The net combination of electron for the bond strength of a molecule , Bond order allows us to identify.
In chemistry, the strength with which a chemical bond keeps two atoms together is known as bond strength. The energy needed to break the bond is often given in units of kilocalories per mole. As the number of electron pairs in a bond between two atoms rises, so does the bond's strength. Thus, triple bonds are stronger and shorter than double bonds between the same two atoms, and double bonds are similarly stronger and shorter than single bonds between the same two atoms.
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i cant figure out the last one because the first one is toxic the second one is radiation danger and the third one is biohazard but i don't know the last one
Answer: Chemical weapon
Explanation: This symbol usually exists where a chemical agent is being produced. It's to tell you to be really careful around these kinds of places.
Why is stoichiometry important?
Stoichiometry is a key concept in chemistry that allows us to calculate reactant and product amounts using balanced chemical equations. We employ the ratios from the balanced equation in this situation.
It aids in predicting the amount of a reactant that will be involved in a chemical reaction, the amount of product you'll get, and the amount of reactant that may be left over. The manufacture of many items you use on a daily basis is based on stoichiometry. Some of the products you use that are chemically manufactured or created through chemical reactions include soap, tires, fertilizer, fuel, deodorant, and chocolate bars. We may utilise stoichiometry to forecast and plan the results of numerous chemical processes, from planning for s'mores to simplifying manufacturing and generating environmental data.
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how many moles of water are formed when 28.0 ml of 0.250 m hno3 and 53.0 ml of 0.320 m koh are mixed?
The amount of water that will be created is 0.007 moles, while the amount of OH ions present is 0.123 M.
Given are V = 28 ml and molarity = 0.250 M for nitric acid.
Nitric acid has a molecular weight of 0.250 (28/1000) = 0.007 mol.
V = 53 ml and molarity = 0.320 M are provided for KOH.
KOH has a molecular weight of 0.320 (53/1000) = 0.01696 mol.
Nitric acid is the reaction's limiting reagent as a result.
One mol of nitric acid results in one mol of water, according to the chemical equation.
As a result, 0.007 mol of nitric acid will result in 0.007 mol of water.
Nitric acid is completely destroyed, but the remaining KOH will produce an excess of OH ions, which equals 0.01696 - 0.007 = 0.00996 moles.
The solution has a total volume of 28 + 53 = 81 ml, or 0.081 ml.
The amount of excess OH ions is equal to 0.00996/0.081 = 0.123 mol/L.
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An electrolyte will yield ions by undergoing a:
An electrolyte will yield ions by Dissolving in water.
Electrolytes:
Some compounds undergo a physical or chemical change that results in ions in solution when they are dissolved in water. These substances belong to the significant class of substances known as electrolytes. Nonelectrolytes are substances that do not produce ions when dissolved. A substance is referred to as a strong electrolyte if the physical or chemical process that produces the ions is virtually 100% effective (all of the dissolved molecule gives ions). Weak electrolytes are those in which only a very small portion of the dissolved substance goes through the ion-producing process.By measuring the electrical conductance of an aqueous solution containing the substance, substances can be classified as strong, weak, or nonelectrolytes. A substance must include freely moving, charged species in order to conduct electricity. Electricity is most commonly conducted through metallic wires, in which case electrons are the moving, charged particles. If dissolved ions are present in a solution, it may also conduct electricity, with conductivity increasing with ion concentration. The relative concentration of dissolved ions can be determined by applying a voltage to electrodes positioned in a solution. This can be done quantitatively by measuring the electrical current flow or qualitatively by examining the brightness of a light bulb incorporated into the circuit.To know more about Electrolytes:
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What the frequency of an electromagnetic radiation with wavelength of 4. 257 x 10^-9 m what type of EMR i thi
the wavelength of an electromagnetic wave is 4. 257 x 10-9 m, and its frequency is 0.7047 * 10¹⁷ s⁻¹
λ=4.257nm=4.257x 10^-9 m [∵1nm=10⁻⁹m]
c=3×10⁸ m/sec
c=vλ
[tex]v=\frac{c}{λ}[/tex]
=3*10⁸/4.257x 10⁻⁹
=0.7047 * 10¹⁷ s⁻¹
Physically speaking, electromagnetic radiation (EMR) is made up of electromagnetic (EM) field waves that travel through space carrying electromagnetic radiant energy. It consists of microwaves, X-rays, gamma rays, infrared, visible light, and other electromagnetic waves. A spectrum of electromagnetic wave includes each of these waves.
