which isotope, when bombarded with oxygen-18, yields the artificial isotope seaborgium-263 plus 4 neutrons?

Ammonium nitrate , NH₄NO₃ dissolves spontaneously and endothermically in water because the temperature of solution decreases.  

When we add ammonium nitrate ,  NH₄NO₃ to water at 298 K , it dissolves spontaneously and the temperature of system decreases. this means the heat is absorbed by the system and when the heat is absorbed by the system the process is called as endothermic.  the ammonium nitrate when dissolve in water it will dissociates in to ions which requires the energy so heat is absorbed. this process in endothermic.

Thus, Ammonium nitrate , NH₄NO₃ dissolves spontaneously and endothermically in water because the temperature of solution decreases.

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The molarity of the ethanol is 11.29M .

What is molarity ?

Molar concentration, also known as molarity, amount concentration, or substance concentration, is a unit used to describe the amount of a substance in a solution expressed as a percentage of its volume. The number of moles per litre, denoted by the unit symbol mol/L or mol/dm3 in SI units, is the most widely used unit for molarity in chemistry. One mol/L of a solution's concentration is referred to as one molar, or 1 M.

The mass of one mole of ethanol is 46.07 g/mol.

The number of mole in 50.500 g ethanol is 50.500/46.07 = 1.096158 mole.

We know that,

Mass = Density × Volume.

The final volume of the solution 750.0ml and the density of the solution is 1.20g/ml.

The mass of the solution is 1.20g/ml × 750.0ml = 900 gm.

The mass of water is (900-50.500) = 849.5 gm.

So the term molarity is defined as:

One of the most common units of concentration, expressed in M. It is defined as no moles of solute in 1 liter of solution.

The molarity of the solution is:

(1.09615 × 1000)/ 849.5  = 1.29M (approx.).

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Substance A is a solid at 115° Celsius. Its particles are not moving while Substance B is a liquid at 115° degrees Celsius. Its particles are moving around freely.

Solid particles in substance A are not moving because they are held together by strong intermolecular forces. Liquid particles in substance B are moving around freely because they are not held together by strong intermolecular forces.

Intermolecular forces are the forces that hold molecules together. These forces are much weaker than the covalent or ionic bonds that hold atoms together in a molecule, but they are strong enough to keep molecules from flying apart. The four main types of intermolecular forces are dipole-dipole forces, London dispersion forces, hydrogen bonding, and ion-dipole forces.

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josh has 10 g of element a and 10 g or element b. when finished with the experiment, josh has 20 g of element a and b combined. This demonstrates ' Law of conservation of mass'.

In a closed system, mass cannot be created or destroyed, but it can be changed from one form to another. Thus, mass of a system remains same before and after the reaction.

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The bond length or separation between the two nuclei of X in a molecule of X2A with elemental bond length of 2.22A and 4.28A is 6.5A.

What is bond length?

The bond length or bond distance can be defined as the average distance between the nuclei of the bonded atoms in the given molecule. If it is a polyatomic molecule the bond distance can be calculated by adding the atomic radius of all the atoms involved in bonding.

The separation or bond length of the molecule X2A can be calculated as,

The bond length of elemental A = 2.22A

The atomic radius of A = 2.22 / 2 = 1.11A

The bond of elemental X = 4.28A

The atomic radius of X = 4.28 / 2 = 2.14A

The bond length of molecule X2A = (2.14 + 1.11) x 2 = 6.5A.

Therefore, the bond length or separation between the atoms X in the given  molecule is 6.5A.

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The concentration of the hydroxide ions after 50 ml of 0.250M NaOH is added to 120ml of 0.200M Na2SO4 is 7.35 x 10^-2 M.

What is meant by concentration?

Concentration is the total amount of solute present in the given volume of solution. this is expressed in terms of molarity, molality, mole fraction, normality etc. The term concentration mostly refers to the solvents and solutes present in the solution.

Concentration of hydroxide ions can be calculated by,

M (OH^-) = V (NaOH) x M (NaOH) / V (total) = 50ml x 0.250M / 50ml + 120ml = 0.0735M = 7.35 x 10^-2 M.

where M (OH^-) = concentration of hydroxide ions, V(NaOH) = volume of NaOH, M(NaOH) = concentration of NaOH.

