Chromium (Cr) is a member of transition metals family, so the correct answer is E none of these.
What is transition metal?Usually transition metals are strong and hard elements. Both the melting and boiling points of these metals are high. Transitional metals family are versatile materials that can be hammered, bent, and drawn into wires. They also carry heat and electricity effectively. These metals' atoms have a strong attraction to one another. They are typically glossy as well.
The chemical element chromium has the atomic number 24 and the symbol Cr. It is the group 6's first element. It is a transition metal family that is steely-grey, glossy, tough, and brittle.
The great corrosion resistance and hardness of chromium metal make it valuable. The discovery that steel could be rendered extremely resistant to corrosion and discoloration by adding metallic chromium to make stainless steel was a significant advancement in the production of steel. 85% of commercial use is made up of stainless steel with chrome plating (electroplating with chromium). Chromium is highly prized for its ability to be finely polished while remaining tarnish-resistant. Nearly 70% of the visible spectrum and approximately 90% of infrared light are reflected by polished chromium.
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in which molecule do we find bond angles of 109.5o? group of answer choices xef4 ccl4 bf3 sf4 brcl5
Molecule in which we find bond angles of 109.5° is CCL4. The structure of CCL4 will be tetrahedral.
How many bonds does CCl4 has and what are some properties?There are four covalent bonds between the central carbon atom and four chlorine atoms for this compound
Carbon tetrachloride is an organic compound with the chemical formula CCl4 and is a colorless liquid with a sweet smell that can be detected even at low levels.
It is incombustible at lower temperatures. It was earlier widely used in fire extinguishers as a precursor to refrigerants and as cleaning agent, but has been phased out because of environmental and safety concerns.
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why does water mix quickly in some cases
It depends on which way the heat is moving. It takes longer for heat to go downwards forward towards a material below the hotter factor because heat moves upwards.
What actually is heat?The movement of minuscule atoms, molecules, or ion in solids, liquids, and gases produces heat energy. From one thing to another, heat energy could be exchanged. Heat is the flow or transfer that occurs as a result of the temperature differential between two objects.
What is heat explain with example?Amount of heat energy that moves from a hotter to a cooler thing, and temperature is simply how cold or hot an object is. When warmth of a coffee,
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SOLVED: Which statement correctly describes protons and neutrons ...
The charges of protons and neutrons are opposite and equal. Protons constitute positively charged particles, while electrons have a net negative charge. Neutrons are neutral particles found inside the nucleus.
what are Three electron-related facts:The exterior of the nucleus is surrounded by negatively charged electrons in orbit. It can be challenging for scientists to monitor them since they rotate so quickly. They are the tiniest particles in such an atom and are drawn to the protons' positive charges; one proton can hold 2000 of them.
Describe electrons and provide an example.The lowest and smallest component of an atom is an electron with a negative charge. An atom that is neutral has an equal number of protons and electrons. An atom of hydrogen, for example, contains just one proton and one electron. On the other hand, the atomic nucleus contains 92 protons and 92 electrons.
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classify each acid as strong or weak. if the acid is weak, write an expression for the acid ionization constant (ka). a. hf b. hcho2 c. h2so4 d. h2co3
The classification of each acid as strong or weak is as; (a) HF = weak acid, (b) HCHO₂ = weak acid, (c) H₂SO₄ = strong acid, and (d) H₂CO₃ = weak acid.
The strength and the Ka values for the given acids are as follows.
a) HF (weak acid).
Ka value of HF = 6.6 × 10⁻⁴
b) HCOOH (weak acid).
Ka value of HCOOH = 1.8 × 10⁻⁴
c) H₂SO₄ (strong acid).
Ka value of H₂SO₄ = 1.0 × 10³
d) H₂CO₃ (weak acid).
Ka value of H₂CO₃ = is 4.4 ×1 0⁻⁷
Expressions for acid ionization constant
a) Ka = [H⁺] [F⁻] / [HF]
b) Ka = [HCOO⁻] [H⁺] / [HCOOH]
c) Ka= [H⁺]² [SO₄⁻²] / [H₂SO₄]
d) Ka = [H⁺]² [CO₃⁻⁻] / [H₂CO₃]
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Which statements describe the electron sea model? Check all that apply.