Traditional electromagnetic radiation is made up of electromagnetic waves, which are coordinated oscillations of the electric and magnetic fields. A periodic shift in the electric or magnetic field is what causes electromagnetic radiation or waves to be produced. Different electromagnetic spectrum wavelengths are created depending on the power generated and how this periodic shift happens. Electromagnetic waves move at the speed of light in a vacuum, typically abbreviated as c. The two fields oscillate in a manner that is perpendicular to one another in homogeneous, isotropic media.
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which type of crystalline solid is characterized by high mobility of electrons throughout the solid?
Metals are excellent conductors of electricity because electrons can travel freely throughout the entire solid. Metals are excellent at distributing energy, which contributes to their high electron mobility and their ability to conduct heat.
Glass and plastic are frequent examples of this type of solid. Four different varieties of crystalline solids exist: Solids with ions— electrostatic forces hold the positive and negative ions that make up the substance together. They have poor solid-state conductivity and extremely high melting points and brittleness.
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Draw the Lewis structure of IF4+ and then answer the following questions about it.
What is its steric number? [ Select ] ["0", "1", "2", "3", "4", "5", "6"]
What is the electron group geometry? [ Select ] ["linear", "trigonal planar", "tetrahedral", "trigonal bipyramidal", "octahedral"]
What is the molecular geometry? [ Select ] ["linear", "trigonal planar", "bent", "tetrahedral", "trigonal pyramidal", "trigonal bipyramidal", "see saw", "T-shaped", "octahedral", "square pyramidal", "square planar"]
What is the hybridization of I? [ Select ] ["sp", "sp2 (the 2 should be superscript)", "sp3 (the 3 should be superscript)", "sp3d (the 3 should be superscript)", "sp3d2 (the 3 & 2 should be superscript)"]
Is the molecule polar? [ Select ] ["yes", "no"]
How many sigma bonds are in the molecule? [ Select ] ["0", "1", "2", "3", "4", "5", "6"]
How many pi bonds are in the molecule? [ Select ] ["0", "1", "2", "3", "4", "5", "6"]
A total of 36 valence electrons make up the IF4: seven from the iodine atom, seven from each of the four fluorine atoms, and one from the negative charge. Iodine will serve as the main atom. Four single bonds will be created with fluorine atoms, totaling 8 of the 36 available valence electrons.
Does the planar square shape of if 4 exist?
Hybridization is therefore [sp3d2], and although the molecule has an octahedral structure, the atom's geometry is square planar because iodine carries two lone pairs of electrons, one above and one below the plane. As a result, the molecule has a square planar shape.
What is water's steric number?
In the case of water, the central oxygen atom possesses two non-bonding pairs and is connected to two hydrogen atoms. The steric number for water is 4, which is calculated as the sum of the number of atoms linked to the central atom plus the number of non-bonding pairs.
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patterns what patterns did you observe in the development of the periodic table? how were the patterns related to the timeline?
The atoms tend smaller or slightly larger, and their reactivities fluctuate left to right within a row.
What is a periodic table explanation?The stoichiometry of chemical elements, sometimes termed the multiplication table, organizes all recognized ingredients in rows (dubbed periods) and column (repeating groups) according to atomic numbers.
Why does it have the name periodic table?Because of the orderly arrangement of the elements, it is known as the periodic table. You'll notice they're organized rows and columns. Periods and Groups are the names given to the horizontal rows that run from left to right and the two columns that run from top to bottom, respectively.
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Which star type has a surface temperature of 4000 K and a luminosity 1000 times greater than the Sun? dwarf
The star type that has a surface temperature of 4000 K and a luminosity 1000 times greater than the Sun is a main sequence star, also known as a dwarf star.
