrogen deficiency in plants causes chlorosis at the tips of older leaves? A) Nitrogen is a component of all enzymes, so new growth will stop if nitrogen is deficient. B) Nitrogen regulates proton pumps that supply energy to growing tissue at the tips of older leaves. C) Nitrogen is a component of chlorophyll, but it is mobile and is re-located from older leaves to growing parts. D) Nitrogen is necessary to synthesize chlorophyll in mature areas of older leaves."--

The lewis structure of the H₂CO₃  is as follows :

             : O :

               ||

H - : O : - C - : O : - H

The H₂CO₃  is the carbonic acid. The total valence electrons in the carbonic acid that is H₂CO₃  is the 24 electrons. the carbonic acid contains the one carbon atom that is doubly bonded to the one oxygen atom and it is singly bonded to the two other oxygen atoms. The lewis structure is also called as the electron dot structure and it is as follows :

            : O :

               ||

H - : O : - C - : O : - H

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Iodine test for starch is " A blue-black color results if starch is present. If starch amylose is not present, then the color will stay orange or yellow.

Put Iodine-KI reagent to a solution or straight onto potatoes or other items like bread, crackers, or flour for the starch test. an an an an a-colored an an an an an an an an a The colour will remain orange or yellow if starch amylose is absent. The colour is not produced by cellulose, starch amylopectin, or disaccharides like sucrose in sugar.

Iodine Test: Iodine may be used as an indicator to track variations in iodide ions and iodine elements while observing changes in several inorganic oxidation reduction reactions. The addition of soluble starch solution. Only the iodine element will provide the distinctive blue-black colour when iodide ions are present. Neither the iodine element nor the iodide ions by themselves will provide the desired hue.

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We are able to determine a molecule's shape using the VSEPR theory.

The VSEPR theory assumes that the molecular shape minimizes these repulsions and that all electron pairs, including bonding pairs and lone pairs, repel one another, particularly when they are close to one another.

The molecule's geometry can be determined with the help of VSEPR theory. As indicated by the VSEPR hypothesis, the electrons repulse each other and will, consequently, take on a game plan that limits this repugnance. When the electron pairs or groups of electron pairs are as far apart as possible, repulsions are at their lowest.

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The temperature is 110.6 °C. The normal "boiling point" of toluene is 110.6 °C.

A pure toluene's boiling point, 110.6° C (i.e. 231.1° F in Fahrenheit) is a colourless, flammable,  insoluble in water, toxic liquid but soluble in all the common organic solvents.

And at higher altitudes, boiling point of the liquid decreases and lowers because the atmospheric pressure is lower and this depends on amount of impurities in liquids, along with the atmospheric pressure.

Toluene is a colorless, flammable liquid and sweet smelling with aromatic odor that derives from petroleum and coal tar. It is stated as aromatic hydrocarbon and the reason is "it has containing benzene ring", that causes the molecule to be extra and more stable than the other hydrocarbons.

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When the molecules of water vapor present in the air come into touch with anything cool, including such the exterior of a cold cup they slow down and even get closer together.

Condensation is indeed the reverse of vaporization in that it changes the state of matter from either the gas phase to the liquid phase. The water cycle is the most commonly used term.

Deposition is a transformation that occurs when a gaseous phase immediately transitions into a solid phase. When the molecules of water vapor present in the air come into touch with anything cool, including such the exterior of a cold cup they slow down and even get closer together.

Therefore, when the molecules of water vapor present in the air come into touch with anything cool, including such the exterior of a cold cup they slow down and even get closer together.

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Your question is incomplete but most probably your full question was,

What causes condensation on a cup of ice water?

The selection of an appropriate solvent is critical for the success of a recrystallization process, as it can significantly affect the yield and purity of the final product. Some of the most important factors to consider when selecting a solvent for recrystallization are:

What is recrystallization?

Recrystallization is a technique used in chemistry to purify solid compounds based on their solubility. The process involves dissolving a crude mixture of the compound to be purified in a suitable solvent, which is then heated to a temperature at which the compound dissolves.