The statements that describe the electron sea model are;
Electrons all have approximately the same energy.
Electrons move freely among atoms (delocalized).
What is the electron sea model?We know that there are several models that can be used for the determination of the movement of the electrons in the atom. In the electron sea model, we are saying that the electrons are quite free to move freely from one atom to the another and they are not attached to any particular atom.
We have to know that the electrons are known to occur in specific energy levels. The electrons must only be found in the energy level that corresponds to that particular electrons. This also means that the electrons that are in the electron sea must all be of the same energy.
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Missing parts;
Which statements describe the electron sea model? Check all that apply. Electrons all have approximately the same energy. Electrons move among orbitals of different energies. Electrons move freely among atoms (delocalized).
select reagents from the table to show how you would carry out this synthesis.
The total positive charge in the nucleus of any gas is the total number of protons times the total charge contained by one proton. The total number of protons depends on the type of gas, for example, hydrogen, oxygen, chlorine, etc. Each gas has a different number of protons in its nuclei.
To calculate the total positive charge in the atomic nuclei of any gas, find the total number of atoms in the gas. It can be calculated by multiplying Avogadro’s Number with the total amount of gas in moles. If the gas is available in molecules like , then it needs to be multiplied by 2 to calculate the correct number of atoms in the gas. The total number of protons needs to be calculated, which can be done by multiplying the atomic number of gas with the total number of atoms calculated before. Now we can calculate the charge by multiplying the charge on one proton by the total number of protons. A body that has more protons than electrons is said to have a positive charge. We are aware that electrons are negatively charged and protons are positively charged. Consequently, positively charged objects have more protons than electrons.
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Draw the most stable conformation of 3-isopropyl-1,1dimethylcyclohexane Please show me which one is the isopropyl and the dimethylcyclohexane and why is that the most stable conformation.
The most stable conformation of 3-isopropyl-1,1dimethylcyclohexane equatorial ethyl group (more stable). The stability of ethylcyclohexane's equatorial conformer exceeds that of its axial conformer by 7.4 kJ/mol.
According to the previous section, the chair conformation with the equatorial methyl group is more stable because it reduces steric repulsion, and as a result, the equilibrium favors the more stable conformer. Strongly favoring the equatorial shape is methylcyclohexane. The methyl group is in close proximity to the axial hydrogens in the axial conformation, which has an energetically unfavorable effect known as a 1,3-diaxial interaction. The methyl group prefers the equatorial shape as a result. The conformation of ethylcyclohexane in which the ethyl group is in the equatorial position is the most stable.
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find the calories lost by 50 g of hot water starting at 90 degrees celsius when mixed with 50 grams of cold water starting at 23 degrees celsius, and the final temperature of the mixture is 57 degrees.
The calories lost by 50 g of hot water starting at 90 degrees celsius is 265 cal.
Heat gained by cold water plus heat gained by the calorimeter equals the heat lost by hot water. The negative sign shows that the calorimeter and cold water are gaining heat, while the hot water calories is losing heat.
How many calories can be calculated from hot water?Water utilized has a mass of 50.0 g and a specific heat of 1.0 cal/g °C. The heat gained in calories will be provided by these figures. Q=m*C*T=50.0 g*1.0 cal/g°C*5.3 °C = 265 cal.
How do you calculate heat loss?U value x Wall area x Delta T is the formula used to calculate the amount of heat loss via a wall in BTUs. In our illustration, this would be: 07 x 164 x 28
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benzophenone ir spectrum
benzophenone ir spectrum C-H stretch (aromatics) at around 3000-3100, C=O strecth (ketone) at around 1700.
