What metals do halogens react with?

The moles of hno3 are present if 0.180 molmol of ba(oh)2 was needed to neutralize the acid solution is 0.36 mole of HNO₃.

Neutralization or neutralisation is a chemical reaction in which acid and a base react quantitatively with each other. In a reaction in water, neutralization outcomes in there being no excess of hydrogen or hydroxide ions gift inside the answer.

Calculation:-

Valance factor of HNO₃ is = 1

valance factor of Ba(OH)₂ is = 2

mole of Ba(OH)₂ is = 0.180

therefore mole oh HNO₃ neede is = 2 * 0.180

                                                         =  0.36 mole of HNO₃

Neutralisation is a chemical response wherein an acid and a base react with each different quantitatively. it's also written as Neutralisation. The acid electricity of the reactant gives the pH of the neutralised solution.

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As [Zn 2+] molar concentration increases, the E cell decreases. (Solvent of zinc sulphate) With a rise in [Cu 2+] molar concentration, the E cell grows. at various electrolyte concentrations, results.

A solute's molar concentration is the quantity of that solute in one unit of a solution. It can be measured in mol/L, mol/dm 3, or mol/m3. Molar concentration, also called molarity, is indicated by the letter M, or molar. Analyzing the health claims made for sports drinks and providing an overview of electrolytes. In chemistry and physics, an electrolyte is a material that conducts electricity after splitting into positively and negatively charged particles known as ions. Weak Electrolytes: Electrolytes that have not been fully dissolved into the solution.

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The reaction is exothermic in this Hydrogen, when combined with oxygen in a chemical reaction, forms water.

The response among hydrogen and oxygen is exothermic- it releases power to the surroundings: hydrogen + oxygen → water 2H2 + O2 → 2H2O Fuel cells use the response among a gasoline and oxygen to provide electric energy. Hydrogen is flamable and it burns with a popping sound in oxygen with an nearly colourless flame to shape water molecules and launch heat.

This response is noticeably exothermic. Formation of water from hydrogen and oxygen is a aggregate response due to the fact hydrogen and oxygen are combining to shape unmarried product. The response takes place as follows: 2H2(g)+O2(g)→2H2O(l). The response of hydrogen with oxygen to shape water is an exothermic response.

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For the post-obit, the Sn1 reaction, depicts the major organic product, identifies the nucleophile, substrate, and leaving grouping, and decides the rate-limiting step.

As shown in the diagram for the following Sn1 reaction, draw the major organic product, identify the nucleophile, substrate, and leaving grouping, and determine the rate-limiting steps.

Select the argument that properly identifies the reaction nucleophile, substrate, and leaving group. (CH3)2COH is the substrate, HCl (hydrochloric acid) is the nucleophile, and OH is the leaving group. (CH3)3COH is the substrate in the reaction, Cl is the nucleophile, and H20 is the leaving group in this reaction.

(CH3)3COH is the substrate, CF is the nucleophile, and OH is the leaving group in the reaction. The charge per unit limiting footsteps.

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Polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. Therefore, Ksp for copper (II) hydroxide is 1.58x10⁻¹³.

Solubility shows the extent of solubility of a solute in solvent to make a solution. Solute is substances that is present in small amount. solvent is a substance that is present in large amount. Its SI unit is gram per litre or g/L.

Bond strength affect the solubility of a solute in solvent. weaker the bond strength is, more the solubility is. The weaker bond can be easily broken by water molecule.

pH= -log[H⁺]= 11.15

[H⁺]=7.07×10⁻¹²

[H⁺]×[OH⁻]=10⁻¹⁴

[OH⁻]=10⁻¹⁴÷7.07×10⁻¹²

        =0.141×10⁻²

        =0.00141M

                                                M(OH)[tex]_2[/tex][tex]\rightarrow[/tex]M+²+    2OH⁻

Initial concentration(M)                           0             0

Change in concentration(M)|                 +S           +2S

Equilibrium concentration(M)|                 S               2S

Ksp = [ Cu+² ] [ OH⁻] ²

=(S)(2S)²

=4S³

S= 3.41x10⁻⁵ g/L

Substituting the values, we get

Ksp =4(3.41x10⁻⁵)³

=158.6x10⁻¹⁵

=1.58x10⁻¹³

Therefore, Ksp for copper (II) hydroxide is 1.58x10⁻¹³.

