2 – C2H6 and HCN O 4 contain at least one pi bond.
What is molecules?Molecules are the smallest unit of any chemical element or compound that has the properties of that substance. They are made up of atoms bonded together in various combinations, and have a definite chemical structure and composition. Molecules can be made up of single atoms, such as oxygen (O2), or of different types of atoms, such as water (H2O). Molecules are the building blocks of all matter, and are the basis of all living and non-living things.
C2Cl4 and Cl2CO do not contain any pi bonds. Pi bonds are formed by the overlap of atomic orbitals between two atoms. C2H6 and HCN O 4 contain double bonds between the atoms, which are made up of pi bonds. C2Cl4 and Cl2CO do not have any double bonds, so they do not contain any pi bonds.
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Determine the average rate of change of B from t=0 s to t=402 s.
A ---> 2B
Time: Concentrations of A:
0 0.710
201 0.430
402 0.150
the average rate of change of B from t=0 s to t=402 s. A ---> 2B with
Time: Concentrations of A: 0 0.710, 201 0.430, 402 0.150 is 0.07%
To determine the average rate of change of B from t=0 s to t=402 s, we need to find the change in concentration of B (delta B) and divide it by the change in time (delta t). From t=0 s to t=201 s, the concentration of A changes from 0.710 to 0.430. Since the reaction is A ---> 2B, we can assume that the concentration of B doubles the concentration of A. So, the concentration of B changes from 0.710/2 = 0.355 to 0.430/2 = 0.215.The change in concentration of B is 0.215 - 0.355 = -0.140
From t=201 s to t=402 s, the concentration of A changes from 0.430 to 0.150. Using the same assumption, the concentration of B changes from 0.215 to 0.150/2 = 0.075. The change in concentration of B is 0.075 - 0.215 = -0.140 The total change in concentration of B is the sum of the two changes, which is -0.140 + (-0.140) = -0.280. The total change in time is 402s - 0s = 402sTherefore, the average rate of change of B is -0.280 / 402s = -0.000696, or -0.07% (two significant figures)
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Which cubic crystal has the most efficient arrangement of spheres?
simple cubic
O body-centered cubic
O face-centered cubic
ws.
O tetragonal cubic
The body-centered cubic structure has the most efficient arrangement of spheres.
What is the best configuration of spheres?The best way to arrange spheres is in proximity to one another. A metal crystal's atoms are grouped in what is known as close-packed formations, which are comparable patterns. The following diagram illustrates the various closely packed forms that pure metals can adopt. These three closest packing configurations are those that the majority of pure metals naturally use.
Which unit cell packs more efficiently, the basic cubic or the body-centered cubic?Simple cubic and body-centered cubic lattices have packing efficiency of 52.4% and 68%, respectively.
What are the fcc, bcc, and basic cubic packing efficiencies?Both of these fill 74% of the available space according to their 74% packing efficiency. The packing efficiency of a body-centered cubic lattice, or bcc, is 68% while that of a simple cubic lattice is 52.4%.
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Translate the sawhorse projection below into a wedge-and-dashed bond Cram projection.
The sawhorse projection of the molecule below can be translated into a wedge-and-dashed Cram projection by rotating the molecule 90 degrees so that the hydrogen atoms are on the left and the oxygen atom is on the right.
What is projection?Projection is a method of displaying data or information in a visual format, such as a graph, chart, map, or diagram. It is used to display relationships between two or more variables, such as a change in population over time. It can also be used to show the relationship between multiple variables, such as the correlation between unemployment and poverty. Projection is an important tool for data analysis and decision making, as it provides a visual representation of data that is easier to interpret than tables and equations.
Then, the bonds between the carbon and hydrogen atoms are represented by wedges, while the double bond between the carbon and oxygen atoms is represented by a dashed line. This results in the following Cram projection:
H3C-O-C-H2.
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classify the each of the following statements about the octet rule as true or false.
TRUE OR FALSE
According to the octet rule, atoms frequently attempt to have the same electron configuration as the nearby noble gas.
Due to the fact that all orbitals will be filled, an entire octet is exceedingly stable. A process that increases the stability of the atoms will release energy in the form of heat or light because more stable atoms have less energy. When there are eight electrons surrounding the atom, the arrangement is stable. The valence electrons in an atom can be gained or lost to make an octet; atoms have eight valence electrons; and elements in group 1A of the periodic table lose one electron to form an octet. These claims concerning the octet rule are correct.