Diphenylmethanone is Benzophenone IUPAC name, and its molecular weight is 182.22 g/mol. It has two phenyl groups connected to the functional group ketone, which is present. The right-hand portion of benzene's infrared spectrum, with wavenumbers between 1500 and 400 cm-1, is regarded as the fingerprint region for identifying benzene and the majority of organic chemicals. The atoms of the benzene molecule's atoms have a special set of intricately overlapping vibrations that are to blame.
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Determine whether each of the following amino acids is polar, nonpolar, positively charged _ or negatively charged at pH 7 Polar and neutral Nonpolar Positively charged Negatively charged glutamate arginine Leu Gln hydrophobic amino acids CH OOC CHz- COO NH; HyC CoO NH; NH,
The polar and neutral, non-polar, positively and negative charged amino acids are as follows -
Gln is polar.
C4H6O4N, aspartate, glutamate, is negatively charged, C9H7O3N, arginine, lysine, is positively charged,
hydrophobic amino acids, leucine and C3H7O2N are non polar amino acids.
Amino acids are the compounds having carboxyl and amino terminal at each end. They fold together to form secondary structures such as alpha helix, beta sheets and others. Upon more folding and turning they acquire three and four dimensional structure which imparts functional activity to the proteins.
Amino acids can be polar, non-polar, postively or negatively charged. The net ionic charge decides their postively or negatively charge. Also, aliphatic groups make the amino acids non-polar while presence of oxygen, sulphur, nitrogen gives polar character.
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The complete question is attached in figure.
what type of intermolecular force is found between a) f2 and cl2 ? London dispersion force b) water molecules ? hydrogen bonds ?
London dispersion forces are the only intermolecular forces that exist between fluorine and chlorine because they are both non-polar covalent compounds.
What produces the dispersion forces in London?The coulombic interaction between instantaneous dipoles lead to London dispersion forces.All molecules (and atoms) exhibit dispersion forces, which are typically higher for heavier, more polarizable, and molecules with wider area areas.
By London forces, what do you mean?The intermolecular forces or attraction that hold molecules together are known as London forces.Although they are a vander waal's force, they are the only one found in substances without polar dipole molecules.
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light of wavelength 121.6 nm is emitted by a hydrogen atom. what are the (a) higher quantum number and (b) lower quantum number of the transition producing this emission? (c) what is the name of the series that includes the transition?
(a) higher quantum number , n2 = 2
(b) lower quantum number of the transition producing this emission, n1 = 1
(c) the name of the series that includes the transition, n = 2 to n = 1
Given that :
wavelength of light = 121.6 nm
wave number = 1 / λ
= 1 / 121.6 × 10⁻⁹ m
= 8.22 × 10⁶ m⁻¹
the Rydberg equation is given as :
1 / λ = R ( 1 / n1² - 1 / n2² )
n1 =
n2 = 2, 3, 4...
1 / λ = R ( 1 / n1² - 1 / n2² )
1 / λ = 1.097 × 10⁷ ( 1 / 1 - 1 / 2² )
1 / λ = 8.22 × 10⁶ m⁻¹
it is clear from the above equation , n1 = 1 and n2 = 2
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What are two qualities of metals? Describe each
Answer:Typical physical properties of metals : high melting points. good conductors of electricity. good conductors of heat.
Explanation:
a chemist wants to make 3.3 l of a 0.118 m kcl solution. how much kcl in grams should the chemist use?
To create 3.3 l of a 0.118 m potassium chloride solution, the chemist needs to use 29g of kcl (KCl). Potassium chloride is a salt that has a metal-halogen link in it.
It is a salt with the chemical symbol KCl and a 1:1 composition of potassium cations and chloride anions. It has an odourless scent and a look that is colourless and crystalline. A compound or material can be halogenated through a chemical reaction in which one or more halogens are added.
potassium chlorides molarity is 0.118M.
3.3 L is the volume.
Considering that molarity(M) = mole/volume
KCL mole = 0.118*3.3
= 0.3894 mole
KCL's mass equals 0.894 * 74.55
KCL mass = 29g
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How many electron pairs does carbon share in order to complete its valence shell? 8 1 4 3 2
Carbon shares four pairs of electrons to complete its valence shell (option C).