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The volume of a rectangular box with length of 25.0 cm width of 7.0 cm and height of 3.5 cm is 612.5 cm³

Volume is a measure of the occupied three-dimensional by its  space. It is often used to quantified numerically me know using SI derived from the center units or by the way various imperial or US customary units. The speed of definition of length is interrelated with the volume.

The volume of cuboid can be calculated by multiplying the width and length and height all together

Here,

Length = 25 cm

Width = 7 cm

height = 3.5 cm

So volume of the box is:

= 25×7×3.5

= 612.5 cm³

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No, if the hydrogen atom's energy were proportional to n (or any power of n), it would become infinite as n increased in size. However, n2 has an inverse relationship with the atom's energy. As a result, as n increases to infinity, the atom's energy gets closer to the ionization energy, or 13.6 eV, which is a value that is a finite amount above the ground state. Its energy loss is never greater than the ionization energy as the electron transitions from one bound state to another. Any emitted photon has a limited amount of energy and frequency.

As n rises, energy magnitude decreases, but the electron's energy rises because of the negative sign.

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The calcium chloride concentration to be thrown on the concrete should not exceed 2%.

Calcium chloride solution is a compound that is used to remove the eyes from the dry base during the winter season in the cold are region of the world.

Calcium chloride releases heat when spread over the ice. This released heat melts the ice.

Calcium chloride has a much lower melting point than that of the ice, it release 3 ions when it dissociates on the surface of the ice. This allows the eyes to melt.

But the concentration of the calcium chloride solution that has to be added to the concrete should not exceed 2% because further concentration may harm the quality of the concrete which is not a good thing.

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The wavelength is 3.975 × 10^-19 J.

Wavelength can be difined as the distance between two successive crests or throughs of a wave.

To find out the energy in joules given the wavelength of a photon we have to  Use the  Planck's equation E = h x c / λ and substitute the values of   the wavelength (λ), Planck's constant in joules (h = 6.6261 × 10⁻³⁴ J⋅s), and speed of light (c = 299792458 m/s). With these units, you'll get an energy result in joules (J).

Energy of photons,

E = hc/λ

(6.626 × 10-34Js) × (3 × 108ms-¹)/

5 x 10-7

= 3.975 × 10^-19 J

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Answer:

D

Explanation:

The answer to question 4) is 5.79×10^22

8.96 is the pH after 15.00 ml of hcl has been added.

What is pH?

The H+ ion concentration's negative logarithm is known as pH

We are aware that not every acid or base reacts with a chemical substance at the same pace. Other people respond extremely strongly, some people mildly, and some people don't react at all. We utilise a universal indicator that exhibits various colours at various concentrations of hydrogen ions in solution to objectively assess the strength of acids and bases

0 mL of NaOH has not been added, leaving a pH of 2.32.

Only HCOOH is present in the solution prior to the addition of any NaOH. The balance of the HCOOH in solution controls pH.

Ka = HCOO- concentration times H3O+ concentration divided by HCOOH concentration

8.96 is the pH after 15.00 ml of hcl has been added.

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tert−Butyl iodide or tert−Butyl chloride, tert−Butyl iodide reacts at the faster rate.

Unimolecular nucleophilic substitution process is equivalent to the SN1 reaction.Reactions occur in a single order.An illustration of an SN1 reaction is the hydrolysis or tert-butyl bromide in an aqueous NaOH solution.