Therefore, the concentration of the hydroxide ions after 50 ml of 0.250M NaOH is added to 120ml of 0.200M Na2SO4 is 7.35 x 10^-2 M.

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The temperature (in k) will be 126.509 K

Number of moles of Oxygen = 0.0938 mol

Pressure = 740 torr or 98658.6 Pa

Volume = 1.0 L or 0.001 m3

Temperature in K = ?

To find out the temperature (T) we use the ideal gas equation

    PV = nRT

As we have to find the temperature so rearrange the equation for T

    T = PV / nR

value of R = 8.314 J/mol.K

Put the values in the equation

   V = 98658.6 * 0.001 / 0.0938 * 8.314

   V = 0.000974 / 0.779853

   V = 98.6596 / 0.779853

   V = 126.509 K

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0.78 m³ is the volume of the same sample at standard temperature and pressure(stp) will be closest to the volume at 350 k and 1 atm.

The ideal gas law (PV = nRT) explains how the macroscopic properties of ideal gases are connected. The particles in an ideal gas are those that: (a) do not interact with one another; and (b) take up no space (have no volume). The ideal gas law does provide a good approximation of real gas behavior in many circumstances, but no gas is truly ideal.

PV = (nRT)

Where;

P₁ = initial pressure = 1 atm

V₁ = initial volume = 1 m³

T₁ = initial temperature = 350 k

P₂ = final pressure = 1 atm

V₂ = final volume = ?

T₂ = final temperature = 273 k

P₁V₁ / T₁ = P₂V₂ / T₂

Solving for V₂;

V₂ = P₁V₁T₂ / P₂T₁

V₂ = 1 × 1 × 273/350

V₂ = 273/350 m³

V₂ = 0.78 m³

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Answer:

Chemistry Secondary School answered Mg (OH)₂ + HCl→ MgCl₂ + H₂O balance it Answer 5.0 /5 6 Diabolical Answer: The answer will be; = Mg (OH)₂ + 2 HCl → MgCl₂ + 2 H₂O That's all. Find Chemistry textbook solutions? Class 12 Class 11 Class 10 Class 9 Class 8 Class 7 Class 6 Preeti Gupta - All In One Chemistry 11 3080 solutions

Atom pairs that are most likely to form an ionic bond is sodium and oxygen.

Thus, the correct option is C.

А pаir of elements will most likely form аn ionic bond if one is а metаl аnd one is а nonmetаl. These types of ionic compounds аre composed of monаtomic cаtions аnd аnions. We cаn check the periodic tаble to see thаt the cаtions аre monаtomic ions formed from metаls, аnd the аnions аre monаtomic ions formed from nonmetаls.

Sodium is a metal, and oxygen is a nonmetal; therefore, [tex]N_{2} O[/tex] is expected to be ionic.

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The alternative method to collect the gas and measure the volume is by a gas syringe.

What is a gas syringe?

Gas syringe is an equipment used to pump or withdraw gas from a closed container and can measure the volume of the gas produced in any chemical reaction.

The volume of the gas produced can be measured by reading the measuring scale on the gas syringe when the plunger moves in a gas syringe.

Hence, gas syringe is an alternative method to collect and measure the volume of the gas in a chemical reaction.

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Answer:

Ice wedging

Explanation:

The rocks crack fill with water and then expand

In solvent extraction, we use two solvents. The important characteristic of extracting solvent is it should be immiscible with the second solvent.

What is solvent extraction and why is it important?

What are immiscible liquids?

Immiscible liquids are those which won't mix to give a single phase.

Oil and water are examples of immiscible liquids.

Thus, in liquid-liquid extraction, the two solvents should be immiscible with each other.

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The molar mass of a substance can be calculated from its density alone if that substance is a gas at STP.

The molar mass of a substance is the mass of one mole of that substance.

One mole of a substance is the amount of that substance that contains as many elementary entities as there are in 12 g of carbon-12.

The number of particles in 12 g of carbon-12 is the Avogadro number = 6.03 * 10²³ particles.

One mole of all gases occupies the same volume at STP.

Also, the molar mass of a gas is related to the vapor density of that gas by the formula below;

Hence, the molar mass of a gas can be determined from the density of the gas by multiplying the vapor density of the gas. by 2.

