11. The greenhouse effect is what allows structures like greenhouses to be much warmer than they otherwise would be by capturing sunlight, and not allowing it to
escape. A similar effect is happening to our planet because carbon dioxide is trapping the sun's heat close to the earth. Carbon dioxide is a byproduct of burning
fossil fuels. If we burn less fossil fuels in the future, what will be the most likely effect on carbon dioxide levels?
O A. Stay the same
OB. Increase
O C. Will fluctuate between increasing and decreasing
OD. Decrease

Therefore, +17 + (-10) = +7 is the effective nuclear charge. Simply counting the number of electrons in the outer shell—without applying any charges—will get the same result. That would be the 3s2 3p5 for Cl, where 2 + 5 = 7.

Use the formula Zeff = Z - S, where Z is the atomic number and S is the number of shielding electrons, to calculate the effective nuclear charge of an atom. By deducting the number of valence electrons from the total number of electrons in the atom or ion, one can calculate the number of shielding electrons. Effective nuclear charge (Zeff) is an atom's net positive charge that attracts an electron. The closest estimate of this net charge is. Effective nuclear charge (Zeff) is calculated as Z minus Zcore.

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First ionization reaction: -

H₂SeO₄(aq) + H₂O(l)  →  H₃O⁺(aq) + HSeO₄⁻(aq)

Second ionization reaction: -

HSeO₄⁻(aq) + H₂O(l)  →  H₃O⁺(aq) + SeO₄⁻²(aq)

Selenic acid is a diprotic and a strong acid with the formula: H₂SeO₄.

When it reacts to water, it releases two protons in two ionizations.

Finally, it gives hydronium to the medium.

H₂SeO₄(aq) + H₂O(l) → H₃O⁺(aq) + HSeO₄⁻(aq)

HSeO₄⁻(aq) + H₂O(l) → H₃O⁺(aq) + SeO₄⁻²(aq)

        According to the given condition the selenous  acid is a diprotic acid (two hydrogen ions) we can identify two ionization reactions, the first one, showing up the dissociation of the first hydrogen to yield hydrogen selenic ions and the second one, showing up the dissociation of the hydrogen sulfate ions to hydrogen ions and selenic ions.

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Answer:

answer below

Explanation:

The atomic structure primarily affects the chemical, physical, thermal, electrical, magnetic, and optical properties. The properties of a material offer clues as to the structure of the material. The strength of metals suggests that these atoms are held together by strong bonds.

The reaction of benzaldehyde with acetone and sodium hydroxide produces  this is an example of mixed aldol condensation reaction.

The reaction of benzaldehyde with acetone and sodium hydroxide produces dibenzalacetone.   . this is an example of mixed aldol condensation. in mixed aldol condensation molecule of an aldehyde react ketone to form dibenzalacetone.   the more reactive is the aldehyde as compared to that of ketone. thats why rapidly reacts with anion of ketone. the formula of dibenzalacetone  C₁₇H₁₄O.  The two benzaldehyde molecules react with acetone and form dibenzalacetone.

Thus, The reaction of benzaldehyde with acetone and sodium hydroxide produces  this is an example of mixed aldol condensation reaction.

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C9H8O4 + NaOH = C9H7O4Na + H2O, which is the same reaction, is a balanced chemical equation that describes an acid-base reaction that enables you to calculate the moles of aspirin contained in a sample.

Acetylsalicylic acid is simply known by its common name, aspirin. It is a benzoic acid that has had an acylated alcohol (really a phenol) function substituted in the ortho position. As a result, there are two possible reactions that might happen when aspirin and NaOH are combined: the quicker reaction is the deprotonation of the acid function, which results in sodium acetylsalicylate. In fact, several aspirin formulations contain this ingredient.

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Each of the following number of moles of ethanol is present in a 13.2 mL volume of 0. 220 m ethanol solution.

Why do we do it?

The notion is that the number of moles of solute contained in 1L=10^3mL of solution may be calculated from the molarity of the solution. In our situation, a solution of ethanol with a concentration of 0.220 M will have 0.220 moles of ethanol per 10^3 mL of solution. This suggests that 2.90 10 3 moles of ethanol will be present in the mixture of 2.90 ×10^3 moles of ethanol in a 10^3 mL solution and 0.22 moles of ethanol in a 13.2 mL solution.

