All of the facts about our star the Sun listed below are true EXCEPT which option?
A. the sun is the smallest object in our Solar System.

B. the sun is an average-sized yellow star.

C. the sun is located in an arm of the spiral shaped Milky Way galaxy.

D. the sun appears brighter because it is much closer to Earth than other stars

Due to the reason that inner d-orbitals do not belong to the outermost shell, these electrons are not included in valence electronic configuration

The electrons in an atom's outermost energy level or shell are known as valence electrons. With six valence electrons, oxygen has two in the 2s subshell and four in the 2p subshell.

Ti is a transition metal with valence electrons in d orbitals since it is an element of the d block.

Normally, only electrons at the highest energy level are considered as valence electrons, however for transition metals, electrons in the d-orbital state following the preceding noble gas configuration are also counted. Fe contains 8 valence electrons, for instance, and its electron configuration is [Ar]3d^64s^2.

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According to MyPlate, half of each meal is supposed to be devoted to: C. Fruits and vegetables.

According to MyPlate, a one-dish meal is supposed to contain the following:

We need at least half of each meal to consist of fruits and vegetables. It is because vegetables and fruits provide a wide variety of vitamins and minerals required to our body. They are also naturally low in calories and the fibers they contain help us feel full.

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Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore,  production of 39 g of C[tex]_2[/tex]H[tex]_2[/tex] requires consumption of 53.6g of H[tex]_2[/tex]O.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

moles of C[tex]_2[/tex]H[tex]_2[/tex]= mass of C[tex]_2[/tex]H[tex]_2[/tex]/molar mass of C[tex]_2[/tex]H[tex]_2[/tex]

                        =39 g /26.04

                        = 1.49moles

for 1 mole of C[tex]_2[/tex]H[tex]_2[/tex], 2 moles of H[tex]_2[/tex]O is required.

for 1.49 moles of C[tex]_2[/tex]H[tex]_2[/tex], 2×1.49=2.98 moles of H[tex]_2[/tex]O is required.

mass of water= moles× Molar mass

                       = 2.98×18

                       =53.6g

Therefore,  production of 39 g of C[tex]_2[/tex]H[tex]_2[/tex] requires consumption of 53.6g of H[tex]_2[/tex]O.

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Answer:

c

Explanation:

got 100%

K2SO4 will show maximum depression in freezing point.

What is freezing point depression?

A solution's freezing point is lower than that of the pure solvent. This signifies that freezing can only occur when a solution is reduced to a lower temperature than the pure solvent.

Depression at the freezing point is a colligative property that depends on the number of particles. K2SO4 offers the most ions out of the options, leading to the greatest depression at the freezing point.

Therefore, K2SO4 will show maximum depression in freezing point.

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The name of this element is gallium

Was the periodic table altered by Mendeleev?

The periodic table was created on February 17, 1869, by Russian chemist Dmitri Mendeleev. He wrote down the symbols for the chemical elements and arranged them according to their atomic weights.

A periodic table of elements is what Mendeleev referred to as. This is due to the fact that he organized the elements according to their atomic masses. He listed the elements in order of increasing atomic mass, with the lighter elements listed first.

During the classification, Mendeleev made predictions about several of the elements' yet-to-be-discovered properties. One of the elements he designated as eka-aluminum later turned out to be gallium.

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When you put 100 grams of sugar to a 100 mL of water there is no increase in volume. The characteristic of matter illustrated by this observation is that the particles of water have spaces between them into which sugar particles fit.

When two or more chemically unrelated compounds are combined, they form a mixture.

In general, homogeneous and heterogeneous mixtures are categorised.

In contrast to heterogeneous mixtures, homogeneous mixtures have a consistent composition throughout.

A homogeneous mixture is exemplified by the mixing of sugar and water.

Sugar dissolves into smaller crystals when it is combined with water, and these smaller sugar particles fill the spaces left by the water molecules to create a homogeneous combination of sugar syrup.

This sugar solution has a consistent chemical make-up.