Two of the most frequent chemical reactions in organic chemistry are SN1 and SN2.SN1 is a substitution-nucleophilic addition reaction that frequently involves both benzene and carbonyl compounds.Another kind of nucleophilic substitution known as an SN2 is more frequently seen with alkyl halides and benzoins.

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Answer:500g

Explanation: 500g

Explination: no chocolete was lost in the chopping of chocolate so it remains 500g

The transition metals that are paramagnetic but can easily form ferromagnetic alloys with other metals are Iron, Cobalt, and Nickel.

Hence, the correct option is C: Transition metals in groups 8-10, periods 4 and 5.

Paramagnetic substances are substances that are weakly attracted to magnets. The atoms of paramagnetic substances contain electrons that mostly spin in the same direction. They include aluminum, gold, and copper.

Ferromagnetic substances are substances that are strongly attracted to magnets when placed near magnets. They include metals such as Iron, Cobalt, and Nickel.

Transition metals are metals that have partially filled D-orbitals. Hence, transition metals are paramagnetic as well as ferromagnetic.

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Answer:  C) Transition metals in groups 8-10, periods 4

Explanation:

Thickening the material involved is a way in which the rate of thermal energy transfer into the pie can be maximized.

This is referred to as the degree of hotness or coldness of a substance and it is influenced by thermal energy. It is usually measured with the use of a thermometer and the S.I unit of this type of measurement is Kelvin.

The way in which the rate of thermal energy transfer can be maximized is by thickening the material as it will ensure that the atoms are tightly packed together which permits the flow of electrons or heat between them in this scenario.

The arrangement of the atoms ensures that the thermal energy is easily absorbed and also has a relative high specific heat capacity thereby making it the correct choice.

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the energy of a photon that is emitted as a hydrogen atom makes a transition between the n is 13.6(n^2 - 1)/n^2 eV

From the hydrogen atom's first excited state to its ground state, an electron transitions.

the given part is

   n1 = 1  and   n2 = n

The energy of photon released,

E=13.6(1/n1^2 – 1/n2^2) eV

= 13.6(1/1^2 – 1/n^2) eV

= 13.6(n^2 - 1)/n^2 eV

The following hypotheses form the foundation of Bohr's model:

• He hypothesized that an atom's electron can move within a specified stable, circular orbits around the nucleus without producing radiation.

• Bohr discovered that the electron's angular momentum is quantized in size.

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Alanine, arginine, glutamine, and histidine are all amino acids, but they are classified differently based on their side chains.

Thus, alanine is neutral nonpolar, arginine is basic, glutamine is neutral polar, and histidine is acidic.

Since the task isn't complete, here's the full question:

Classify these amino acids as acidic, basic, neutral polar, or neutral nonpolar.

Drag each item to the appropriate bin.

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Two of the samples could be combined and their melting points compared to demonstrate the presence of distinct materials in the test tubes. The two substances are distinct if the melting point is lower than the theoretical melting point. They are the same substance if the melting point of the sample doesn't change.

The melting point is a solid's physical characteristic that can be used to identify a substance. In reality, a solid typically melts over a wide temperature range rather than at a single, set temperature. Because of this, speaking of a melting point range is more useful.

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Continental polar (cP) or continental arctic (cA) air masses are cold, dry, and stable.

These air masses originate over northern Canada and Alaska as a result of radiational cooling.

They move southward, east of Rockies into the Plains, then eastward. air mass would show the most dramatic change in both temperature and moisture content as it moves over a large body of very warm water

What does air mass cP mean?

The same arctic air mass will pick up some of the heat from the earth if it goes south from Canada into the southern U.S., but it will stay quite dry due to a lack of moisture. A continental polar air mass is what this is (cP).

During the winter, a continental polar air mass can develop over the land. It comes from northern Canada or Alaska in the Northern Hemisphere. It transports dry weather to the United States as it goes south.

Cp. In a system, Cp is the quantity of heat energy that is emitted or absorbed by a unit mass of the substance with a change in temperature at a constant pressure. It is the transmission of heat energy between a system and its surroundings under constant pressure, to put it another way.