A renewable fuel called ethanol is produced from corn and other plant components. The United States uses ethanol extensively, and more than 98% of gasoline contains some ethanol.

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Answer:

C) -3063J

Explanation:

multiply m, c, and change in T

A 0. 600 g sample of a compound of arsenic and oxygen was found to contain 0. 454 g of arsenic. The empirical formula of a compound is As₂O₃.

The mass of a oxygen in the compound is

Mass of O=(Sample mass-Mass of As)

=(0.600-0.454)g

=0.146 g

The atomic mass of arsenic(As) is 75 g/mol and of oxygen(O) is 16 g/mol. Hence moles of oxygen and arsenic are

Moles of As=0.454 g×(1 mol/78 g)

moles of As=0.006053 mol

Moles of O=0.146 g×(1 mol/16 g)

moles of O=0.009125 mol

Divide both moles by 0.006053 mol

moles of As=(0.006053/0.006053)=1

moles of O=(0.009125/0.006053)=1.508≈1.5

Since we cannot take fractional moles in a compound. Hence multiply by 2 to both values of moles

moles of As=(1×2)=2

moles of O=(1.5×2)=3

Since 2 and 3 are values in the subscript of the As and O. Hence, the empirical formula is As₂O₃.

Therefore, the empirical formula of a compound is As₂O₃.

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The amount of 0.100 M HCl that 400 mg of Tumsr can neutralize, measured in mL, is 32 mL.

Chemical A chemical reaction's reactants and products are studied quantitatively in stoichiometry. The Greek words "stoikhein" (which means element) and "metron" (which means measure) are the roots of the English word "stoichiometry."

CaCO3 makes up 40 percent of Tumsr. As a result, 400 mg of Tumsr will have

400 x 40/100 = 160 mg CaCO3

According to the reaction's equation:

CaCO₃ +  2HCl  →  CaCl₂ + H₂O +  CO₂(carbondioxide)

Mole ratio = 1:2

Mole of CaCO₃ = 0.16g/100 = 0.0016 moles

Equivalent mole of HCl = 0.0016 x 2 = 0.0032 moles

Volume of 0.0032 mole= 0.0032/0.1

Volume of 0.0032 mole = 32 ml.

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A domain is atomic if elements of the domain is considered indivisible units that is cannot be divided in parts.

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A gas's volume is inversely related to its pressure and directly related to both its temperature and its volume. The volume of a gas is thought to be directly proportional to its absolute temperature according to Charles' law.

The experimental gas law known as Charles' law, commonly referred to as the law of volumes, illustrates how gases tend to expand when heated. Charles's law can now be expressed as follows:

The Kelvin temperature and the volume will be directly proportional when the pressure on a sample of a dry gas is kept constant.

This direct proportional relationship can be expressed as follows:

V ∝T

It follows that:

[tex]\frac{V}{T} = k[/tex]

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Hydrolysis can happen to both cations and anions, however not all ions react in this way. Both the free cation and the free anion are created during the dissolution of an ionic salt in water.

The salt of the powerful acid (HNO3) and the powerful base (Ba(OH)2) is barium nitrate (Ba(NO3)2). Strong acids and strong bases do not hydrolyze in aqueous solution when their salts are present. In aqueous solution, barium nitrate (Ba(NO3)2) does not hydrolyze as a result.

Some instances of hydrolysis include dissolving a weak acid or base salt in water or dissolving sulfuric acid in water, which results in the formation of hydronium and bisulfate compounds. Proteins, lipids, and complex carbohydrates in diet are also broken down via hydrolysis.

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the cd 2 ion forms a tetrahedral complex with bromide ions Kf = 5.01×103  Formation equilibrium of [CdBr4]2- is  Cd2+(aq) + 4Br-(aq) <-------> CdBr42-(aq)  Dissociation Equilibrium of CdBr42- is  CdBr42-(aq.

What is the Difference Between Square Planar and Tetrahedral Complexes?

Tetrahedral complexes are coordination complexes that have a central metal atom surrounded by four constituent atoms in corners of a tetrahedron.

The structure of square planar and tetrahedral complexes, as well as the characteristics of transition metal complexes, are all well described by crystal field theory. The square planar complexes have a four-tiered crystal field diagram, whereas the tetrahedral complexes have a two-tiered crystal field diagram, which is the main distinction between the two types of complexes.