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Alkanes, Hydrocarbons, and Chemistry amount of isomers overall, including st Question The total number of isomers for 1,2-dimethyl cyclobutane, including stereoisomers, is: A 2 with one trans and one cis (both optically inactive)

Two optically active trans forms, one cis form, and B3 C3, three optically active cis forms: one trans form and two. D

5 isomers are present. 1,2-Dimethylcyclopentane (trans) (trans) 1,2-Dimethylcyclopentane (cis) (cis) 1,3-Dimethylcyclopentane(trans) 1,3-Dimethylcyclopentane(cis) 1,1-Dimethylcyclopentane Response from toppr Upvote(3) How happy are you with the response? This will assist us in getting better. Structure of 1,3-dimethylcyclobutane PubChem CID 448071 Find Molecular Formulas for Similar Structures Synonyms for C6H12 Cyclobutane, 1,3-dimethyl 1,3-dimethylcyclobutane 84.16 molecular weight Add one additional row.

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The structure of (z)-1-chloro-2-methyl-2-butene is in the image attached.

Organic compounds in chemistry are any chemical compounds that have carbon-hydrogen or carbon-carbon bonds. Millions of organic compounds are known due to carbon's propensity to catenate (form chains with other carbon atoms). Organic chemistry is the science that studies the characteristics, reactions, and synthesis of organic molecules.

For historical reasons, a few classes of carbon-containing compounds (e.g., carbonate salts and cyanide salts), as well as a few other outliers (e.g., carbon dioxide, hydrogen cyanide), are not categorised as organic and are classified as inorganic. Other than the aforementioned, there is no agreement among chemists on which carbon-containing molecules are excluded, making any strict definition of an organic compound tricky.

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They create a redox reaction between zinc solid and zinc ions using additive plating. As a result, neutral zinc atoms were produced, which were then deposited onto copper coins.

A technique for coating one metal on top of another called electroplating. Typically, this is carried out for decorative, industrial, or coin-making purposes.

There are two methods for coating a metal:

1. Additive plating

2: Displacement plating

In additive plating, a species in a solution that contributes electrons reduces metal ions. Now, the reduced metal begins to deposit on top of another metal.

When the plating metal is present in the solution during displacement plating, a metal with a lower oxidation number displaces a metal with a higher oxidation number.

The only method used by counterfeiters to create fake coins is additive plating, in which the coinage metal is deposited on top of another base metal.

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The ratio of root mean square velocity of molecules of the ideal gas is 2.

The root mean square is the sum of the squares of the individual velocity values divided by the number of values.

The root mean square is the same as the root mean square velocity.

An ideal gas is considered a monoatomic molecule with molecular mass equal to one.The root mean square velocity([tex]V_{rms}[/tex])  of an ideal gas is calculated by the formula below.

[tex]V_{rms} =[/tex] [tex]\sqrt{\frac{V_{1} ^{2} + V_{2} ^{2} +V_{3} ^{2} +....V_{n} ^{2}}{n} }[/tex]

In terms of temperature, the formula is

[tex]V_{rms} =[/tex][tex]\sqrt{\frac{3RT}{M_{w} } }[/tex]

n= Number of molecules

R= Universal gas constant (8.314 J [tex]K^{-1}[/tex] [tex]mol^{-1}[/tex])

T=Temperature(in Kelvin)

[tex]M_{w}[/tex]= Molecular weight of gas

ratio = [tex]\frac{\sqrt{\frac{3R \ 240}{M_{w} } }}{\sqrt{\frac{3R \ 60}{M_{w} } }}[/tex]

        = [tex]\frac{\sqrt{240} }{\sqrt{60} }[/tex]

        = 2

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Chromatography is useful for identifying unknown substances in a mixture.

Chromatography  is great physical method for observing mixture and solvents. A paper chromatogram can also be used to identify substance by comparing them with known substance. Chromatography is a system for setting apart additives of a combination. To get the system started, the combination is dissolved in a substance referred to as the cellular phase, which incorporates it via a second substance referred to as the desk bound phase.

Thus, it is useful in identifying unknown substances from a mixture.

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Natural acidic salt NH 4 NO 3 is created when a weak base (HNO 3) is used to neutralise a strong acid (HNO 3). (NH 4 OH).

Ammonium Natural acidic  aqueous solution has a pH level that is less than 7, making it somewhat acidic. Why does NH4NO3 behave as an acidic salt? 2 What contributes to the acidity of NH4NO3's aqueous solution? 3 Why is NH4NO3 not a salt that is a base or basic?