Overall, the ideal solvent for recrystallization should be able to dissolve the compound at high temperatures, but not at low temperatures, be selective towards the desired compound, and be safe, available, and affordable.

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A hybrid orbital is a linear combination of atomic orbitals of the same atom. The orbitals which hybridize to form the bonds in CH₄ are 1s, 2pₓ, 2py, 2pz. The correct option is A.

The process hybridization is the intermixing of various atomic orbitals of slightly different energies in the same atom with redistribution of their energies to yield a new set of orbitals of equivalent energies and shapes.

Here the orbitals of 'C' in excited state are 1s²2s¹2px¹2py¹2pz¹. So the 2s and the three 2p orbitals of 'C' mix among themselves with redistribution of energy to form four new sp³ hybrid orbitals.

Thus the correct option is A.

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The classification of trees is as follows:

1. Conifer leaves are generally thin and needle-like, while seeds are contained in cones. Conifers include pine and cedar.

2. Evergreens are plants that maintain their leaves in all seasons and include trees such as pine, cedar, and mango.

3. Hardwoods reproduce using flowers and have broad leaves; hardwoods include trees such as maple, elm, and mango.

4. Deciduous trees lose their leaves seasonally and include trees such as maple and elm.

Deciduous and coniferous trees are the two main types of trees. Since the leaves of deciduous trees tend to be wider and larger than those of conifers, they are sometimes known as broadleaf trees.

There are trees in each of the three main classes of vascular plants: angiosperms, gymnosperms, and pteridophytes (seedless vascular plants like tree ferns) (flowering plants).

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The group of measurements that is the most precise is option b) 2 g, 2.5 g, 3 g.

This is because precision refers to how closely a group of measurements are to each other.

In this case, the measurements in option b are the closest together, with only a difference of 0.5 g between each measurement.

Therefore, this group of measurements is the most precise.

It is important to note that precision does not necessarily mean accuracy, as the measurements could all be close together but still be far from the true value.

However, in this case, we are only looking at precision, so option B is the correct answer.

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The ionization constant, also known as the acid dissociation constant or Ka, is a measure of the strength of an acid in a solution.

Ionization constant is the equilibrium constant for the ionization reaction of an acid, and is defined as the product of the concentrations of the ions produced when the acid dissociates, divided by the concentration of the undissociated acid.

In mathematical terms, the ionization constant is represented as: Ka = [H+][A-]/[HA]

Where [H+] is the concentration of hydrogen ions, [A-] is the concentration of the conjugate base, and [HA] is the concentration of the undissociated acid.

The higher the ionization constant, the stronger the acid is, and the more it will dissociate in a solution. Conversely, a lower ionization constant indicates a weaker acid that will not dissociate as much.

It is important to note that the ionization constant is different from the ionization energy, which is the amount of energy required to remove an electron from an atom or molecule.

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Multiplying each subscript in the empirical formula by the scaling factor gives us the molecular formula: C₁₆H₁₄O₄S becomes C₁₅.8H₁₃.9O₃.9S.

A drug is a substance that alters the way a living organism functions. Drugs can be used for medicinal, recreational, or experimental purposes. Medicinal drugs are used to prevent, cure, or treat diseases, disorders, and injuries. Recreational drugs are used for pleasure or to alter one's mental state. Experimental drugs are used in clinical trials or research studies to investigate their effects on the human body.

Here,

To determine the molecular formula of the compound, we can use the percent composition of each element and the molar mass.

First, we can find the mass of each element present in the 100 g sample:

Mass of C: 64.94 g

Mass of H: 4.50 g

Mass of O: 20.36 g

Mass of S: 10.20 g

Next, we can convert each mass to moles using the molar mass:

Moles of C: 64.94 g / 12.01 g/mol = 5.41 mol

Moles of H: 4.50 g / 1.01 g/mol = 4.46 mol

Moles of O: 20.36 g / 16.00 g/mol = 1.27 mol

Moles of S: 10.20 g / 32.06 g/mol = 0.32 mol

We can then divide each mole value by the smallest mole value to get a set of whole-number ratios:

C: 5.41 mol / 0.32 mol = 16.91

H: 4.46 mol / 0.32 mol = 13.94

O: 1.27 mol / 0.32 mol = 3.97

S: 0.32 mol / 0.32 mol = 1

Multiplying each ratio by the smallest whole number that makes all the ratios integers gives us the empirical formula:

C₁₆H₁₄O₄S

To find the molecular formula, we need to know the molar mass of the compound. The molar mass given in the problem is 314.38 g/mol. Dividing the molar mass by the empirical formula mass gives us the scaling factor:

Scaling factor = 314.38 g/mol / 318.34 g/mol = 0.987

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The energy band in the Electromagnetic Spectrum that gets completely absorbed by Earth's atmosphere is the X-ray band.

The Electromagnetic Spectrum is the range of all types of electromagnetic radiation. Electromagnetic radiation includes all forms of energy that travel through space as a wave, characterized by their wavelength and frequency. This spectrum includes a wide range of radiation, from long-wavelength radio waves to short-wavelength gamma rays. The Electromagnetic Spectrum is typically divided into different regions, each with its own range of wavelengths and frequencies. These regions include radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. Each of these regions has different properties and is used for different applications. For example, radio waves are used for communication, while X-rays are used for medical imaging and materials science. The Electromagnetic Spectrum is an important concept in physics and astronomy, as it helps us understand the properties of electromagnetic radiation and how it interacts with matter. The different regions of the spectrum also allow scientists to study different phenomena, from the study of stars and galaxies in the radio and infrared regions to the study of the atomic and subatomic world with X-rays and gamma rays.

Here,

X-rays have high energy and short wavelengths, which makes them useful for studying the properties of matter at the atomic and subatomic level. However, X-rays are absorbed by Earth's atmosphere and cannot penetrate to the surface, which means that a space telescope is needed to study this band of the Electromagnetic spectrum. The Chandra X-ray Observatory, for example, is a space telescope that was specifically designed to study X-rays from space.

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Van't Hoff general equation is given as −ΔG° = RT logKp.

Generally, the Van't Hoff factor can be basically defined as the ratio of the concentration of particles formed when a substance is dissolved to the concentration of the substance by mass. Van't Hoff factor is described as the extent to which a substance associates or dissociates in a solution.

The Van't Hoff equation generally gives the relationship between the standard gibbs free energy change and the equilibrium constant. Van't Hoff factor is represented by the equation −ΔG° = RT logKp.

Van't Hoff equation can also be written as `piV=nRT` where n is the no. of moles of solute present in V litres of solution, `pi` is the osmotic pressure, T is temperature and R is gas constant or solution constant.

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To draw a structure of SF₆ we need to make an Octahedral structure.

To draw the structure of SF₆, you need to follow these steps:

1. Start by drawing the central atom, S, in the middle of the structure.

2. Draw six F atoms around the S atom, each connected to the S atom with a single bond.

3. Since S has six valence electrons and each F atom has seven valence electrons, the total number of valence electrons in the structure is 48 (6 + 6*7).

4. Use the remaining valence electrons to complete the octets of each F atom by adding three lone pairs of electrons to each F atom.

This is the correct structure of SF₆, with the S atom in the center and six F atoms bonded to it with single bonds. Each F atom also has three lone pairs of electrons to complete its octet.

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Atomic radius decreases from left to right in a period because of the increasing positive charge in the nucleus. As the atomic number increases from left to right, the number of protons in the nucleus also increases. This results in a greater positive charge in the nucleus, which pulls the electrons closer to the nucleus and decreases the atomic radius.

Additionally, the number of energy levels remains the same across a period, so there is no additional shielding effect to counteract the increasing nuclear charge. Therefore, the atomic radius decreases from left to right in a period.


1. The atomic number increases from left to right in a period.
2. The number of protons in the nucleus increases with the atomic number.
3. The greater number of protons creates a greater positive charge in the nucleus.
4. The greater positive charge pulls the electrons closer to the nucleus.
5. The number of energy levels remains the same across a period, so there is no additional shielding effect.
6. The atomic radius decreases from left to right in a period.