Additionally, transition metals with electron configurations that finish in d8 have a propensity to create square planar complexes, whereas metals with d0 and d10 have a propensity to form tetrahedral complexes.

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The structure of CO2 is linear as it has two oxygen atoms on both side of carbon, it nullifies the polar charge and makes it a nonpolar molecule.

According to Lewis structure we know that it denotes the number of electrons donated or shared to complete the octane rule (all atoms must have 8 electrons in the outer shell).

   Lewis's structure gives us the idea of whether a compound is basic or acidic in nature in terms of the electrons shared. In the given condition, for CO2 the Lewis structure is shown below.

  If we draw the Lewis structure for CO2, we will get a linear structure as it would contain two oxygen atoms on both side of carbon. As it contains two carbon atoms, it shares a covalent bond with carbon.

   As there are two oxygen atoms on both side of carbon and being equally electronegative it cancels out the charges and makes it a nonpolar molecule.

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The Galapagos Islands had slightly different tortoises on each of the islands is an observation that Darwin made on his voyage (Option C).

The evolutionary Darwin theory is a model proposed by Charles darwin about how species change (evolve) across time as a function of environmental characteristics and the process of natural selection.

Therefore, with this data, we can see that the evolutionary Darwin theory is based on different observations such as tortoises in the Galapagos islands which led to understanding the meaning of the evolution of the species.

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On a solid media, chromatography requires solvent separation. Different boiling points are used in distillation. A liquid is removed through evaporation from a solution to leave a solid behind. Filtration separates different-sized particles.

Chromatography is a method used in laboratories to separate mixtures into their constituent parts. The combination is dissolved in a liquid solvent known as the mobile phase, which transports it through a system where a substance known as the stationary phase is fixed.

Chromatography paper is another name for filter paper. Paper for chromatography is entirely white. Chemical analysis filter paper, quality filter paper, ashless filter paper, air filter paper, engine oil filter paper, fuel filter paper, etc.

The basis for gel filtration chromatography is the distinct migration of dissolved solutes through gels with predetermined-sized holes.

Thus, A column of insoluble but highly hydrated polymers, such as dextran, agarose, or polyacrylamide, is used in gel filtering or gel-permeation chromatography.

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a)  The brown color of bromine is discharged

b) There is an addition reaction occurring

c) The equilibrium that occur here is a dynamic equilibrium

We say that a system is in a state of equilibrium when the rate of the forward reaction is equal to the rate of the reverse reaction. In this case, we can say that the system is in a state of dynamic equilibrium.

a) We know that as the bromine is added to the ethene there would be the decolorization of the bromine water.

b) At the molecular level, the bromine is being added to the double bond in the alkene and a vicinal dihalide is produced.

c) The equilibrium is dynamic.

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A white solid precipitate is created when silver nitrate (AgNo3) and barium chloride (BaCl2) are combined.

The main distinction between a balanced equation and a net ionic equation is that a balanced equation displays all of the system's reactions together, but a net ionic equation just displays the net reaction that followed the conclusion of a given reaction.

Similar charges repel one another (positive to positive or negative to negative). A neutral item is one that typically has an even mix of positive and negative charges. Negative and positive charges in an item must balance out for static electricity to occur.

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The heat that enters or leaves the system is determined by the enthalpy change that takes place during a reaction. whether there is a rise in the system's enthalpy.

Kidney stones are frequently linked to calcium oxalate crystals, which can develop when the body has an excessive amount of oxalate (found in foods like spinach). Severe groin or stomach discomfort, nausea, fever, and problems urinating are all signs of kidney stones.

In healthy adults who consume 800 mg of calcium per day, two to twenty percent of the oxalate they consume is absorbed in their digestive tracts. The most effective moderator of oxalate absorption is calcium.

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The concentration of a dextrose solution prepared by diluting 17 ml of a 3.0 m dextrose solution to 25 ml using a 25 ml volumetric flask is 2.04 m.

This problem is solved by using the concept of concentration and volume.

As we know that,

C1 × V1 = C2 × V2

From the problem,

The initial concentration of dextrose C1 = 3.0 m

The initial volume of dextrose V1 = 17 ml.

The initial volume of dextrose V2 = 25 ml.

We have to find the final concentration of dextrose.

