fill in the molecular orbital energy diagram for the diatomic molecule he2.
Answers
Molecular orbital energy diagram for He2: The molecular orbital energy diagram is used to show the formation of a molecular bond in a molecule. It is a way to explain how electrons occupy molecular orbitals. The following is the main answer for filling in the molecular orbital energy diagram for the diatomic molecule He2:
He2 is a homonuclear diatomic molecule containing two helium atoms. Each helium atom has two valence electrons that participate in the bond formation process. To form the molecular orbital energy diagram, we will follow the steps mentioned below: The first step is to determine the atomic orbital energy of each helium atom, which is the same. We can use the periodic table to find the energy level of helium's valence electrons, which is 1s.
- The second step is to combine the atomic orbitals of helium to form molecular orbitals. Since the helium atoms are identical, the molecular orbitals produced will be degenerate, meaning that they have the same energy level. For He2, there will be four molecular orbitals formed, and they are labeled as σ1s, σ*1s, σ2s, and σ*2s.The third step is to populate the molecular orbitals with electrons. Since helium has two valence electrons, they will fill up the molecular orbitals from the lowest to the highest energy level. The molecular orbital energy diagram for He2 is shown below.
The molecular orbital energy diagram shows that He2 has a bond order of zero, which indicates that it is not a stable molecule. This is because the two electrons in the bonding molecular orbital are canceled out by the two electrons in the antibonding molecular orbital. Hence, the net effect of the electron pair in He2 is zero.
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Related Questions
Consider the balanced reactionbelow:2FeBr3 + 3Na2S → Fe2S3 +6NaBrHow many moles of iron(III) sulfide,Fe2S3, would be produced from thecomplete reaction of 449 g iron(III)bromide, FeBr3?
Answers
Given :
• Molar mass of FeBr3 = 295.56 g/mol
,• Mass of FeBr3 = 449 g
(I) Calculate moles of FeBr3 \(\begin{gathered} \text{Moles = }\frac{mass\text{ }}{\text{Molecular mass }} \\ \text{ = }\frac{449\text{ g }}{295.56\text{ g/mol}} \\ \text{ =1.519 } \\ \text{ }\approx1.52molesofFeBr_3 \end{gathered}\)(II) Calculate moles of Fe2S3The balanced reaction is given as :
\(2FeBr_3+3Na_2S\text{ }\Rightarrow Fe_2S_{3\text{ }}+\text{ 6NaBr }\)by stoichiometry , we can see that :
• 2 moles of FeBr3 produces 1 moles of Fe2S3
Therefore ;
• 1.52 mol of febr3 produces X Fe2S3
,• X moles of FE2S3, = (1.52moles FeBr3 * 1 mol Fe2S3) /2 moles
FeBr3.
=0.755 moles
≈0.76 moles
• This means that 0.76 moles of Fe2S3 would be produced from the complete reaction of 449 g iron(III)bromide,
An electron in a hydrogen atom moves from level 1 to level 4. The electron then drops from level 4 to level 2. Which
statement describes the most likely result?
O The energy absorbed in the first move equals the energy released in the second move.
O The energy absorbed in the first move is greater than the energy released in the second move.
O The energy released in the first move equals the energy absorbed in the second move.
O The energy released in the first move is greater than the energy absorbed in the second move.
Answers
Answer:
The energy absorbed in the first move is greater than the energy released in the second move
Explanation:
Electrons require (absorb) energy to move to a higher energy level when there is a large external heat source, the presence of an electric field or by colliding with other electrons
And the amount of energy absorbed by the electron is exactly equal to the change in the energy state between the initial energy level of the electron and the destination energy level
Therefore, given that the energy level of the electron at level 2 is higher than the energy level of the electron when at level 1, we have;
The difference in the energy level between level 4 and level 1 is greater than the difference in the energy level between level 4 and level 2 and more energy is absorbed and therefore, released when the electron moves from level 1 to level 4 than when the electron drops from level 4 to level 2.
The most likely result is that 'the energy absorbed in the first move is greater than the energy released in the second move'.