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complete question: Classify each of the following statements about the octet rule as true or false.
1. Atoms with eight valence electrons follow the octet rule
2. Only atoms with exactly eight electrons follow the octet rule
3. Atoms will gain or lose valence electrons to obtain an octet
4. All of the elements in group 8A of the periodic table obey the octet rule
5. Elements in group 1A of the periodic table will lose one electron to form an octet
6. Elements in group 1A will gain one electron to form an octet
draw the structures of ethane, ethene, and ethyne. show all hydrogen atoms.
The structures of ethane, ethene, and ethyne. show all hydrogen atoms is given below.
What is Ethane?Ethane is a hydrocarbon molecule with the chemical formula C2H6. It is composed of two carbon atoms joined by a single covalent bond and six hydrogen atoms bound to the carbons. The structural formula of ethane is shown below. All six hydrogen atoms are explicitly shown.
Ethene
Ethene is a hydrocarbon molecule with the chemical formula C2H4. It is composed of two carbon atoms joined by a double covalent bond and four hydrogen atoms bound to the carbons. The structural formula of ethene is shown below. All four hydrogen atoms are explicitly shown.
Ethyne
Ethyne is a hydrocarbon molecule with the chemical formula C2H2. It is composed of two carbon atoms joined by a triple covalent bond and two hydrogen atoms bound to the carbons. The structural formula of ethyne is shown below. Both hydrogen atoms are explicitly shown.
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A phosphorus compound that contains 34.00% phosphorus by mass has the formula X3 P2
The equation for the phosphorus by mass of the compound with the chemical formula of X3P2 is:%Phosphorus=2×(MolarMassofPhosphorus)/MolarMassofthecompound×100.
A phosphorus compound?Given in this issue is a phosphorus compound with a mass percentage of 34.0 percent phosphorus and the formula x, 3 p 2. Now that x must be identified, the formula is x, 3, p, 2.
There are two phosphorus atoms present, and their combined mass will be 31.0 grammes per mole. That equates to 62.0 g/mol. Given in this issue is a phosphorus compound with a mass percentage of 34.0 percent phosphorus and the formula x, 3 p 2.
Now that x must be identified, the formula is x, 3, p, 2. There are two phosphorus atoms present, and their combined mass will be 31.0 grammes per mole. That equates to 62.0 g/mol.
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Which of the following Nitrogen Oxides have the same empirical formula? a)N2O5 b)NO c)N2O d)N2O4 e)NO2
N2O5 Nitrogen Oxide have the same empirical formula. The simplest whole number ratio of atoms present in a substance is its empirical formula in chemistry.
What is empirical formula?The simplest whole number ratio of atoms present in a substance is its empirical formula in chemistry. The empirical formula of sulphur monoxide, abbreviated SO, and disulfur dioxide, abbreviated S2O2, are two straightforward examples of this idea. The empirical formula is the most straightforward formula for a compound and is defined as the ratio of subscripts of the smallest whole number of the formula's constituent elements. It is referred to as the simplest formula as well. We can determine the relative atomic ratios in a compound using an empirical formula. The ratios also hold true at the molar level.The empirical formula is typically applied to simply display the atoms that make up a molecule. This is helpful if you want to quickly identify the elements you're working with. When determining the number of atoms in a chemical, the molecular formula is most helpful.
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Draw the three-dimensional representation for the R enantiomer of the molecule shown below.
The three-dimensional representation for the R enantiomer of the molecule shown below:
What is R enantiomer?An enantiomer is one of two stereoisomers that are not superposable onto their own mirror image in chemistry. It is also known as an optical isomer, antipode, or optical antipode. Enantiomers, like one's right and left hands, cannot be superposed on one other when staring at the same face. The chiral compound's enantiomers are named using the "right hand" and "left hand" nomenclature. The stereocenters are denoted by the letters R or S. Consider the first image: a curved arrow is drawn from the most important (1) substituent to the least important (4) substituent.
Here,
The following is a three-dimensional depiction of the molecule's R enantiomer:
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Which of these is a speed?