Dwarf stars are the most common type of star in the universe, and they are characterized by a surface temperature of between 3000 K and 7000 K. These stars are relatively small and have a mass similar to that of the Sun, but they are much more luminous, with a luminosity that can be 1000 times greater than the Sun.
Dwarf stars are classified into different spectral types based on their surface temperature, with stars like the Sun being classified as G-type dwarf stars. A star with a surface temperature of 4000 K would be classified as a K-type dwarf star.
Dwarf stars are important because they are the primary source of energy for planetary systems, and they are also the primary source of heavy elements that are necessary for the formation of planets and life.
what is the emf generated by an cu-co electrode pair in a 1 molar solution of ions at standard temperature? answer in volts.
An pt-cu electrode pair in a 1 molar solution of ions at room temperature produces an emf of 4.124 v.
The temperature of a substance is defined as the sum of the kinetic energies of all its atoms or molecules. As a result of withdrawing energy, atoms and molecules move less quickly, which causes the temperature to drop (cooling). The three temperature scales that are now in use are Fahrenheit, Celsius, and Kelvin.
E-cell = E-cathode-E-anode, or 1.2-(-2.924) = 1.2+2.924 = 4.124 v
4.124 v for E° cell
What is the SI equivalent of EMF?Volt is used to measure electromotive force. The number of Joules of energy provided by the source divided by each Coulomb to permit a unit electric charge is how electromagnetic fields are mathematically expressed.
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1- list the definition of defense mechanisms: a. sublimation b. reaction formation c. displacement d. repression e. denial f. projection g. identification h. introjection i. undoing
List the definition of defense mechanisms: denial, repression, projection, displacement, regression, sublimation, rationalization, reaction formation, introjection & identification.
Explain the defense mechanisms ?According to psychoanalytic theory, a defense mechanism is an unconscious psychological process that guards against anxiety-inducing thoughts and sensations associated with internal conflicts and external pressures.Depending on the situation and how often it is utilized, defense mechanisms can have either helpful or detrimental effects. Defense mechanisms, or Abwehrmechanismen in German, are psychological techniques used by the unconscious mind to control, reject, or distort reality in order to combat anxiety-inducing emotions and undesirable impulses and to preserve one's self-schema or other schemas.Repression, or the hiding of an unpleasant feeling or thought from one's awareness, even though it might reappear in a symbolic form; identification, or assimilating an object or thought into oneself; and rationalization, or the justification of one's behavior and motivations by substituting "good" acceptable reasons for the actual motivations, are some of the processes that manipulate, deny, or distort reality.Learn more about Defense mechanisms refer to :
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color in a unit cell of this two-dimensional lattice:
The color in a unit cell of a two-dimensional lattice is determined by the arrangement of atoms within the lattice structure. A unit cell is the smallest repeating unit within the lattice, and it contains all of the atoms within the lattice.
The atoms are arranged in a regular pattern, which can be described as a crystal lattice.The color in a unit cell is determined by the type of bonds that exist between the atoms in the lattice. Different types of bonds will produce different colors. For example, ionic bonds are strong and result in a bright, vivid color, while covalent bonds are weaker and produce a more muted color. Metals, on the other hand, have metallic bonds, which produce a metallic sheen.
The color of a unit cell can also be affected by the properties of the atoms themselves. For example, if the atoms have a large difference in electronegativity, the unit cell may appear to have a strong color contrast. Additionally, the color can vary depending on the angle at which it is viewed.In summary, the color in a unit cell of a two-dimensional lattice is determined by the type of bonds that exist between the atoms, as well as the properties of the atoms themselves. These factors will determine the overall appearance of the unit cell.
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Draw the Lewis structure for bromoethane C2H5Br . Be certain you include any lone pairs.
The Lewis structure is attached below:
What is the Lewis structure?Lewis structures also called electron dot structures, or Lewis electron dot structures, are diagrams that show the bonding between atoms of a molecule, as well as the lone pairs of electrons that may exist in the molecule.
The Lewis rule states that Hydrogen atoms form only single bonds and they are always at the ends of a sequence of atoms. Hydrogen often is bonded to carbon, nitrogen or oxygen. Oxygen atoms usually do not bond to each other, except for O2, O3, superoxides and peroxides.