During an investigation, a scientist heated 123.6 g of copper carbonate till it decomposed to form a black residue. The total mass of the black residue formed was 79.6 g. Does the law of conservation of mass hold true in this case?
Answers
No, the Law of Conservation of Mass does not hold true for this case because the mass of reactant is not equal to the mass of product.
What is Law of Conservation of Mass?
According to the Law of Conservation of Mass, during a chemical reaction, the total masses of the products and reactants must be equal.This law states that although mass can be reorganized in space or the entities connected to it can change shape, mass itself cannot be generated or destroyed.For instance, the mass of the components prior to a chemical reaction (reactants) is equal to the mass of the components following the reaction (products).Therefore, the entire mass of the reactants, or starting materials, must be equal to the mass of the products during any chemical reaction and low-energy thermodynamic processes in an isolated system.Here, the mass of the reactant (copper carbonate) is not equal to the mass of the product (black residue). Hence, the Law of Conservation of Mass is not applicable in this case.To learn more about Law of Conservation of Mass from the given link
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What is the average atomic mass of the element represented above
Answers
The average atomic mass of the element which is represented in the above diagram is 16.
What is meant by an element?An element is defined as a substance which cannot be split into simpler forms by ordinary chemical process. There are different categories of elements including the metals, nonmetals and metalloids.
That being said, the oxygen is a chemical element which belongs to group 6 and period 2 in the periodic table, has valence electron of 6, and an average mass of 16. In addition to this, oxygen is a metal. Some few examples of other chemical elements include:
Hydrogen, HHelium, HeLithium, LiBeryllium, BeBoron, BCarbon, CNitrogen, NOxygen, OFluorine, FNeon, NeSodium, NaMagnesium, MgAluminum, AlSo therefore, it can be deduced from the explanation given above that oxygen is a chemical element which is diatomic.
Complete question:
What is the average atomic mass of the element represented above
a. 8
b. 16
c. 32
d. 64
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What types of energy does the Sun transmit to Earth?
Answers
Answer:
how many colors are there
why does each element have its own unique atomic line spectrum? multiple choice question. radiation that is not visible light does not show up in the atomic line spectrum. the lines in the spectrum represent the radiation absorbed or emitted over a small interval of time only. the lines correspond to the energy changes we can detect, since it is impossible to detect every change. the lines in the spectrum correspond to the differences between the specific energy states in the atom.
Answers
Answer:
The lines in the spectrum correspond to the differences between the specific energy states in the atom.
Explanation:
the specific heat capacity of silver is 0.24j/g oc . a. calculate the energy required to raise the temperature of from 0 oc to 25oc.
Answers
900J energy is required to raise the temperature of from 273K to 298K.
Knowing the mass of the substance, the change in the system's temperature, and the substance's specific heat capacity will allow you to compute the quantity of heat transmitted in a given system.
Given in the question:
Specific heat capacity, c = 0.24J/\(g^{0}\)c
Mass, m = 150.0g
initial temperature, \(T_{1}\) = 273K = \(0^{0}C\)
Final temperature, \(T_{2}\) = 298K = \(25^{0}C\)
The heat absorbed (q) by the system is calculated as follows:
=> \(q = cm(T_{2}-T_{1})\)
=> \(q = 0.24J/g^{0}C \times 150.0g(25^{0}C-0^{0}C)\)
=> \(q = 900J\)
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when heated, elemental phosphorus, p4, produces phosphine, ph3, and phosphoric acid, h3po4. how many grams of phosphine are produced if 56 g p4 have reacted?
Answers
In this reaction when heated, elemental phosphorus, p4, produces phosphine, ph3, and phosphoric acid, h3po4.The grams of phosphine are produced if 56 g p4 have reacted are 38.4 g.
Write and stability the equation.