By substituting all the values, we get

3.0 × 17 ml = C2 × 25 ml

51 = C2 × 25 ml

C2 = 51 / 25

C2 = 2.04 m

Thus, we concluded that the concentration of a dextrose solution prepared by diluting 17 ml of a 3.0 m dextrose solution to 25 ml using a 25 ml volumetric flask is 2.04 m.

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Answer:

na atom

Explanation:

which is sodium because it has 11protons -10 electrons =+1.Hence the valency of sodium is 1

In the reaction between bleach and dye, the bleach was excess relative to the dye.

bleach is used for bleaching of cotton and linen in textile industry and also used as bleaching wood pulp in paper industry,  bleaching washed clothes in laundry.

It is the main constituent of a  solution which constitute ~3-6% sodium hypochlorite (NaOCl), is a mixed with small amounts of sodium hydroxide, hydrogen peroxide, and calcium hypochlorite.

Chlorine bleach is a  type of base and especially good at removing stains and dyes.

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Three molecules of ribulose-1,5-biphosphate are generated from the remaining five G3P molecules.

Calvin cycle, also known as the photosynthesis's light-independent phase. In this stage, glucose is synthesized using the NADPH and ATP created during the light stage.

There are three primary phases of the Calvin cycle: carbon fixation, reduction, and regeneration.

In the process of fixing carbon, ribulose-1,5-biphosphate, a CO2 acceptor, combines with three molecules of CO2 to produce two molecules of 3-phosphoglycerate. This reaction is catalyzed by RUBISCO (PGA)

PGA is reduced by NADPH during the reduction stage, and ATP phosphorylates PGA to generate six molecules of glyceraldehyde-3-phosphate (G3P). According to the answer, while the other five molecules of G3P continue in the cycle, one leaves it to be used to create glucose.

The initial five molecules of G3P are rearranged into three molecules of the five-carbon CO2 acceptor known as ribulose-1,5-biphosphate during the third stage, dubbed the regeneration stage (RUBP).

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a) 2Na₂N → 2Na + N₂ reaction type combination reaction.

b) H₃PO₄ +3KOH → K₃PO₄ + 3H₂O reaction type double-Replacement Reaction.

c) N₂ + 3H₂ → 2NH₃ reaction type combination reaction.

d) 2H₂O₂ → O₂ + 2H₂O reaction type combination reaction.

e) Zn + 2HCl  → ZnCl₂ + H₂ reaction type displacement reaction.

f) C₂H₆ + 7O₂  → 2CO₂ + 3H₂O reaction type combustion reaction.

g) CuCl₂ + H₂S  → CuS + 2HCl reaction type double displacement reaction.

The reaction arrow's left and right sides of a balanced equation have an equal number of each type of atom. The products go on the right side of the arrow when writing a balanced equation, and the reactants go on the left.

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HCl (g)+ NH

3

(g) → NH

4

Cl (s)

The following molecules can form hydrogen bonds.  the following molecules can form hydrogen bonds is H₂O.

Hydrogen bond is a type of bond in which attractive force between the hydrogen atom that is covalently bonded with  the more electronegative atom such as a N, O and F atom . so, from the given compound it is clear that the molecules which can form hydrogen bond is only water. it arise because of the  dipole dipole interaction. there are two types of hydrogen bonding : intramolecular hydrogen bonding and the intermolecular hydrogen bonding.

Thus, The following molecules can form hydrogen bonds.  the following molecules can form hydrogen bonds is H₂O.

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The isotope Z-22 has an abundance of 35% while Z-24 has an abundance of 65%.  the average atomic mass of element Z is 23.3 amu.

Z- 22 ,percent abundance = 35 %

                                            = 0.35

Z - 24 , percent abundance = 65 %

                                              = 0.65

average atomic mass = (mass × percent abundance + mass × percent

                                                                                              abundance )

                                    = (22 ×0.35 + 24 × 0.65)

                                    = 7.7 + 15.6

                                     = 23.3 amu

Thus, The isotope Z-22 has an abundance of 35% while Z-24 has an abundance of 65%.  the average atomic mass of element Z is 23.3 amu.

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No, work is not done whenever you hold a heavy object for a long time

The result of a force's displacement and its component of force exerted by the object in the direction of displacement is what is known as the force's work. When we push a block with some force, the body moves quickly and work is completed.

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