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In 1886 a Swiss schoolmaster, Johann Jacob Balmer, published a paper in which he described a
numerical relationship for the prominent lines in the atomic spectrum of hydrogen which appear in
the visible region and near ultraviolet region of the spectrum (approximately 250 nm to 700 nm).
For the transitions that occur in this region, list the wavelengths and energies involved and determine
the characteristic that these lines have in common.
Any line in this range will belong to the Balmer series since the wavelength of the two series that are closest to it are not in the range of 250 nm to 700 nm.
How can the number of lines in a hydrogen spectrum be determined?Possible numbers for spectral lines are (n2-n1)(n2-n1+1)/2.The wavelength of this light can be calculated to be 486.3 nm, which is consistent with the experimental value of 486.1 nm for the blue line of the hydrogen atom's visible spectrum.Even though a hydrogen atom only has one electron, it has several shells. Therefore, a photon is released when this single electron moves from one shell to another, and the energy difference between the shells is revealed.Any line in this range will belong to the Balmer series since the wavelength of the two series that are closest to it are not in the range of 250 nm to 700 nm.To learn more about hydrogen atom refer to:
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a chemist measured the amount of hydrogen bromide produced during an experiment. she finds that of hydrogen bromide is produced. calculate the number of moles of hydrogen bromide produced.
Molar mass of HBr is 80.91194 g/mol.
Molar mass of Br = 79.904
molar mass of H = 1.00794
Molar mass of HBr = 79.904 + 1.00794 = 80.91194
The mass of a sample of a chemical compound divided by the quantity, or the number of moles in the sample, expressed in moles, is known as the compound's molar mass. The molar mass is a bulk property of a material rather than a molecular one. The compound is present in many different forms, each with a different mass as a result of the isotopes. The molar mass is the average of these masses. The molar mass is most frequently calculated using the standard atomic weights and is a function of the relative abundance of the constituent atoms' isotopes on Earth. It is thus a terrestrial average. The conversion between a substance's mass and amount can be done using the molar mass.
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Write the chemical formula for (a) ruthenium(III) sulfide (b) scandium fluoride (c) osmium(VIII) oxide (d) manganese(II) sulfide (e) platinum(IV) chloride.
The chemical formula for ruthenium (III) sulfide, scandium fluoride, osmium (VIII) oxide, manganese (II) sulfide, and platinum (IV) chloride are Ru₂S₃, ScF₃, OsO₄, MnS, and PtCl₄.
Ionic compounds are formed from metal and non-metal ions. The metal ions have positive ions and the non-metal ions have negative ions. To achieve stability, they use electrons together. The name of the ionic compound called the chemical formula.
A. Ruthenium (III) sulfide
Positive ion ruthenium (III) = Ru⁺³B. Scandium fluoride
Positive ion scandium = Sc⁺³C. Osmium (VIII) oxide
Positive ion osmium (VIII) = Os⁺⁸D. Manganese (II) sulfide
Positive ion manganese (II) = Mn⁺²E. Platinum (IV) chloride
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cehgg suppose 14.0 g of ice at -10.0c is placed into 300.0 g of water in a 200.0-g copper calorimeter. the final temperature of the water and copper calorimeter is 18.0c. 1) what was the initial common temperature of the water and copper? (express your answer to three significant figures.)
The initial temperature of the water and copper is 22.51°C.