The atomic radius decreases from left to right in a period because of the increasing positive charge in the nucleus and the lack of additional shielding effect.

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The decaying leaves undergoing a chemical reaction to neutralize the pollutants. Therefore, the correct option is option A.

The introduction of dangerous substances is chemical pollution. Herbicides, herbicides, fertilizers, detergents, petroleum, industrial chemicals, as well as sewage are typical man-made contaminants that end up in the ocean. Further inland from coasts, a lot of ocean toxins are dumped into the ecosystem.

The movement of chemical pollutant in soil can be slowed by the presence of organic material, such as decayed leaves. The decaying leaves undergoing a chemical reaction to neutralize the pollutants.

Therefore, the correct option is option A.

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The pressure of the vaporized liquid, or vapor pressure, can be determined by a variety of experimental and theoretical methods,Here are a few examples:

1) Experimental determination: The vapor pressure can be measured experimentally using a variety of techniques, such as the isothermal-isobaric (vapor pressure) or isothermal-isochoric (vapor-liquid equilibrium) methods. In these methods, the liquid is heated in a closed container at a constant temperature, and the pressure of the vapor above the liquid is measured. The pressure is gradually increased until the vapor pressure equals the applied pressure. The pressure at this point is the vapor pressure of the liquid.

2) Antoine equation: The Antoine equation is a mathematical model that relates the vapor pressure of a substance to its temperature. This equation is based on empirical data and takes the form: log10(P) = A - (B / (T + C)), where P is the vapor pressure, T is the temperature in Kelvin, and A, B, and C are empirical constants. By fitting the Antoine equation to experimental vapor pressure data, the vapor pressure of a substance at any temperature can be predicted.

3) Clausius-Clapeyron equation: The Clausius-Clapeyron equation is a theoretical relationship that describes the dependence of the vapor pressure of a substance on its enthalpy of vaporization and temperature. This equation takes the form: ln(P2/P1) = (ΔHvap/R)((1/T1) - (1/T2)), where P1 and P2 are the vapor pressures at temperatures T1 and T2, ΔHvap is the enthalpy of vaporization, R is the gas constant, and T1 and T2 are the temperatures in Kelvin. This equation can be used to predict the vapor pressure of a substance at any temperature, given its enthalpy of vaporization.

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Homeostasis is the maintenance of a stable internal environment inside a cell and therefore inside a living organism. We can say it is an internal environment.

We know cell maintains cell temperature, fluid balance, sugar balance etc. this is actually maintaining the steady state between internal conditions and outer environment.

As mentioned above internal environment can include temperature, pH, and concentration of various ions and nutrient etc.

The body actually maintains these variables through various feedback mechanisms. This is to ensure optimal and good functioning of cells. Not only cells but tissues, and organs also.

Homeostasis is a very crucial thing for the survival of a living organisms. Even the slightest deviations from the optimal ranges can have significant negative consequences. The consequences can be cellular and physiological functions.

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Apparent weight = 639 N + (65.14 kg x 2.9 m/s²) = 835 N [2].When the elevator has an upward acceleration of magnitude 2.90 m/s², the reading on the scale will be different from the person's normal weight due to the apparent weight caused by the elevator's acceleration .

The apparent weight is the force experienced by the person inside the elevator, and it is related to the actual weight and the acceleration of the elevator.To calculate the apparent weight of a person in an elevator, we can use the formula:

apparent weight = actual weight + (mass of the person x acceleration of the elevator)

where the mass of the person is equal to the actual weight divided by the acceleration due to gravity, which is 9.81 m/s².

For example, if a person's normal weight is 639 N (about 65.14 kg) and the elevator has an upward acceleration of 2.9 m/s², the apparent weight will be:

apparent weight = 639 N + (65.14 kg x 2.9 m/s²) = 835 N [2]

Similarly, if a person's normal weight is 655 N and the elevator has an upward acceleration of 2.9 m/s², the scale reading will be different from their normal weight, and the apparent weight can be calculated using the above formula

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According to law of conservation of mass, 2.0 g calcium reacts with 1.9 g fluorine  to form 3.9 g of calcium fluoride .