Balanced equation is P4⇒PH3+ H3PO4Convert grams P4 to mols. mols = grams/molar mass.56 x 1 mol P4 / 123.88 P4 = 0.45 MOL P4.Use the coefficients withinside the balanced equation to transform moles P4 to moles PH3.Convert moles PH3 to g PH3. g = moles x molar mass.0.45 mol P4 X 5 mol PH3 / 2mol P4 = 1.13 mol PH3.1.13 mol PH3 x 34 g PH3/ 1 mol PH3 = 38.4 gRead more about moles :
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If an electron is confined in a 10 nm box, calculate
its energy in the ground state and 15t
excited state
If an electron is confined in a 10 nm box, calculate
its energy in the ground state and 1st
excited state
Answers
The energy in the ground state of the electron confined in a 10 nm box is approximately 10.89 eV, and the energy in the first excited state is approximately 43.56 eV.
To calculate the energy of an electron confined in a 10 nm box, we can use the formula for the energy levels of a particle in a one-dimensional infinite potential well:
E_n = (n^2 * h^2) / (8 * m * L^2)
where:
E_n is the energy of the nth energy level,
n is the quantum number of the energy level (n = 1 for the ground state),
h is the Planck's constant (6.626 x 10^-34 J·s),
m is the mass of the electron (9.10938356 x 10^-31 kg),
L is the length of the box (10 nm = 10 x 10^-9 m).
Let's calculate the energy in the ground state (n = 1) and the first excited state (n = 2):
For the ground state (n = 1):
E_1 = (1^2 * h^2) / (8 * m * L^2)
Substituting the values:
E_1 = (1^2 * (6.626 x 10^-34 J·s)^2) / (8 * (9.10938356 x 10^-31 kg) * (10 x 10^-9 m)^2)
Calculating this expression will give us the energy in the ground state.
For the first excited state (n = 2):
E_2 = (2^2 * h^2) / (8 * m * L^2)
Substituting the values:
E_2 = (2^2 * (6.626 x 10^-34 J·s)^2) / (8 * (9.10938356 x 10^-31 kg) * (10 x 10^-9 m)^2)
Calculating this expression will give us the energy in the first excited state.
Please note that the energies calculated will be in joules (J). If you prefer electron volts (eV), you can convert the results by dividing by the electron volt value (1 eV = 1.602 x 10^-19 J).
Performing the calculations:
For the ground state:
E_1 = (1^2 * (6.626 x 10^-34 J·s)^2) / (8 * (9.10938356 x 10^-31 kg) * (10 x 10^-9 m)^2) ≈ 1.747 x 10^-18 J
For the first excited state:
E_2 = (2^2 * (6.626 x 10^-34 J·s)^2) / (8 * (9.10938356 x 10^-31 kg) * (10 x 10^-9 m)^2) ≈ 6.987 x 10^-18 J
Converting the energies to electron volts (eV):
E_1 ≈ 10.89 eV (rounded to two decimal places)
E_2 ≈ 43.56 eV (rounded to two decimal places)
Therefore, the energy in the ground state of the electron confined in a 10 nm box is approximately 10.89 eV, and the energy in the first excited state is approximately 43.56 eV.
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An electron will emit energy in quanta when its energy state changes from 4p to
A)
55
B)
бр
C)
5p
D)
35
Answers
An electron will emit energy in quanta when its energy state changes from 4p to 3s.
When a quantum mechanical system or particle is bound, or spatially constrained, it can only take on specific discrete energy values, or energy levels. As opposed to classical particles, which can have any energy level, this. The phrase can also refer to the energy levels of nuclei or the vibrational or rotational energy levels in molecules. The term is most frequently used to describe the energy levels of the electrons in atoms, ions, or molecules that are confined by the electric field of the nucleus. A system with such distinct energy levels is said to have a quantized energy spectrum.
An electron shell, also known as a primary energy level, is the orbit of one or more electrons around the nucleus of an atom in chemistry and atomic physics. The "1 shell" (also known as the "K shell") is the shell that is closest to the nucleus. The "2 shell" (also known as the "L shell"), "3 shell" (also known as the "M shell"), and so forth are the shells that are further and more away from the nucleus. The shells are either labelled alphabetically with X-ray notation letters or with the primary quantum numbers (n = 1, 2, 3, 4...) (K, L, M, N...).