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in the lewis resonance structure for ammonium ion (nh4 ) in which the central n atom is singly bonded to each of the four h atoms on the n atom positive charge is present.

Ammonia is a colorless, intensely unpleasant gas with a pungent, choke-inducing smell. It readily dissolves in water to produce an ammonium hydroxide solution that can irritate the skin and burn. Ammonia gas is easily compressed and, when put under pressure, turns into a clear, colorless liquid.

The ammonia has normally three hydrogen attached to central nitrogen atom carrying lone pair. When fourth hydrogen attaches to the central atom positive charge appear on the central atom.

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The final temperature of the mixture assuming no heat loss to the surroundings is 311.25 K.

The final temperature of the water mixture is calculated by,  T(final) = (m1 T1 + m2 T2) / (m1 + m2), where m1 and m2 are the weights of the water in the first and second containers, T1 is the temperature of the water in the first container, and T2 is the temperature of the water in the second container.

Let the final temperature be 'T' k

heat lost by 50 g water = heat gained by 30 g water

50*C*(330-T) = 30*C*(T-280)

50*(330-T) = 30*(T-280)

16500 - 50*T = 30*T - 8400

80*T = 24900

T = 311.25 K

Therefore, the final temperature of the mixture is 311.25 K.

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The enzymes that regulates the malonyl CoA is camitine acyltransferase.

1) citrate and fatty acids/fatty acul coa

2) camitine acyltransferase

3) high conc fatty acids in cytosol inhibits fatty acid synthesis

4) high conc malonyl coa inhibits B oxidation

Enzymes are proteins that function as biological catalysts by accelerating chemical reactions. Molecules on which enzymes can act are called substrates, and enzymes convert substrates into various molecules known as products. Almost all metabolic processes in cells require enzymatic catalysis in order to run fast enough to sustain life.

Metabolic pathways are linked to enzymes that catalyze individual steps. The study of enzymes is called enzymology, and in the field of pseudoenzymatic analysis, it is recognized that some enzymes have lost their ability to perform biological catalysis over the course of evolution. . This is often reflected in their amino acid sequence and unusual "pseudocatalytic" properties.

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The partial pressure of ne 1.1 atm, hence the Correct Option is a).

Solution:

partial pressure of Ne = mole fraction x total pressure

10/20 / 10/20+ 10/40 = 0.6875

partial pressure of Ne = 1.6 x 0.6875 = 1.1 atm

or

Moles of Ne = 10/20 = .5 moles

Moles of Ar = 10/40 = .25 moles

Partial pressure of Ne = .5*1.6/.75 = 1.06 nearly equal to = 1.1 atm

The partial pressure of a gas is a measure of thermodynamic activity of the gas's molecules.

In a mixture of gases, each constituent gas has a partial pressure which is the notional pressure of that constituent gas as if it alone occupied the entire volume of the original mixture at the same temperature. The total pressure of an ideal gas mixture is the sum of the partial pressures of the gases in the mixture (Dalton's Law).

The partial pressure of a gas is a measure of thermodynamic activity of the gas's molecules. Gases dissolve, diffuse, and react according to their partial pressures but not according to their concentrations in gas mixtures or liquids. This general property of gases is also true in chemical reactions of gases in biology. For example, the necessary amount of oxygen for human respiration, and the amount that is toxic, is set by the partial pressure of oxygen alone.

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This atom is most likely to have a charge of -2, +4, +6 oxidation state.

Sulfur has mass the of 32.07 u and its atomic number is 16.

In the oxidation states of 2, 4, and 6, respectively, sulfur can form the compounds sulfide , sulfite, and sulfate. It blends with almost all other components. Because sulfur exhibits catenation, or the bonding of one identical atom to another, second only to carbon, some sulfur compounds have an interesting property. As a result, sulfur atoms can organize into chains and ring systems. There are  the major important sulfur compounds and chemical groups.