A
50 miles
B 50 hours
c 50 miles per hour
D 50 hours per mile
Answer:
c 50 miles per hour
Explanation:
i hope that this is correct
How many atoms are in 17.1 grams of LiCl?
17.1 grams of LiCl is equal to 0.6 moles of LiCl.
What is ionic compound?An ionic compound is a chemical compound composed of ions held together by electrostatic forces termed ionic bonding. It is a type of chemical bond that generates two oppositely charged ions, typically a cation (positive ion) and an anion (negative ion). In other words, ionic compounds are formed when a metal and a non-metal react to form a salt. Examples of ionic compounds include table salt (NaCl), baking soda (NaHCO3), and calcium chloride (CaCl2).
Since LiCl is an ionic compound, it is composed of both Li+ and Cl- ions. Each mole of LiCl contains 6.023 x 1023 formula units, which is the same as 6.023 x 1023 atoms. Therefore, 17.1 grams of LiCl contains 3.61 x 1024 atoms of Li+ and 3.61 x 1024 atoms of Cl-.
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Predict the number of signals and their multiplicity in the 1H-NMR spectra of the following compounds.
(i) ClCH2CH2CH2Cl (ii) ii)CH3CH2COOCH(CH3)2
I ClCH2CH2CH2Cl (c)
Such a demonstration is possible. ClーCH2ーCH2ーCH2ーClThe structural formula of the supplied compound's carbon atoms is marked as C-1, C-2, and C-3 on the left side.The carbon atom C-2 is seen to have a plane of symmetry there.The hydrogen (H) atoms connected to C-1 and C-3 are hence equivalent. Additionally, the hydrogen (H) atom connected to the C-2 carbon atom has a distinct chemical environment than the C-1 and C-3 carbon atoms.Thereby,
In the specified compound, there are three equivalent sets of protons. In the 1H-NMR spectrum, three signals have been identified.The (n+1) rule, where n is the number of hydrogen atoms bonded to a neighbouring carbon atom, is used to calculate the multiplicity of the three signals as follows:
1. There are n+1 H atoms connected to the C-1 carbon atom.Here, n =2 (because the nearby carbon (C-2) atom contains two H-atoms)So, (2+1) = 3 (signal shows as a triplet) (signal appears as a triplet)Similarly,2. H is bonded to carbon atom C-2 in multiples of (4+1) = 5. (appears as a quintet)3. The H atoms linked to the C-3 carbon atom have a multiplicity of (2+1) = 3. (appears as a triplet)CH3CH2COOCH(CH3)2
It may appear as:
CH3ーCH2ーCOーOーCHー(CH3)2
On the right side of the structural formula, the two -CH3 groups connected to the -CH group are in the same chemical environment. This makes the hydrogen (H) atoms in the two (-CH3) groups equal. 6 protons will thus produce a single signal in 1H-NMR.In the 1H-NMR spectrum, the H atom in the -CH group (carbon atom single bonded to the O atom) on the right side of the structural formula produces one signal.On the left side of the structural formula, the 2 H atoms in the -CH2 group joined to the C=O group produce 1 signal in the 1H-NMR spectrum.The given compound contains a total of 4 equivalent protons. Consequently, the 1H-NMR spectrum shows 4 signals.
The (n+1) rule, as given in the above part I is once more used to calculate the multiplicity of the four signals.
1. The number of 6 H molecules in the two CH3 groups is equal to n+1.
n= 1 (just 1 H is present on the next carbon that is, -CH group) (only 1 H is present on the adjacent carbon that is, -CH group)In other words, the multiplicity of 6 H = 1+1 = 2 (signal appears as a doublet)Similarly,2. 1H on the CH group has a multiplicity of 6+1 = 7. (signal appears as a septet)3. 2H's multiplicity on the CH2 group equals 3+1 = 4. (A quartet represents signal.)The multiplicity of 3H on the CH3 group = 2+1 =3 (signal appears as a triplet)To learn more about compound refer to:
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did radicals take control in russian revolution
One of the main political groups at the Petrograd soviet was the Bolsheviks. They were led by Vladimir Lenin, and they believed that the future Russian government should be a Socialist (communist) one.
What do you mean by radical?In chemistry, a molecule with at least on electron is referred to as a radical, sometimes known as a free radical. The majority of molecules have an even variety of electrons, and indeed the c - c single bonds that hold the atoms in a molecule together often comprise of a pair of electrons that the atoms in the bond share.