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Given the equation
N2(g) +3H2 (g)--> 2NH3 (g)
1 mole of N2 gas is needed to completely react with 3 moles of H2 gas.
How many molecules of H2 gas are needed?
Answers
Answer:
numbers of molecules = 3×6.023×10-23
List two differences and two similarities between a recipe for baking a cake and a chemical reaction.
Answers
The main difference between a recipe for baking a cake and a chemical reaction is that baking a cake is a chemical change whereas a chemical reaction may be a chemical and physical change.
The similarities between a recipe for baking a cake and a chemical reaction is that the molecules react with each other and in both new substances are formed at the end.
How is baking a cake similar to a chemical reaction?
When you bake a cake, the ingredients pass through a chemical change. A chemical change occurs when the molecules are rearranged to form a new substance. When you start baking, you have many ingredients. Baking a cake is a chemical change because the ingredients rearrange to form a new substance which is not reversed. The sugar, flour, and eggs can't be separated from each other. The properties of the materials have changed so it is considered as a chemical change.
So we can conclude that baking a cake and a chemical reaction is different due to the presence of chemical change whereas chemical reactions have both chemical and physical change. The similarity between a recipe for baking a cake and a chemical reaction is that in both new substances are formed at the end.
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During a course of reaction, can only one activated complex be formed for a particular type of reaction?
Answers
No, during a course of reaction, multiple activated complexes can be formed for a particular type of reaction. An activated complex is a short-lived, high-energy intermediate state that occurs during a chemical reaction.
What is energy ?Energy is a fundamental concept in physics that describes the capacity of a physical system to do work or produce a change. It is a property of matter and radiation and can be converted from one form to another. There are various types of energy, including kinetic energy (energy of motion), potential energy (energy due to position or configuration), thermal energy (energy due to the temperature of a system), chemical energy (energy stored in the bonds between atoms and molecules), and nuclear energy (energy stored in the nucleus of an atom). The unit of energy is the joule (J) in the SI system.
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Draw the electron dot structure for the convalebt bond of F and I
Answers
Answer:
this is your answer hope it will help you
substance with 169 melting point
Answers
Answer:
the substance with 169 melting point is buten
in which oxididised state is the idoine in seaweed
Answers
The iodide ion is Oxidized to molecular iodine.
_______________is a physical property of butter or any solid fat.
Answers
Answer- better
_______________
hope it will help you
Which object is at the center of the solar system in the heliocentric model?
A. The asteroid belt
B. The Sun
C. Earth
D. The Moon
Answers
In the heliocentric model, the object at the center of the solar system is the Sun. Therefore, the answer is B.
What is the heliocentric model?
The heliocentric model is a theory that places the Sun at the center of the solar system, with all the planets orbiting around it. This model was first proposed by the ancient Greek astronomer Aristarchus of Samos in the 3rd century BCE, but it was not widely accepted until the 16th century when the Polish astronomer Nicolaus Copernicus presented a detailed mathematical description of the heliocentric model.
The heliocentric model provided a more accurate description of the solar system, and it was later confirmed by the observations and calculations of other astronomers such as Johannes Kepler and Galileo Galilei. The heliocentric model is now widely accepted, and it forms the basis of modern astronomy.
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The complete question is: The Sun is at the center of the solar system in the heliocentric model.
What is the advantage of using multiple lines in a line graph
Answers
The lines in a line graph aid in the fairly early detection of trends, allowing the viewer to make predictions about the data that has not yet been recorded.These are appropriate for illustrating the data points since, given one variable, the other is simple to ascertain.
What is a line graph?A line graph, often known as a line chart, is a visual representation of data that is continuously changing over time.
There are two axes. in a line graph, the occurrences and categories being compared throughout time are shown on the x-axis (abscissa), and the scale, which is a group of integers that reflects the data and is divided into equal intervals, is shown on the y-axis (ordinate).