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The first element whose atomic number is 21 is Scandium and the second element whose atomic number is 7 is Nitrogen. Based on electronic configuration

Electronic configuration is a systematic way of distributing the electrons in their orbitals  Electron configurations of atoms follow a standard notation in which all electron-containing atomic subshells (with the number of electrons they hold written in superscript) are placed in a sequence.

Electron Configurations are useful for:

Determining the valency of an element.

Predicting the properties of a group of elements (elements with similar electron configurations tend to exhibit similar properties).

Interpreting atomic spectra.

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Answer:

atom1:1s22s22p63s23p2

The correct responses that describe the various rules in the filling of orbitals are;

1) Aufbau principle

2) Pauli exclusion principle

3)  Hund's rule.

The orbital has to do with the region in space where there is a high probability of finding the electron. We have to know that that looking at the orbitals, we can know how electrons are arranged in the atoms in order of increasing energy.

The Aufbau principle shows us that when we try to fill the electrons into orbitals, we must start from the orbital that has the lowest energy. The Pauli exclusion principle states that no two electrons in an atom can have the same value for all the four quantum numbers. In other words, electrons in the same orbital must have anti parallel spins.

Also, when we are filling electrons into orbitals that have the same energy, we fill them in singly first. This is the statement of the Hund's rule.

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Quantitative measurement is being employed in a map of countries depicting the number of gold metals they won at the most recent olympics.

In this measurement the numbers are counted that thus can be used as reference tool. Numbers are used to express quantitative data, which are measures of values or counts. Numerical variables are the subject of quantitative data (e.g. how many; how much; or how often). Qualitative data can be represented by a name, symbol, or number code and are measures of "types."

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The process by which the ions are attracted to water and separate from each other when dissolved in water is called dissociation.

What is dissociation of ions in water?

The ionic salts when added to water dissolve in water by dissociation. The ions in the ionic compound break the bond between them and get dissolved in water. Water molecules reduce the electrostatic force between the ions and solvate them by surrounding them.

The positive ions of the ionic compound gets attracted to hydroxide ion of water which is negatively charged. The positive ion of the ionic compound gets attracted to protons in water which are positively charged. the ions in ionic compound dissolve by dissociation.

Therefore, due to dissociation the ionic compound dissolves in water and get attracted to opposite charges in water.

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The molarity of a solution that is prepared by dissolving 15.5 g of NaOH in 1.50 L of solution is

The given values are,

volume = 1.50 L

weight of NaOH = 15.5 g

Mass NaOH= 40 g/mol

Therefore, moles of NaOH is = weight / mass

                                                 = 15.5 / 40

                                                 =  0.3875

We know,

Molarity= moles of NaOH / volume

             = 0.3875 / 1.50

             = 0.25833 M NaOH

Therefore, we get the molarity of this solution as 0.25833 M NaOH

Molarity is defined as the number of moles of solute dissolved in one liter of solution. Also called molarity and represented by the letter "M". Molarity formula M = n/v where M is the molarity n is the number of moles v is the total volume of the solution in liters.

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Fossil fuel can be made to burn cleaner and reduce carbon dioxide emissions if it is combined with purified oxygen is coal.

Coal can be made to burn cleaner and reduce the carbon dioxide it it will combine with the purified oxygen. coal is type of fossil fuel. coal is black in color or brownish black. the fossil fuel coal is made up of plant. the plant gets their energy from the sunlight so, it is clear that col is from sun.  fossil fuels are non renewable source of energy.

Thus, Fossil fuel can be made to burn cleaner and reduce carbon dioxide emissions if it is combined with purified oxygen is coal.

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The Bohr model for the atom explains how electrons chenges different energy levels and accounted for the emission spectra of atoms.

The Bohr model postulates that electrons orbit the nucleus at constant electricity ranges. Orbits in addition to the nucleus exist at better electricity degrees. While electrons go back to a decreased strength level, they emit energy in the shape of light.

Bohr's model shows that the atomic spectra of atoms are produced via electrons gaining energy from a few supplies, leaping as much as a better electricity degree, then without delay losing returning to a lower strength stage and emitting the strength difference among the 2 power ranges.

Bohr explained the steadiness of atoms by using presenting that electrons revolve across the nucleus inside the exact circular paths having fixed strength and while transferring in the same orbit they do now not lose or benefit from strength.

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very polar compounds are sometimes purified by reverse phase chromatography where the stationary phase is very non-polar while the solvent is very polar.  this technique be beneficial with extremely polar compounds as it provides better solubility for the polar analytes.