Mass of ice m = 14 g
We know, 1g = 0.001 kg
So, m= (14 x 0.001)kg = 0.014kg
Mass of water ml = 300g = (300 x 0.001)kg = 0.3kg
Mass of copper calorimeter m₂ = 200g = (200 × 0.001) kg = 0.21 kg
Specific heat of water s₁ = 4186 [tex]\frac{J}{kg . C}[/tex]
Specific heat of ice s₂ = 2100 [tex]\frac{J}{kg.C}[/tex]
Specific heat of copper s₃ = 387 [tex]\frac{J}{kg.C}[/tex]
Latent heat of fusion of water L = 3.33 x 10⁵ [tex]\frac{J}{kg}[/tex]
Initial temperature of ice T₁ = - 10°C
Initial temperature of water copper is T₂
Final temperature of the system is T = 18 °C
From equilibrium in heat
Heat gain by ice to become 0°C of ice +0°C of ice become 0 °C of water + 0°C of water become 18°C of water = heat loss by copper and water
ms₂ (0°-(-10°)) + mL + ms₁ (T -0°) = m₁s₁ (T₂-18°) + m₂s₃ (T2 - 18°)
∴ 0.014 × 2100 × 10 + 0.014 × 3.33 × 10⁵+ 0.014 × 4186 × 18 = 0.3 × 4186 × (T₂- 18 ) + 0.2 × 387 × ( T₂ -18 )
∴ 6010.87 = 1333.2(T₂ - 18)
∴ T₂ - 18 = 6010.87 / 1333.2 = 4.51
∴ T₂ = ( 18 + 4.51 )
∴ T₂ = 22.51° C
So, the initial temperature of the water and copper is 22.51°C.
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a 9.394mg sample of compound yielded 31.154 mg of carbon dioxide and 7.977 mg of water in combustion. calculate percent compositiobn of compound
%C = 90.5% and%H = 9.5%, You can determine by mass the amount of every element is contained in a compound using its percent composition.
Which is larger, mass or moles?Masses percent composition too is referred to as mass percent. The symbol for it is w/w%. A solution's mass percent is calculated by dividing the mass of each element present in one moles of the compound by the compound's molar mass and multiplying the result by 100%.
What do mass percent and composition percent mean?Despite their interchangeability, the phrases mass percent or percent composition are distinct. While the average concentration refers to a percentage of a certain chemical element inside a mixture, it weight percentage refers to the proportion of the a component in a combination.
Briefing:Mass of compound = 9.394 mg
Mass of CO2 yielded = 31.154 mg
Mass of H2O yielded = 7.977 mg
Molar mass of CO2 = 44.01 g/mol
Molar mass of H2O = 18.02 g/mol
mass of C = 7.08 × 10^-4 mol × 12.01 g/mol
mass of C = 0.0085 grams
mass of H = 8.86 × 10^-4 mol × 1.01 g/mol
mass of H = 0.000894 grams
Total mass of the compound = 0.0085 grams + 0.000894 grams = 0.009394 grams 9.394 mg
%C = (8.50 mg / 9.394 mg) x 100 = 90.5%
%H = (0.894 mg / 9.394 mg) x 100 = 9.5%
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g if 2 moles of al is stoichiometrically equivalent to 3 moles of h2, how many moles of hydrogen form from 6 moles of aluminum?
9 moles of [tex]H_{2}[/tex] can be made from complete reaction of 6 moles of Al with hydrogen chloride.
In chemistry, stoichiometry is the measurement of the ratios in which different substances or elements interact. The laws of conservation of mass and energy as well as the law of combining weights or volumes serve as the foundation for the rules used in the determination of stoichiometric relationships.
In the field of chemistry known as stoichiometry, needed quantitative data is ascertained by exploiting relationships between the reactants and/or products of a chemical process. Stoichiometry literally translates as the measure of elements because the Greek words stoikhein and metron both mean element and measure, respectively.
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draw the electron configuration for a neutral atom of cobalt
The electron configuration for a neutral atom of cobalt is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁷.
Cobalt [tex]Co \limits^{58.93}_{27}[/tex] have
Mass number = 58.93Atomic number = 27 Proton = electron = 27The electron configuration is the distribution of electrons from the lowest energy level according to the Aufbau principle. From the lowest energy level 1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁶, 5s², 4d¹⁰, ...
The numbers in the exponents indicate the maximum number of electrons that can holds.
₂₇ Co : 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁷
Before 3d, there were already 20 electrons, so in 3d there are only 7 left. 5 atoms are shown with up arrows and 2 down arrows because we must fill, up arrows first.
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(3 pts) The following is one Lewis structure for the SeO42- ion (selenate ion): Draw three ofthe resonance structures for this ion (there are more than three possibilities). '0: 0-Se-o: 'O:
In Lewis structure for the SeO42 all 32 of the valence electrons that make up the SeO42- ion are utilised in the sketch above.