Depending on the data, the graph's lines may either decline or ascend. It is practical to plot time graphs along the x/y axis since it shows the rise and fall of data points in great detail.
The reader may readily see changes in one group over time by choosing the appropriate scales for each axis (time on the x-axis and change is measured on the y-axis).
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In 1927, a little-known Belgian priest named Georges Lemaître was the first to propose an expanding universe, based on Einstein’s theory of general relativity. Two years later, Edwin Hubble published a scatterplot of recessional velocity vs. galactic distance, shown above in the Velocity-Distance Relationship among Extra-Galactic Nebulae. This was the first observational evidence to support the hypothesis that grew into the Big Bang theory.
Describe how the evidence you have gathered in this Gizmo demonstrates that the universe is expanding and helps to confirm the Big Bang theory.
Answers
One of the pieces of evidence of the big bang theory where that celestial objects are scattered in the universe because of an explosion that supports the idea of the big bang.
What is the big bang?The big bang is how astronomers explain the way the universe began.
The evidence that I've gathered from the widget that demonstrates that the universe is expanding is that galaxies and other celestial objects are moving away from each other, which is also one of the evidence of the big bang theory where the celestial objects are scattered in the universe because of an explosion that supports the idea of the big bang.
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Which of the following statements is true?
A.Most meteors fall into Earth's oceans, where they cause no damage.
B.Jupiter is the only planet which rotates almost on its side.
C.Earth's blue color is the result of methane in the atmosphere.
D.Scientists believe that Mars once had water on its surface.
Answers
Answer:
d.
Explanation:
Answer:
D!
Explanation:
A is not true! When big meteors fall into the ocean, they cause mega-tsunamis I think, which does a lot of damage.
B, no, Uranus does too.
C, I think this is untrue, red wavelength and reflects the blue the blue!
D, is so true! A lot of reliable sources on this one!
Sorry if I did any wrong, I haven't learn chemistry in school yet.
A student is 159cm tall and weighs45.8kg what is the height in inches and weight in pounds ?
Answers
Height in inches is 62.6 inches and weight in pounds are 101 pounds
Height is a way to measure someone or something from base to top or head to toe
Here given data is student height = 159cm tall and weight is = 45.8kg
So we have to convert
Height in cm = height in inches
Weight in kg = weight in pounds
So, 1 inches = 2.45cm
Height = 159cm×1 inches/ 2.45cm
Height = 62.6inches
Now, 1kg = 2.2045 pounds
Weight = 45.8kg×2.2045 pounds/1kg
Weight = 101 pounds or lbs
Height = 62.6inches and weight = 101 pounds or lbs
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how many grams of k o h are needed to neutralize 12.6 ml of 0.14 m h c l in stomach acid?
Answers
0.0989 grams of KOH is needed to neutralize 12.6 mL of 0.14 M HCl in stomach acid.
Volume of HCl solution = 12.6 mL = 0.0126 L
The concentration of HCl solution = 0.14 M We have to find the amount of KOH required to neutralize the given volume and concentration of HCl.
In order to calculate the amount of KOH, we need to first calculate the number of moles of HCl using the formula of Molarity;
Molarity = (Number of moles of solute) / (Volume of solution in liters)0.14 M = n(HCl) / 0.0126L0.14 × 0.0126 = n(HCl)n(HCl) = 0.001764 moles of HCl
Now, the balanced chemical equation for the reaction of KOH with HCl is;KOH + HCl → KCl + H₂OOne mole of KOH reacts with one mole of HCl.
Therefore, the number of moles of KOH required to neutralize the given amount of HCl would be equal to 0.001764 moles. Now, let's calculate the amount of KOH in grams.
Molar mass of KOH = 39.1 + 16.00 + 1.008 = 56.108 g/mol0.001764 moles of KOH would weigh = 0.001764 × 56.108 = 0.0989
hence, the amount of KOH required to neutralize the given volume and concentration of HCl would be 0.0989 grams.
Thus, 0.0989 grams of KOH is needed to neutralize 12.6 mL of 0.14 M HCl in stomach acid.