An extremist is where?A radical is an arithmetic expression that is indicated by the major sign, such as an original number, as you may remember. A radical function is an equation with the independent variable (typically x) acting as the radicand. Radical calculations with either a square root as both the radical are frequently described using square root functions.
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What Volume of 25% (w/v) solution HNO3?
To find the volume of 25% (w/v) solution HNO3, you need to know the mass of HNO3 and the total volume of the solution.
What do you mean by volume?
Volume is a measure of the amount of space taken up by a three-dimensional object or substance. It is commonly used to measure the amount of a liquid, gas, or solid. In chemistry, volume is usually expressed in units such as liters (L), milliliters (mL), cubic centimeters (cm3), or milligrams (mg).
For example, if the total volume of the solution is 100 mL and the mass of HNO3 is 25 g, then the volume of 25% (w/v) solution HNO3 is 25 mL.
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A ddNTP, used often in DNA sequencing, lacks a(n) ________ at the ________ and ________ carbons. H; 2'; 3' methyl; 2'; 3' OH; 2'; 5' carboxyl; 5'; 3' None of the listed answers is correct
A DdNTP, used often in DNA sequencing, lacks a(n) OH at the 2' and 3' carbons. Dideoxynucleosides (DdNTP) are chain-elongating inhibitors of DNA polymerase, that are used in Sanger method for DNA sequencing.
What is DdNTP?DdNTP are also known as 2',3' because both 2' and 3' positions on the ribose lack hydroxyl groups.
DdNTP is used in Sanger sequencing, which is also known as chain-termination sequencing. In Sanger sequencing method, DdNTP is used as a substance to stop synthesis of DNA because of its lack of free hydroxyl group needed for the replication of DNA. DdNTPs are mostly dyed to help in the DNA sequence analysis.
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Complete the table of electron-group arrangements, molecular shapes and bond angles
Dichloromethane is the chemical name for this substance. Nitrous oxide is the name given to this chemical. Sulfur trioxide is the chemical formula for this substance.
What is electron-group arrangements?The three-dimensional arrangement of atoms in a molecule is known as electron group geometry. A molecule's geometry is a significant feature that influences the physical and chemical characteristics of a substance. Thus, the "Electron Group" geometry of each center atom in a structure may be established simply by counting the number of "groups" of electrons surrounding the atom and then imagining how those groups would organize themselves to be as far apart as feasible. Any sort of bond—single, double, or triple—and lone electron pairs are the two types of electron groups. The initial step in applying VSEPR to simple molecules is to count the number of electron groups surrounding the core atom. Keep in mind that a multiple bond only counts as one electron group.
Here,
a). SO₃
This compound is known as sulfur trioxide.
The molecular shape of sulfur trioxide is trigonal planer.
And the bond angle is 120°.
b). N₂O
This compound is known as Nitrous oxide. Here, nitrogen is in the center. There is no lone pair around the nitrogen atom and it forms two sigma bonds with the other two atoms.
It is linear in shape.
The bond angle between them is 180°.
c). CH₂Cl₂
This compound is known as the Dichloromethane
The molecular shape of the compound is tetrahedral.
The bond angles is 120°
This compound is known as the Dichloromethane. This compound is known as Nitrous oxide. This compound is known as sulfur trioxide.
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Balance the equation below
Answer: [tex]K_{2}[/tex]O + [tex]H_{2}[/tex]O --> 2KOH
Explanation: To balance a chemical equation the atoms of an element on product side is equal to reactant side.
Balance each redox reaction in basic solution using the half reaction method. O2 + Cr3+ → H2O2 + Cr2O7^2-
The final balanced redox reaction in the basic solution is:
O2 + 2H2O + Cr3+ → H2O2 + Cr2O7^2- + 4OH-
What is a redox reaction?Generally, The half-reaction method involves breaking the overall redox reaction into two half-reactions: oxidation and reduction. The oxidation half-reaction is:
Cr3+ → Cr2O7^2- + 3e-
The reduction half-reaction is:
O2 + 2H2O + 4e- → 4OH-
To balance the electrons in the oxidation half-reaction, we need to add 3 electrons on the right side. To balance the electrons in the reduction half-reaction, we need to add 4 electrons on the left side.