When both protons are taken out of selenic acid, selenate, a divalent inorganic anion, is left behind. It serves as a metabolite for humans. It is a divalent inorganic anion and a selenium oxoanion. It is a hydrogen selenate's conjugate base. A highly simple illustration of the valence shell electrons in a molecule is called a Lewis structure or electron dot structure. It describes how the valence electrons are positioned around the various molecules' atoms. The valence shell electrons in a molecule are depicted in an extremely simplified manner by a Lewis Structure. It is used to demonstrate how the electrons in a molecule are positioned around particular atoms. When two atoms are bonded together, electrons are depicted as "dots" or as a line. The octet rule, which states that atoms share electrons so that each has eight in its outer shell, is the foundation of a Lewis structure. For instance, the outer shell of an oxygen atom has six electrons. The ion with the chemical formula SeO23 is referred to as selenite. It is the selenium oxyanion. It is the sulfite ion's selenium analog, SO23. As a result, selenium's oxidation state is assigned, and selenite is pyramidal.
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which is always higher for any given substance: the heat of fusion or the heat of vaporization? why?
The heat of vaporization is higher than the heat of fusion because the transformation from solid to liquid needs the breaking of a few bonds while changing liquid to gas requires the disruption of intermolecular forces and bonds.
What is the heat of fusion?The heat of fusion of a substance can be described as the change in its enthalpy by giving energy or heat, to a specific quantity of the substance to change from a solid to a liquid keeping pressure constant.
The heat of fusion can be measured by the amount of heat that requires to be introduced to change its crystalline fraction into the disordered state. The heat of fusion is uniquely dependent upon the degree of crystallinity and the theoretical heat of fusion which is 100% crystalline.
Latent heat of vaporization can be described as the heat consumed when matter disintegrates, changing state from liquid to gas state at a temperature.
The heat of vaporization can be described as characterized as the measure of heat expected to change 1 g of a liquid into a fume, without a change in the temperature of the liquid.
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consider a simple cubic (a.k.a, primitive cubic) unit cell as shown here.
Cubic Unit Cells. Eight atoms, which represent the real cube, define the simple cubic unit cell. Since they are corner atoms, each one only adds an eighth of an atom to the unit cell, giving us a total of just one net atom.
What is a primitive cubic cell?
Each simple cubic unit cell in the primitive cubic lattice (cP) has a total of one lattice point since there is one lattice point on each of the cube's four corners. The unit cell contains one atom overall (18 8), because each atom at a lattice point is subsequently distributed equally among eight neighbouring cubes.
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what kinds of forces hold ionic solids together? check all that apply. what kinds of forces hold ionic solids together?check all that apply. dipole-dipole forces metallic bonds hydrogen bonds electrostatic attraction dispersion forces covalent bonds
Electrostatic attraction hold ionic solids together.
What is Electrostatic attraction?
To understand the word ‘Electrostatic appeal’, we need to first revise the fundamentals of the Electrostatic area. It says that similar costs (like positive & tremendous) repel each other and distinct fees (like fine and negative) appeal to each other.
Electrostatic appeal is a force of enchantment which is exerted through two in contrast to or numerous (contrary) expenses on each different whilst they may be stored at some finite distance aside. That is additionally referred to as contactless appeal between contrary prices or we are able to say this Electrostatic pressure attracts distinct expenses with out touching them.
The concept of electrostatic pressure turns into clearer if we remember a sensible instance. If we convey North Pole of a magnet near to North Pole of another piece of magnet then those portions of magnet will repel every different and if we carry North Pole of one magnet close to the south pole of some other piece of magnet then they may entice to every other.
As we know those atom donate the electron gets positively charged and those atoms gains the electron gets negatively charged. The charge on the atoms are the responsible for the force in the ionic bond.
We know that force between two charge particle is known as electrostatics force. If charge particle is having same sign charge then it will be repulsive force and If charge particle is having opposite sign charge then it will be attraction force.
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this figure is an example of a(n) _____.
The picture depicts an organic complex made up of a molecule of glycerol and serves as an illustration of a saturated fat.
Explain what a molecule is?A molecule is the simplest unit of a material that keeps its content and properties. It is made up of two or maybe more atoms that are joined together by chemical bonds. Chemistry is built on molecules. The component symbol and a prefix indicating the amount of atoms are used to identify molecules.