Based on the electron configuration, the carbon atom has 4 valence electrons or 4 electrons in its outermost shell. It is the presence of these valence electrons that play an important role in forming chemical bonds. Every atom is capable of forming a stable, including the carbon atom.
To achieve stability, this atom needs another 4 electrons by forming covalent bonds. Only the carbon atom is capable of forming 4 covalent bonds to reach the octet state.
The carbon atom (C ) has a unique characteristic with an atomic number of 6 electron configurations, namely the ability to form long C chains. Atom C has 4 valence electrons, which can be covalently bonded with similar atoms or other atoms.
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lead crystallizes in a face-centered cubic unit cell with an edge length of 495.08 pm. calculate the density of the metal.
The density of the metal with an edge length of 495.08pm is 549.06pm
Lead crystallizes with FCC lattice, Z = 4
√2a = 4r
r = 175.01pm
The density is given as:-
D=ZM/N0(a3) =5.616
Edge length a=404.91pm
For a BCC lattice, the 3D diagonal (l) and edge length (a) is related as:-
l=√3al=1.732×317=549.06pm
The density (d) of a crystal depends on the number of atoms occupying each unit cell, the mass of each atom (m), and the edge length of the unit cell (a). There are three types of cubic lattices,
1. Simple Cubic
2. Body centered
3. Face centered
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hydrochloride acid is used to extract oil from the ground. if the electronegativity of H is 2.20 and of Cl is 3.55, which type of bond is formed between H and Cl, when they form hydrogen chloride
Acidifying an oil well.When hydrochloric acid is injected into the rock formations in oil wells, it acts as a stimulant in the oil production process.In HClHCl, the hydrogen and chlorine atoms are bound by a polar covalent link.It is produced when two atoms share an electron pair.
Are H and Cl covalent or ionic?One bond is created by combining only one valence electron of chlorine and only one valence electron of hydrogen.Consequently, electrons are shared between parties.HCl is hence covalent.
Does H have a polar connection with Cl?For instance:In the H-Cl molecule, the connection between H and Cl is polar.Because hydrogen & chlorine have the same pair of electrons, though not equally, the connection is polar.Hydrogen only has a 0.16 electronegativity compared to the 3.16 electronegativity of chlorine.
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if the half-life of a radioactive element is 18 days, what percentage of the original sample would be left after 108 days?
First-order kinetics governs the nuclear decay of the sample's original mass of 25,0 g. Percentage of original sample remained after 108 days is 1.5625%
What exactly does nuclear decay mean?An fragile atomic nucleus produces subatomic particles on its own through a number of different processes known as radioactive decay. It is said that a daughter nucleus is created when the parent nucleus decays.
Given;
t 1/2 = 18 days;
t = 108 days;
Amount of remaining radioactive element
R = , where n =
⇒n= 108/18
n= 6;
= 0.015625
⇒ Percentage of original sample remained , × 100 = 1.5625 %
Half life Of Radioactive Element is 18 days
Percentage of original sample remained after 108 days is 1.5625%
Why do nuclear atoms decay?Whenever a reduced nuclear configuration to that they can transition is present, atoms radioactively decay. The real decay of a single atom occurs at random and is not due to the atom aging or changing over time.
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What is the structure of 2-ethyl-3-hexyne?
The structure of 2-ethyl-3-hexyne
H3C–CH2–CH2–CH2–C2H5–CH2–CH2–CH2–CH3
2-Ethyl-3-hexyne is an alkene with the chemical formula C7H12. It has a single carbon-carbon double bond, located between the second and third carbon atoms. The rest of the molecule consists of two ethyl groups (C2H5) attached to the first and fourth carbon atoms, and five methyl groups (CH3) attached to the third through seventh carbon atoms. The compound has a total of twelve hydrogen atoms attached to its carbon atoms. Its structure can be written as follows:
H3C–CH2–CH2–CH2–C2H5–CH2–CH2–CH2–CH3
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write the ion (atom) that has 10 electrons and has lost 3 electrons.