When we combine the two half-reactions, we get:
O2 + 2H2O + Cr3+ → H2O2 + Cr2O7^2- + 3e-
We then add 4OH- on the right side to neutralize the electrons on the left side, giving us:
O2 + 2H2O + Cr3+ → H2O2 + Cr2O7^2- + 3e- + 4OH-
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Calculate the total number of atoms in 0.111 mol of Fe(CO)3(PH3)2. please write as many steps as you can so I can understand it.
The total number of atoms in 0.111 mole of Fe(CO)3(PH3)2 is 1.00 × 10^24.
To calculate the number of atoms first we need to calculate the number of moles. In 1 mole of a substance, the number of atoms is NA or 6.023×1023 atoms. This number is also known as Avogadro's number. Multiplying the given moles with NA gives the total number of atoms.
Here, we will find the total number of moles of each element. So let us consider element present in the compound and number of moles of that element. Such that Fe- 1, C- 3, O - 3 , P – 2 , H – 6 . So total number of atoms molecule is 15. The number of atoms in 0.111 moles of Fe(CO)3(PH3)2, therefore 15 x 0.111 which gives 1.665 moles of atom. That is 1.665 x 6.023 x 10^23. This gives the value as 1.00 x 10^24.
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Write down a balanced equation for SnO2 + H2 → Sn + H2O and tell which substance is the oxidising agent and which is the reducing agent.
Answer:
Sn is the oxidation agent and h2 is the reducing agent
Explanation:
Because oxidation agent means reduction which means the lose of oxygen and Sn lose oxygen.
While reduction agent means oxidation which also means the gain of oxygen and h2 gain oxygen.
I hope you understand my explanation if you need any help in chemistry I'm always here
Which one of the following reactions would produce (S)-3-methoxyheptane in high yield? Entry field with correct answer
O sodium methoxide + (R)-3-bromoheptane
O sodium methoxide + (S)-3-bromoheptane
O sodium (R)-3-heptoxide + bromomethane
O sodium (S)-3-heptoxide + bromomethane
O Sodium methoxide + (S)-3-bromoheptane is the reactions would produce (S)-3-methoxyheptane in high yield.
Write about (S)-3-methylheptane.There are 26 atoms in the (S)-3-methylheptane molecule (s). Eight carbon atoms and 18 hydrogen atoms are present (s). Therefore, C8H18 can be used to represent the chemical formula of (S)-3-Methylheptane.
The molecular formula, as opposed to the empirical formula, which gives the numerical proportions of atoms of each kind, is the basis for the chemical formula of (S)-3-Methylheptane, which is based on the molecular formula and does not include structural information.
According to the rule of conservation of mass, a chemical reaction does not cause a change in the amount of any one of the elements included in a chemical formula. In light of the chemical formula, each side of the equation must therefore represent the same amount of any given element.
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A 75 N force stretches a spring 175 cm. What was the proportionality constant?
Answer:
The proportionality constant of the spring is 0.42857 N/cm.
Explanation:
The proportionality constant (k) of a spring is given by the equation: force (F) = k * displacement (x)
k = F / x
Therefore, to find the proportionality constant of the spring, we can divide the force applied (75 N) by the displacement (175 cm)
k = 75 N / 175 cm
k = 0.42857 N/cm
The proportionality constant of the spring is 0.42857 N/cm.
If a scientist was attempting to decide what type of light was best for reducing migraines, what is a dependent variable that would be tested? Number of migraines recorded in the study The different types of light used in the study Randomization of people used in the study The number of light bulbs used in the study
The dependent variable in this experiment is the number of migraines recorded in the study (option A).
What is dependent variable?Dependent variable in an experiment is the outcome measured to see the effectiveness of the treatment.
In an experiment, the independent variable is altered or changed to bring about a response in the dependent variable.
According to this question, if a scientist was attempting to decide what type of light was best for reducing migraines, the number of migraines recorded is the dependent variable.
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What is the mass of 3.25 moles of NaF
Calculate the pH of a solution prepared by dissolving 0.21 mol of acetic acid and 0.43 mol sodium acetate in water and adjusting the volume to 500 mL
The pH of the solution is 5.07.
What is the pH?We know that when we mix the sodium acetate with a solution of acetic acid what we are going to have is a buffer. We know that the buffer is the kind of solution that we are able to get from a weak acid and its salt just as acetic acid and sodium acetate.