Is oxygen an atom or a molecule?In nature, oxygen exists as a molecule. To create dioxygen, or O2, two oxygen atoms must make a solid double bond with one another. Typically, oxygen exists as a molecule. It has the name dioxygen.
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Which of the following has same valence electron as neon?a. carbon (C). b. phosphorus (P). c. nitrogen (N). d. oxygen (O)
Answer: option (b) phosphorus
Explanation: Valence electrons are the total number of electrons that an snippet can partake to form bonds.
Phosphorus is the element that has the same number of valence electrons as nitrogen with both of them having 5 valence electrons.
Carbon has a aggregate of 4 valence electrons.
Neon has a aggregate of 8 valence electrons.
Oxygen has a aggregate of 6 valence electrons
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in double replacement reactions, why will two metals not combine with each other when products are formed?
In double replacement reactions, the two metals will not combine with each other when products are formed because the atoms of metals contain less than half the full complement of electrons in their outermost shell.
What is Double replacement reaction?This is referred to as a type of reaction in which the positive and negative ions of two compounds exchange places to form two new products or substances.
The two metals will not combine with each other when products are formed because of their atoms having less than the required electrons which is needed to complement those in the outermost shell.
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determine the percent yield if 21.8g of k2co3 is produced from reacting 27.9g ko2 with 29.0l of co2
According to the given statement, the percent yield K₂CO₃ is 80.47 %is produced from reacting 27.9g ko2 with 29.0l of co2 .
What is K2CO3 used for?Potassium carbonate is widely used for the production of glass and soap. It is also used as a drying agent which is mild in nature. Many wine production processes involve the use of this compound as a buffering agent. Potassium carbonate is also used as a fire suppressant.
Briefing:Mass of = 27.9 g
Volume of = 29.0 L (At STP)
Molar mass of = 71.10 g/mole
Molar mass of = 44 g/mole
Molar mass of = 138.21 g/mole
Now we have to calculate the percent yield of K₂CO₃
% yield of K₂CO₃ =Actual yield of K₂CO₃ /Theoretical yield of K₂CO₃*100
= 21.8g/27.9g*100
=80.47%
Therefore, the percent yield of K₂CO₃ is, 80.47 %
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citric acid, the compound responsible for the sour taste of lemons, has the following elemental composition: cc, 37.51%%; hh, 4.20%%; oo, 58.29%%. calculate the empirical formula of citric acid.
The compound responsible for the sour taste of lemons, has the empirical formula C₆H₈O₇.
given that :
Carbon = 37.51 %
hydrogen = 4.20 %
oxygen = 58.29 %
moles of the carbon ,C = mass / molar mass
= 37.51 / 12
= 3.12 mol
moles of the hydrogen , H = 4.20 / 1
= 4.20 mol
moles of the oxygen , O = 58.29 / 16
= 3.64 mol
diving by the smallest one :
C = 3.12 / 3.12 = 1
H = 4.20 / 3.12 = 1.33
O = 58.29 / 3.12 = 1.17
by diving by the 6 we get : C₆H₈O₇
The empirical formula is C₆H₈O₇
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Part A What are the four quantum numbers for each of the two electrons in a 4s orbital? For first electron: n=4, l=3, ml=3, ms=+1/2 n=3, l=1, ml=0, ms=-1/2 n=1, l=0, ml=0, ms=-1/2 n=4, l=0, ml=0, ms=+1/2
For an electron in 4s orbital, the principal quantum number is 4, Azimuthal quantum number is 0, magnetic quantum number is 0 and spin quantum number is -1/2 or + 1/2.
There are four quantum numbers are used to describe completely the movement and trajectories of each electron within an atom. In atoms, there are a total of four quantum numbers. Principal quantum number n, designates the principal electron shell. The magnetic quantum number ml determines the number of orbitals and their orientation within a subshell. Electron spin quantum number designates the direction of the electron spin and may have a spin of +1/2. The orbital angular momentum quantum number determines the shape of an orbital, and therefore the angular distribution. The number of angular nodes is equal to the value of the angular momentum quantum number l.
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