The ion that has 10 electrons and lost 3 electrons is aluminum (Al³⁺).
An atom or molecule with a net electrical charge is known as an "ion." Conventionally, the electron charge is negative. This charge is equal to and opposite to the proton charge, which is positive.
Given that the ion has approximately 10 + 3 = 13 electrons, this is the number of electrons, which is equal to the number of protons. The number of protons is the element's atomic number.
Looking through the periodic table, find the element that has an atomic number of 13. We have found it to be aluminum (Al). Its ion form is written as Al³⁺. To form an ion, aluminum loses three electrons. As a result, it carries a 3+ charge.
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order each of the sets of compounds with respect to sn2 reactivity (1 = fastest).
In set 1 Thus the order of reactivity is C > B > A. in set 2Thus the order of reactivity is C > A > B.order each of the sets of compounds with respect to sn2 reactivity.
In Set 1 all the compounds have same carbon skeleton. Thus the difference in reactivity of the substrates is due to difference in the leaving groups. A substrate with a better leaving group is a better substrate for SN2 reaction when the carbon skeleton is identical. The order of the leaving group character is OTs > Br > OH. Thus the order of reactivity is C > B > A. In Set 2 all the compounds have same leaving group. Thus the difference in reactivity of the substrates is due to difference in the carbon skeletons. A substrate with an easily accesible carbon skeleton is a better substrate for SN2 reaction when the leaving group is identical. The order of the reactivity of alkyl halides towards SN2 reaction is Methyl > 1o > 2o > 3o. Thus the order of reactivity is C > A > B.
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Question 16 (3 points) What is the oxidation state of thc phosphorus (P) atom the compound that has the forula P4O6? OA+1 B) +2 Oc +3 D) +4
The oxidation state of phosphorus in the compound P₄O₆ is +3.
In order to find the oxidation state of phosphorus in the compound P₄O₆,
we can assume the oxidation state of phosphorus to be X.
Now, we know, the oxidation state of oxygen atom is +2.
The net charge on the compound is 0.
So, we can write the formula as,
4X + 6(-2) = 0
Now, solving further,
4X = 12
X = 3
So, we got the value of X to be +3, Hence the oxidation state of phosphorus in this compound is +3.
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Draw Lewis structures and condensed structural formulas for the four alcohols with the molecular formula C4H10O. Classify each alcohol as primary, secondary, or tertiary.
The Lewis structures for the four alcohols with the molecular formula of C4H10O are represented in the diagram below. There are 2 primary, 1 secondary, and 1 tertiary alcohol.
What is alcohol?
Any organic molecule comprising a hydroxyl group(-OH) bound to a saturated carbon atom is generally called an alcohol. Depending upon the structure, alcohols are classified into primary alcohol, secondary alcohol, and tertiary alcohol. Alcohols are primarily colorless and have a distinct sweet smell to them. Ethanol is a primary alcohol that is used for consumption while Methanol is used in woodworking and various other industrial requirements.
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which indoor air pollutant causes the most cancer in developed countries? group of answer choices carbon monoxide naphthalene benzene formaldehyde radioactive radon gas
Radioactive radon gas, indoor air pollutant causes the most cancer in developed countries.
Radon gas is a chemical element with the number 86 and symbol Rn. It is a radioactive noble gas that is tasteless, odorless, and colorless. It is a minor part of the normal radioactive decay chains that naturally occur as lead and a number of other short-lived radioactive elements are produced as thorium and uranium slowly decay. Radon is the first result of radium breakdown. With a half-life of only 3.8 days, its most stable isotope, 222Rn, is also one of the rarest elements. The fact that uranium and thorium are two of the most common radioactive elements on Earth and have three isotopes each with a half-life means that even though radon has a short half-life, it will continue to exist on Earth for a very long period. Contrary to all the other intermediate components in the aforementioned decay chains, radon is gaseous and risky to breathe in under normal circumstances. Despite usually making up the bulk of a person's background radiation dosage, the amount of radon gas exposure varies depending on the local geology. Earth minerals that contain uranium are a typical source, therefore it frequently gathers in underground spaces like basements.