According to law of conservation of mass, it is evident that mass is neither created nor destroyed rather it is restored at the end of a chemical reaction .

Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.

Mass of reactants=mass of products which is 2+1.9=3.9 g which is equal to mass of product hence law of conservation of mass,is obeyed.

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Exceptions to the octet rule - Molecules, such as NO, with an odd number of electrons;

Molecules in which one or more atoms possess more than eight electrons, such as [tex]SF_{6}[/tex]; and

Molecules such as [tex]BF_{3}[/tex], in which one or more atoms possess less than eight electrons.

Common exceptions to the octet rule are molecules with an odd number of electrons and molecules in which one or more atoms contain more or less than eight electrons. Molecules with an odd number of electrons are relatively rare in the s- and p-blocks, but very common among the d- and f-block elements.

Compounds with more than an octet of electrons around an atom are called extended valence molecules. One model to explain their existence uses one or more d orbitals in the bond in addition to the valence ns and np orbitals. Such species are known only for atoms of period 3 or lower that contain an nth subshell in their valence shell. The learning objective is to determine the Lewis dot symbol for elements whose compounds do not have an octet of electrons.

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During 1700s, Lavoisier demonstrated through trial and error method that the total mass of reactant and mass of product remains same during the experiment.

In the last part of the 1700s, Lavoisier demonstrated through trial and error that the total mass doesn't change in a chemical reaction, driving him to proclaim that matter is constantly preserved in a compound response.Lavoisier's experiment denoted whenever somebody first obviously tried this thought of the conservation of issue by estimating the majority of materials both when they went through a compound response.

At last, the disclosure of the law of conservation of mass was enormously influential for the field of science since it demonstrated that matter wasn't just vanishing (as it had all the earmarks of being) yet was somewhat changing structure into one more substance of equivalent mass.

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The treatment for magnesium poisoning involves slowly injecting 10mL of calcium gluconate (2.2mmol of calcium in a 10mL vial; formerly known as 10% solution) into the vein over the course of 10 minutes.

What are the symptoms and treatment for magnesium sulfate toxicity?

Early symptoms of magnesium toxicity include nausea, feeling heated, flushing, somnolence, double vision, slurred speech, and weakness. The first sign of magnesium toxicity is typically the loss of patellar reflexes, which happens with serum magnesium levels of 9 mg/dl to 12 mg/dl.

What symptoms indicate toxicity from magnesium sulfate?

Keep an eye out for the warning signs and symptoms of magnesium sulfate toxicity, such as hypotension, areflexia (loss of DTRs), respiratory depression and arrest, oliguria, shortness of breath, chest pains, slurred speech, hypothermia, confusion, and circulatory collapse.

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The molar mass of the Zn in the grams/ mole is the 65 g / mol.

The Zinc is the chemical element with the symbol of the Zn and the atomic number of the zinc 30. The Zinc is the slightly brittle metal at the room temperature and it has the shiny greyish appearance when it oxidation is removed. The zinc is the first element in the group 12 in the periodic table.

The noble electronic configuration of the zinc is as :

Electron configuration: [Ar] 3d¹⁰4s²

The zinc is the plays the role in the creation of the DNA, growth of the cells, the building proteins, the healing damaged tissue, and it will be supporting the healthy immune system. The molar mass of the zinc is 65 g/mol.

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The Lewis structure is shown in the image attached. Note that NH2+does not exist but NH2-

Lewis structure, also known as Lewis dot structure, is a representation of the valence electrons of an atom in a molecule. It shows the arrangement of atoms and their bonds in a molecule. In Lewis structures, electrons are represented as dots surrounding the atomic symbol and covalent bonds are represented as lines connecting the atomic symbols.

The goal of drawing a Lewis structure is to show the distribution of electrons around the atoms in a molecule in a way that satisfies the octet rule, which states that atoms tend to bond in such a way that they each have eight electrons in their valence shell.

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