Sulfur usually is on -2, +4 or +6 level of oxidation states  (but it can be also on the  5, 3, 2, 1, -1 ).

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The amount of time it takes for half of the radioactive atoms present to decay is known as the radioactive half-life. When a radioisotope changes into another radioisotope, the process is known as radioactive decay, and radiation of some kind is released. The integrated first-order rate law describes radioactivity.

First-order reactions include those in radioactive decay. The rate of decay, also known as activity, of a sample of a radioactive substance is the decrease in radioactive nuclei per unit of time.

The integrated rate rule for the first-order reaction A's products is ln[A] t = -kt + ln[A] 0. An illustration of the natural log of [A] as a function of time is given since this equation has the form y = mx + b.

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The effect of intermolecular attraction on the properties of gas becomes more significant.

A gas is a substance that has no constant size or form. Whilst inside a closed container, gasoline will amplify to fill the field. An instance of gas is the air you breathe. The gas interior of your digestive tract is fabricated from the air and different gases.

Traits of Gases :

* Gases have neither definite shape nor particular volume. They expand to the dimensions of their container.

* Gases are fluid and go with the flow effortlessly.

* Gases have low density, except compressed.

* Gases diffuse (mix and unfold out) and effuse (tour thru small holes).

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Gabriel synthesis produces primary amine through an SN2 reaction.

A primary amine is produced by the Gabriel synthesis using the SN2 reaction. Phthalimide is first deprotonated using a base to form a nucleophile. The original structure is inverted due to the negatively charged N attacking the alkyl halide from behind. Acid hydrolysis, base hydrolysis, or the application of hydrazine are all methods for liberating the main amine. The S configuration of the alkyl halide reactant is present. Gabriel synthesis involves an SN2 reaction,

Hence, the main alkyl amine product will be configured as R.

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25 percentage of a radioactive element will be left after 2 half-life time.

Time = n × t 1/2

After 1 half time time there will be 50 % original isotope and 50% of decay product. After 2 half time 25 % of original isotope and 75 % of decay product is there.

A quantity (of substance half-life )'s (symbol t12) is the amount of time needed for it to decrease to half of its original value. The phrase is frequently used in nuclear physics to refer to how long stable atoms last or how quickly unstable atoms decay radioactively. In a broader sense, the phrase is used to describe any exponential decay (or, very rarely, a non-exponential decay). For instance, the biological half-life of medications and other substances in the human body is discussed in the medical sciences. In exponential growth, doubling time is the opposite of half-life. A characteristic unit for the exponential decay equation, half-life is constant during the course of an exponentially decaying quantity's lifetime. The table below illustrates how a quantity decreases in relation to the number.

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(a) The number of molecules of gas in the container will be 4.1583 x 10⁻⁵ moles

(b) The moles of gas remaining in the container will be 1.231482x 10⁻²⁰ moles

For a

Volume of gas = 1.0 x 10⁻⁶ m³

Temperature of gas = 20 °C or 293 K

Pressure = 1.013 x 10⁵ Pa

R = 8.3143 J/mol.K

We will calculate the number of molecules from the ideal gas equation.

    PV = nRT

Rearrange the equation for the number of moles

    n= PV / RT

Put the values

    n = (1.013 x 10⁵ Pa) (1.0x10⁻⁶ m³) / ((8.3143 J/mol.K) (293 K))

    n = 4.1583 x 10⁻⁵ moles

For b

Volume of gas = 1.0 x 10⁻⁶ m³

Temperature of gas = 20 °C or 293 K

Pressure = 1.0 x 10⁻¹¹ pa

We will calculate the number of moles from the ideal gas equation.

    PV = nRT

Rearrange the equation for the number of moles

   n = PV / RT

   n = (3.0 x 10⁻¹¹ Pa) (1.0 x 10⁻⁶ m³) / (8.3143 J/mol.K) (293 K)

   n = 1.231482 x 10⁻²⁰ mol

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