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Two lewis structures can be drawn for the molecule formamide HCONH2, with the true structure being a resonance hybrid of the two. Draw both Lewis Structures, then propose a bonding scheme for the resonance hybrid. Explain why the C-N bond doesn't rotate freely.
When a single Lewis structure is insufficient to properly explain the bonding, resonance structures are used. A resonance hybrid, which depicts the total delocalization of electrons inside the molecule, is defined as the mixture of possible resonance structures.
As shown in the diagram below, resonance delocalization limits rotation around the C-N bond in the peptide bond. The carbonyl group's lone pairs on nitrogen can be delocalized, giving the C-N bond a partial double bond structure. Rotation is hampered by this double bond nature.
Can CN bonds rotate freely?Most carbon-carbon single bonds have an energy barrier that prevents rotation, which is typically in the range of 3-5 kcal/mol. These connections can freely rotate due to the low barrier.
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a) Draw Lewis structures for: CH2NH, HCN, CH3NH2, [HN(CH)NH]- . One of them needs 2 resonance structures.
b) Rank them in order of decreasing CN bond length.
The nitrogen and oxygen atoms stimulated the resonance structure of the carbon atom, which caused the carbon atom to exhibit positive electricity while concurrently exhibiting negative electricity in the nitrogen and oxygen atoms.
What is the CH3NH2's structural geometry?
Tetrahedral is the shape of the C and N atoms in the CH#NH2 molecule. The geometry of CH3NH2 is hence tetrahedral.
Are there polar bonds in CH3NH2?
(a) Both the covalent molecules CH3NH2 and CH3F have polar links. While the dipole in CH3F cannot H-bond, that in CH3NH2 can. As a result, CH3NH2 interacts more strongly and has a higher boiling point. (c) Although CH3OH and CH3CH2OH may both form hydrogen bonds, CH3CH2OH has more CH bonds, resulting in stronger interactions between dispersion force.
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You are going to carry out a chemical reaction in which you need 16 g of oxygen for every 7.0 g of
nitrogen that will be used. If you have 0.554 kg of oxygen, how many milligrams of nitrogen do you
need?
Answer: To solve this problem, we can use the given information to set up a proportion. The ratio of oxygen to nitrogen in the reaction is 16 g : 7.0 g, or 8 : 3.5. We can set up a proportion using these ratios as follows:
(3.5) x = (8) 0.554 kg
We can solve this proportion by cross multiplying to find the value of x, which is the amount of nitrogen needed:
3.5 * 0.554 kg = 8 * x
1.947 kg = 8 * x
x = 0.24125 kg
We can convert this value to milligrams by multiplying it by 1,000,000:
x = 0.24125 kg * 1,000,000 mg/kg
= 241,250 mg
Therefore, the amount of nitrogen needed for the chemical reaction is approximately 241,250 milligrams.
n this experiment, two equivalents of benzaldehyde were used, and the desired product was dibenzylideneacetone. how can you use the attached proton nmr of the product to show that you did not isolate the product of a single aldol condensation (that is, benzylideneacetone).
The two equivalents of benzaldehyde were used, and the desired product was dibenzalacetone has the proton NMR signal is 5 signals.
The reaction of the two equivalents of benzaldehyde with the acetone show the aldol condensation and form the product is dibenzalacetone.
the dibenzalacetone shows the following proton NMR signals:
proton a : 7.1 ppm , doublet = 1 proton
proton b : 7.8 ppm doublet = 1 proton
proton c : 7.5 ppm doublet = 2 protons
proton d : 7.4 ppm is the multiplet = 2 protons
proton e : 7.3 ppm multiplet
The chemical shifts are based on the protons chemical environment. the coupling constant is 12 Hz for the olefinic hydrogens.