In an aqueous solution, NH 4 NO 3 dissolved and divided into NH 4+ and NO 3-. The weak base's conjugate acid, the ammonium ion, can donate a proton to the water molecule and creates H + ions in the solution, which slightly increases the acidity of the aqueous solution of NH 4 NO 3.

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All cations are positive because cations are formed due to loss of electrons. So they are electron deficient.

The formation of a chemical bond between two or more atoms, molecules, or ions results in the formation of a chemical compound. A chemical bond is a long-lasting attraction between atoms or ions that enables the formation of molecules and crystals. Electrostatic contact between oppositely charged ions forms ionic bonds, whereas electron sharing forms covalent bonds.

Chemical bonds link molecules and generate transient connections that allow life to exist. Chemical bonding includes covalent, ionic, and hydrogen bonds, as well as London dispersion forces. Valence electrons are electrons that are the furthest away from the nucleus, have the least attraction from it, and so are the most reactive.

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The value of density in kg/m³ is equal to 0.00088 kg/m³.

The metric system can be demonstrated as a system of measurement that is composed after the decimalized system based on the meter.  Each of the fundamental dimensions can be represented by a single base unit of measurement.

For parameters derived from the base units of the system, units derived from the base units can be used such as the square meter being the derived unit for the area, a parameter derived from length.

Metric units can be defined as units based on the gram, meter, or second and decimal multiples.

Given the density in the unit of g/cm³.

Density = 0.0088 g/cm³

We know that 1 Kg = 1000 g

⇒ 1 g = 10⁻³ Kg

We know that 1 m = 100cm

1 cm = 10⁻² m

Therefore, Density = 0.0088 × 10⁻³Kg/10⁻² m³

Density = 0.00088 kg/m³

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Sugar solution has a 0.03 mol/L concentration.

In chemistry, the term "solubility" describes a material's capacity to dissolve in another substance (the solvent). The solute's inability to create such a solution is known as insolubility.

The amount of a solute in a saturated solution, or a solution in which no more solute can be dissolved, is typically used to gauge how soluble a substance is in a given solvent. The two compounds are said to be in balance for solubility at this time.

Sugar's molar mass equals 342g/L

Number of solute moles = 20/342 = 0.0584 moles

Molecularity = 0.0584

20

1. molarity = 0.03 mol/L

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A chemical is any substance whose composition is known. A chemical always consists of the same "substance," to put it another way. Water is one of the substances found in nature.

Chemical science is the branch of natural science that investigates the composition of substances as well as their properties and reactions. It is defined as the study of matter options include chemistry.

The study of chemistry and biology is combined in a field of research known as chemical biology. To study and influence biological processes, chemists commonly utilize analytical tools, tiny compounds produced by synthetic chemistry, and chemical instrumentation.

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A metal sample weighing 147.90 g and at a temperature of 99.5°C was placed in 49.73 g of water in a calorimeter at 23.0°C. At equilibrium the temperature of the water and metal was 41.8°C. Then:

Two solutions with different temperatures have the final temperature of the mixture which can be found through a calculation. How to calculate the final temperature of the mixture is done by the heat formula (Q) and payments according to the Black Principle. The resulting final temperature of the mixture in the combination of solutions having different temperatures is influenced by several factors. The influencing factors include the mass of the solution (m), the specific heat (C), and the temperature of each solution (T).

In the questions:

a) Δt for water:

Initial water temperature = 23.0°C

Final temperature of water = 41.8°C

Δt water = 41.8 - 23 = 18.8°C

b) Δt for metal:

Initial temperature of metal = 99.5°C

final temperature of metal = 41.8°C

Δt metal = 41.8 - 99.5 = - 57.7°C

c) Heat transferred into the water

Heat flow = (m x c x Δt) water

Heat flows = 49.73 x 41.8 x 18.86

Heat flow = 3908 J

d) Specific heat of metal:

Heat loss by metal = heat gain by water

                   Qmetal = Qwater

  (m x c x Δt)metal = - 3908

147.9 x c x - 57.7°C = - 3908

             -8533.83c = -3908

                             c = -3908/-8533.83

                             c = 0.458 J

e) Approximate molar mass of metal:

Mass metal = 25/0.458

Mass metal = 54.58 g/mol

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Rinse the crystals with approximately 0.5 mL of ice-cold water and remove the rinse with the Pasteur pipette.