We know that;
Molarity of the salt = 0.43/0.5 L = 0.86 M
Molarity of the acid = 0.21/0.5 L = 0.42 M
Hence;
pH = pKa + log(salt/acid)
pH = 4.76 + log(0.86/0.42)
pH = 5.07
We would have a pH of 5.07
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Predict the product formed when calcium, Ca, combines with arsenic, As? (Please explain why) a. Ca3As2 b. Ca2As3 c. CaAs d. Ca2As2 e. Ca3As3
The chemical element calcium has the atomic number 20 and the letter Ca as its symbol. Calcium is an alkaline earth metal that reacts with air to create a black oxide-nitride coating.
What happens when calcium reacts with?With the chemical symbol Ca and atomic number 20, calcium is a member of the calcium family. Calcium is a reactive metal and an alkaline earth metal that, when exposed to air, develops a shady oxide-nitride layer.
In this article, the arsenic acid formula—also known as orthoarsenic acid formula or as arsoric acid formula—is explored. Three hydroxyl and one oxo group make up this arsenic oxoacid.
Arsenopyrite is the mineral with the greatest prevalence of arsenic. Realgar, orpiment, and enargite are some more minerals. Most arsenic is created as a byproduct of the copper and lead refining process.
Metal calcium and water interaction - Less vehemence is produced when calcium metal combines with water.
Therefore, the correct answer is option e) Ca3As2.
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What is the correct representation for the subshell with n = 2 and l = 1?
2p
1p
1d
2d
Answer:
The next part is 4, 16, 32
Explanation:
just did it on edge :))
In a metabolic pathway, a reaction that best serves as a committed step:
Follows Michaelis-Menten kinetics.
Is endergonic.
Is shared amongst at least two pathways.
Is a near equilibrium reaction.
Is metabolically irreversible.
These pathways increases the energy of efficiency transfer and a single enzyme catalyzes a specific reaction.
Which of these changes is an example of a physical change?
A. electrolysis of water forming hydrogen and oxygen
B. cooking an egg
C. melting ice
D. iron combining with oxygen to form rust
Answer: C. Melting Ice
Explanation: The rest are chemical changes, the ice is the same substance (water), just changing physical forms, solid --> liquid
Calculate the binding energy per nucleon for 3He and 4He. MeV/nucleon (for 3He) = MeV/nucleon (for 4He) = Which nucleus is more tightly bound?
Nuclear binding energy is defined as the minimum amount of energy required to disassemble or break down an atom's nucleus into the subatomic particles that make it up (which are protons and neutrons).
Define binding energy per nucleon?Protons and neutrons, a pair of subatomic particles found in the nucleus, are collectively referred to as nucleons.The difference between nuclear attraction and the disruptive energy of the electric force constitutes the net binding energy associated with a certain nucleus.
It is important to note that as the number of nucleons in the nucleus increases, so does the net binding energy per nucleon.As a result, the atomic number is inversely proportional to the net binding energy per nucleon. Using the formula BE=(m)c2, where m is the mass defect, get the total binding energy (BE).
BE divided by A yields the binding energy per nucleon (BEN) (Equation 10.3. 3). BE=[2mp+2mn]−m(4He)c2. Say, for instance, that we have a nucleus of mass MA and Z protons, N neutrons, and A.
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draw the alcohol you would use to produce each of the following ketones: draw all hydrogen atoms.
A. 3-pentanone
B. 2-pentanone
C. 3-hexanone
Atoms one of the following ketones, all of which contain hydrogen atoms (C5H10), would be created using alcohol.
What is hydrogen, H2 or H?The chemical formula of hydrogen is H2, and it has an molar mass of 1. The atomic number one of the lightest element is hydrogen, abbreviated H. It is a gas at room pressure and temperature that has the functional group H2 hydrogen chloride (HCl), which is a combination of elements hydrogen and chlorine. It is also tasteless, odorless, and highly combustible. Hydrochloric acid is the name given to a gaseous solution in water.
Why H2 rather than H?As a result, when two hydrogen atoms bind, they share electrons. The term for this is covalent bonding. In your forthcoming classes, you will receive a detailed introduction to it. Consequently, hydrogen is H2 rather than H.
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