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A scientist measures the standard enthalpy change for the following reaction to be -14.1 kJ: 3Fe2O3(s) + H2(g)2Fe3O4(s) + H2O(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of H2O(g) is kJ/mol.
b. A scientist measures the standard enthalpy change for the following reaction to be -582.2 kJ : H2CO(g) + O2(g)CO2(g) + H2O(l) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of CO2(g) is kJ/mol.
(a)The standard enthalpy of formation of H2O(g) is -249.3 kJ/mol
(b)The standard enthalpy of formation of CO2 is -187.25 kJ/mol
ΔHrxn = ΔHf(products) - ΔHf(reactants)
(a) Standard enthalpy of formation of the following is:-
Fe2O3(s) = -824 kJ/mol
H2(g) = 0 kJ/mol
Fe3O4(s) = -1118.4 kJ/mol
H2O(g)= Let it be x kJ/mol
Putting these values in the given equations, we get:-
-14.1 = [ 2(-1118.4) + 1(x) ] - [ 3(-824) + 1(0) ]
-14.1 = (-2236.8 + x) - (-2472)
-14.1 = -2236.8 + x + 2472
-14.1 = x + 235.2
x = -14.1- 235.2
x = -249.3
Hence, standard enthalpy of formation of H20(g) is -249.3 kJ/mol
(b) Standard enthalpy of formation of the following is:-
H2CO(g) = -109.15 kJ/mol
02(g) = 0
CO2(g) = Let it be x kJ/mol
H2O(l) = −285.8 kJ/mol
Putting these values in the given equations, we get:-
-582.2 = [ 1(x) + 1(−285.8) ] - [ 1(-109.15) + 1(0) ]
-582.2 = x −285.8 + 109.15
x = -582.2 + 285.8 + 109.15
x = -187.25
Hence, standard enthalpy of formation of CO2 is -187.25 kJ/mol
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Hydrogen isocyanide (HNC) has the same elemental composition as hydrogen cyanide (HCN), but the H in HNC is bonded to the nitrogen atom. Draw a Lewis structure for HNC, and assign formal charges to each atom. How do the formal charges on the atoms differ in the Lewis structures for HCN and HNC?
Hydrogen isocyanide (HNC) has the same elemental composition as hydrogen cyanide (HCN), but the H in HNC is bonded to the nitrogen atom. Formal charges to each atom is same, The charge on an atom in a compound is known as the formal charge.
Each atom is made up of a nucleus and one or more electrons that are linked to it. One or more protons and a significant number of neutrons make up the nucleus. Only the most prevalent type of hydrogen is neutron-free. Atoms that are neutral or ionized make up every solid, liquid, gas, and form of plasma. Atoms are incredibly tiny, measuring typically 100 picometers across. Due to quantum effects, they are so small that it is impossible to predict their behavior with sufficient accuracy using classical physics, as would be the case, for example, if they were tennis balls. The nucleus of an atom contains more than 99.94% of its mass. The electric charges of the protons are positive, those of the electrons are negative, and those of the neutrons are zero. The atom is electrically neutral if the number of protons and electrons is equal. An atom has an overall charge of positive or negative if it contains more electrons than protons; these atoms are known as ions. The electromagnetic force pulls an atom's electrons toward the protons in its atomic nucleus. The nuclear force draws the protons and neutrons in the nucleus together. The electromagnetic force that keeps positively charged protons apart is typically weaker than this force.
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Answer:
Answer : The correct Lewis-dot diagram is shown below.
Explanation:
Explanation :
Lewis-dot structure : Lewis-dot structure shows the bonding between the atoms of a molecule. Lewis-dot structure also shows the unpaired electrons present in the molecule. In the Lewis-dot structure, the dot represent the number of valence electrons.
The given molecule is, Hydrogen cyanide (HCN)
As we know that carbon has '4' valence electrons, hydrogen has '1' valence electron and nitrogen has '5' valence electrons.
Therefore, the total number of valence electrons in hydrogen cyanide, = 1 + 4 + 5 = 10
According to Lewis-dot structure, there are 10 number of bonding electrons and 0 number of non-bonding electrons.
The Lewis-dot structure of hydrogen cyanide (HCN) is shown below.