Before leaving the laboratory, also record your partner's results in your laboratory notebook. Put your product in an appropriate container Neutralize the filtrate with 1 N your sulfuric acid to destroy any remaining reducing agent.

Put the aqueous filtrate in the appropriate liquid waste container. Dispose of all contaminated Pasteur pipettes melting point and TLC capillaries, and TLC plates in the container for chemically contaminated laboratory debris.

Therefore, Rinse the crystals with approximately 0.5 mL of ice-cold water and remove the rinse with the Pasteur pipette.

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True, The statement that the amount of water vapor in the atmosphere varies depending on the conditions in the area is true.

The amount of water vapor present in the atmosphere is directly related to the temperature, pressure, and humidity of the air in the area. For example, in a hot and humid region, the atmosphere will have a higher amount of water vapor than in a cold and dry region. Additionally, the amount of water vapor in the atmosphere can also be affected by other factors such as wind speed and air movement, which can impact the temperature and humidity of the air in an area.

In addition, the amount of water vapor in the atmosphere can also be affected by human activities. For example, the burning of fossil fuels can increase the amount of water vapor in the atmosphere due to the release of water vapor from the burning process. Similarly, deforestation can reduce the amount of water vapor in the atmosphere as the trees are no longer able to absorb the moisture from the air.

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While performing bag- mask ventilation with oxygen connected with the oxygen flow at 15 L / Min, then it will provide 90 tp 95% of oxygen.

In the Bag-valve-mask ventilation,  Bag valve mask devices are the preferred equipment to deliver positive pressure ventilation to the apneic patient.  Every dental office must have the ability to deliver oxygen with positive pressure. This may be accomplished with either oxygen-powered resuscitators bag valve mask devices. During positive pressure ventilation, there is always a significant risk for gastric distention and subsequent regurgitation or vomiting. This is due to the fact that when oxygen is introduced into the pharynx via positive pressure.

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Propyne with 1 mole HBr describes an unsymmetrical addition reaction.

When a neutral reagent is added to a neutral alkene, the negative side of the reagent attaches itself to a neutral carbon atom that has a smaller number of hydrogen atoms than the positive side of the reagent.

The addition of H-X to a rational alkene such as propene produces a rational alkene. (given in image 2)

Propene and but-1-ene are examples of unsymmetrical alkenes because the groups or atoms attached to either end of the carbon-carbon double bond are unbalanced.

A hydrogen and a methyl group are found at the end of the double bond in propene, but two hydrogen atoms are found at the opposite end of the double bond in hexane. (given in image 4)

Due to the presence of these non-covalent alkenes, it is possible to obtain two different products from some addition processes. When HX molecules are added to propene, you can get one of the following reactions as given in image 3.

It depends on which side of the circuit you add HX across the two connections to determine the answer. In fact, in most cases, it is the second response that occurs. As we have described it, the hydrogen atom is bonded to the carbon atom on the right side. This is my machine.

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Spoilage is the process of food, beverages, or other perishable items becoming unusable due to age, exposure to elements, or other factors.

The 3 types of spoilage are:

1. Physical spoilage: This type of spoilage is caused by physical contamination of the food, such as dirt, dust, hair, insects, etc.

2. Microbial spoilage: This type of spoilage is caused by microorganisms (bacteria, fungi, and yeasts) that attack and decompose the food.

3. Chemical spoilage: This type of spoilage is caused by various chemical reactions in the food, such as oxidation, hydrolysis, and enzymatic reactions.

This can result in food that has gone bad, turned sour, or become inedible.

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Answer:

6IO3- (aq) + 5H2S(aq) => 3I2 (s) + 5SO3 2-(aq) + 3H2O + 4H+

Explanation:

6IO3- (aq) + 5H2S(aq) => 3I2 (s) + 5SO3 2-(aq) + 3H2O + 4H+

I = 6

O = 18

H = 10

S = 5

Among the given compounds all are having chiral centres since the  central carbon is attached to different groups.

A compound become chiral if it contains at least one chiral centre that is., a carbon atom with four different valencies. For example CFClBrI is chiral since the carbon atom is joined with four different groups.