The chromatography is the best technique to purified the organic compounds. if the stationary phase is polar it takes more times for polar molecule to absorbed in stationary phase. that's why we use reverse chromatography for the purified more polar compound.

Thus, very polar compounds are sometimes purified by reverse phase chromatography where the stationary phase is very non-polar while the solvent is very polar.  this technique be beneficial with extremely polar compounds as it provides better solubility for the polar analytes.

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781 g of hydrochloric acid in grams can be neutralized by 3.5 g of sodium bicarbonate.

To find out how much hydrochloric acid in grams can be neutralized by 3.5 g of sodium bicarbonate, we need to know the number of moles of HCl present, then multiply that by the molar mass of NaHCO3.

First, we calculate the number of moles of HCl present by solving for x:

x = Moles x 0.1 mol/L

= (Moles)(0.1 mol/L)(1000 mL)

= 100 mmol

Next, we multiply this number by the molar mass of NaHCO3:

=(84.007 g/mol)x(78.129 g/mol)

= 7.8129 x 100 mmol

= 781 g

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IUPAC nomenclature of structure 1 is 5-bromo-3-ethyl-2,2-dimethylhexane and for structure 2 it is  1,1,4-trimethyl-3 -(1-methylethyl)cyclohexane

IUPAC nomenclature is based on naming a molecule's longest chain of carbons connected by single bonds, whether in a continuous chain or in a ring. All deviations, either multiple bonds or atoms other than carbon and hydrogen, are indicated by prefixes or suffixes according to a specific set of priorities

In structure 1 the longest chain was found to be a 6 carbon chain and the numbering started from the side where it is highly substituted. Hence the name is 5-bromo-3-ethyl-2,2-dimethylhexane

In structure 2 we have a cyclic structure and so the numbering will be done in such a way that all the substituent gets the least numbering hence the name of the compound will be 1,1,4-trimethyl-3 -(1-methylethyl)cyclohexane

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The pH of the solution which was made by mixing 40ml of 0.100 M HCL with 25.00ml of 0.100 M KOH is 1.669.

The base and the acid have the same molarity, but the acid's volume is more than the bases' volume, hence after mixing the resultant solution is acidic.

The concentration of OH⁻ solution in the mixture is

= (molarity of base * volume of base - molarity of acid * volume of acid) / total volume

= (40 mL*0.1M - 25 mL *0.1 M ) / (40 mL +25mL)/ 1000)

= 0.021428571 M

pH = -log(0.021428571) = 1.669

Hence the pH is 1.669

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The component of colloid solutions that is helpful in managing hypovolemic shock through the intravenous route is option 3 Starches.

A colloid is an aggregate wherein one substance inclusive of microscopically dispersed insoluble debris is suspended throughout another substance. some definitions specify that the debris needs to be dispersed in a liquid, even as others expand the definition to encompass substances like aerosols and gels.

Colloids and crystalloids are two types of solutions used to replace lost blood fluid (plasma). They encompass blood and artificial products. each colloid and crystalloids seem like in addition powerful at resuscitation. There are one-of-a-kind varieties of colloids and those may have exceptional consequences.

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Disclaimer:- your question is incomplete, please see below for the complete question.

what is the component of colloid solutions that is helpful in managing hypovolemic shock through the intravenous route?

1. Salts

2. Sugars

3. Starches

4. Minerals

Helium moves more quickly on average than argon.

How much thermal energy does helium have compared to argon?

Helium has a lower thermal energy than argon does.

Explanation:

Due to the smaller mass of helium atoms in comparison to argon atoms, their average speed is higher under the given conditions. An atom's average speed is inversely related to its mass. While the average speed of an atom reduces as the mass of the atom grows, the opposite is true if the mass of the atom decreases.

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The order of the elements from smallest to largest atomic radius are O<C<Sn<Sr.

Atomic radius is the separation between an atom's outer electron shell and nucleus. 1/2 the distance between identical atoms that are bound together by their nuclei. Positively charged ions known as cations are smaller than their neutral atom.

Therefore, The distance between the center of the nucleus and the biggest shell inhabited by the valence electron of a neutral element is known as the atomic radius, which is an attribute of atoms. This would rely on the atom's atomic number and the quantity of electrons it contains.

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