Chiral compounds are optically active and have stereoisomers. The first given compound is chiral , where the second carbon with the OH group is attached with four different groups. One is OH, second is H, and one is CH₃ group and the last one is CH (CH₃)₂.

The second compound is also chiral where the carbon with the OH group has four different valencies. The third one is also chiral with a carbon atom having four different groups. Hence, all of the compounds are chiral.

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Answer:

Mechanical energy is energy that results from movement or the location of an object. Mechanical energy is the sum of kinetic energy and potential energy.

Explanation:

Nuclear energy is energy resulting from changes in the atomic nuclei or from nuclear reactions.

Example: Nuclear fission, nuclear fusion, and nuclear decay are examples of nuclear energy. An atomic detonation or power from a nuclear plant are specific examples of this type of energy.

The average kinetic energy of neon atoms as the temperature is raised from 20°C to 40°C, changes by a factor of 313/293.

On selling the average kinetic energy of a gas. Stating that the temperature of a gas is only related to the motion of the molecules (kinetic energy or speed of the molecules). So that the faster the motion of gas molecules, the higher the temperature of the gas.

The average kinetic energy of gas molecules in the equation for the average kinetic energy of a gas-only applies if the type of gas is a monatomic gas. For diatomic or polyatomic gases, the equation for the average kinetic energy of a gas does not apply.

The formula for the average kinetic energy equation of a gas is as follows:

                                KE = 3/2 RT

With:

KE is kinetic energy

R is the Boltzmann constant with a value of (1.38 x 10-23 JK-1

T is the absolute temperature of the gas in kelvin (K)

This question:

KE = 3/2 RT

[tex]\frac{K_4_0}{K_2_0} = \frac{T_4_0}{T_2_0}\\\\\frac{K_4_0}{K_2_0} =\frac{273 + 40}{273 + 20}\\\\\frac{K_4_0}{K_2_0} =\frac{313}{293}[/tex]

The average kinetic energy of neon atoms changes by a factor of 313/293.

This question is multiple choice:

a) 2

b) [tex]\sqrt{\frac{313}{293}}[/tex]

c) 313/293

d) 1/2

The true choice is C

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(CH3)2ĊCH2CH3, (CH3)2CHCHCH3, (CH3)2CHCH2CH2,(CH3)2C=CHCH2 is the ranking order of the radicals in decreasing stability

In chemistry, a radical, also renowned as a free radical, is a molecule that has at least one unpaired electron. Most molecules have an odd number of electrons, and the covalent bonds form bonds that hold the atoms together within a molecule are usually composed up of pairs of electrons shared by atoms connected by the bond. A chemical substance is said to be "stable" in everyday language and frequently in materials science if it is not need to in the environment or during normal use and maintains its useful properties over the timescale of its expected usefulness.

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The complete question is :

Rank the radicals in order of decreasing stability. Most stable Least stable Answer Bank (CH3)2ĊCH2CH3 (CH3)2C=CHCH2 (CH3)2CHCH2CH2 (CH3)2CHCHCH3

The changes in air temperature and atmospheric pressure will generally be recorded by weather balloon is: (1) a decrease in both air temperature and atmospheric pressure.

The weather balloons are released by the National Weather Service simultaneously. It is made of neoprene or latex and filled with helium or hydrogen. A radiosonde is attached to the balloon to record the air temperature and atmospheric pressure. The data will be sent back to the tracking equipment every 1-2 seconds, such as the decrease in both air temperature and atmospheric pressure.

This question seems incomplete. The complete query is as follows:

“Which changes in air temperature and atmospheric pressure will normally be recorded by a weather balloon when released at Earth’s surface and rises through the troposphere?

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Scope 1 emission are direct emission that involves Greenhouse emission that occur from the sources that are controlled by an organization.

Scope 1 emission generated by gas boilers and owned or leased cars, vans & lorries. These are emissions release into the atmosphere during industrial processes. for example the production of carbon dioxide (CO2) as part of cement manufacturing. Companies of all sizes and in all industries are increasingly recognizing the need to reduce their carbon emissions and address sustainability issues within their operations to become net zero businesses.  Scope 1 is mandatory. This emission is the direct emissions from owned or controlled sources. This emissions associated with fuel combustion in boilers, furnaces, vehicles.

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