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Does a change in the molality cause the boiling point of a solution to increase or decrease?.
Answers
Yes, a change in the molality causes the boiling point of a solution to increase. Molality refers to the number of moles of solute present in a kilogram of solvent. It's important to note that when solute particles are added to a solvent, the solution's boiling point increases and the freezing point decreases.
There is a direct relationship between the molality of a solution and its boiling point. When a solute is dissolved in a solvent, the solution's boiling point increases. The solute particles have a greater influence on the solution's properties than the solvent particles, which results in an increase in the solution's boiling point.
The boiling point of a solution is greater than that of the pure solvent due to the presence of a solute. As a result, the boiling point of a solution can be used to determine the solute's molecular weight. The difference between the boiling points of a pure solvent and a solution of the same solvent and solute is proportional to the solute's molality.
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Venice is ____ of the Adriatic Sea
a - northeast
b - southwest
c - northwest
d- southeast
fill in the blank with one of these ^
Answers
A proposed mechanism for ozone destruction in the late spring over northern latitudes in the lower stratosphere begins with the photochemical decomposition of ClONO_2 to Cl and NO_3, followed by photochemical decomposition of the later to NO and O_2. Deduce a catalytic ozone destruction cycle, requiring no atomic oxygen, that incorporates these reactions. What is the overall reaction?
Answers
The overall reaction is:O₃ + O → 2O₂
A catalytic ozone destruction cycle can be deduced from the proposed mechanism for ozone destruction in the late spring over northern latitudes in the lower stratosphere.
The catalytic cycle requires no atomic oxygen and incorporates the following reactions:1. The photochemical decomposition of ClONO₂ to Cl and NO₃.
ClONO₂ → Cl + NO₃2.
The reaction between Cl and O₃ to produce ClO and O₂.
Cl + O₃ → ClO + O₂3.
The reaction between ClO and O to produce Cl and O₂.
ClO + O → Cl + O₂
The overall reaction is:O₃ + O → 2O₂
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What volume of "laughing gas" (N2O) will be produced from 60 g of nitrogen gas (N2) and 85 g of oxygen gas (O2)? How much of the excess reactant will be left? 2N2 + O2 -> 2N2O
Answers
Answer:
94.16g of N2O
50.88g of O2
Explanation:
O2 reacts with N2 as follows:
2N2 + O2 → 2N2O
To find moles of N2O produced we need to convert the mass of each gas to moles to find limiting reactant and the moles of N2O that could be produced:
Moles N2 (Molar mass: 28g/mol):
60g N2 * (1mol / 28g) = 2.14 moles N2
Moles O2 (Molar mass: 32g/mol):
85g O2 * (1mol / 32g) = 2.66 moles O2
For a complete reaction of 2.14 moles of N2 are needed:
2.14 mol N2 * (1mol O2 / 2 mol N2) = 1.07 moles of O2.
As there are 2.66 moles of O2, reactant in excess is O2 and will remain:
2.66 moles - 1.07 moles =
1.59 moles O2. The mass is:
1.59 moles O2 * (32g / mol) =
50.88g of O2And there are produced:
2.14 mol N2 * (2 moles N2O / 2 moles N2) = 2.14 moles N2O.
The mass is (44g/mol for N2O):
2.14 moles N2O * (44g/mol) =
94.16g of N2OWhich term describes this reaction? upper c upper h subscript 3 upper b r (a q) plus upper o upper h superscript minus (a q) right arrow upper c upper h subscript 3 upper o upper h (a q) plus upper b r superscript minus (a q). addition condensation elimination substitution
Answers
The reaction is a substitution reaction since bromide ion was replaced by hydroxide ion.
What is a chemical reaction?A chemical reaction is a change which results in a the permanent rearrangements of the atoms and constituents of a substance such that new substances are formed.
The given reaction is a as follows:
\(CH_3Br (aq) + OH^{-} (aq) \rightarrow CH_3OH (aq) + Br^{-} (aq) \\ \)
Bromide ion was replaced by hydroxide ion.
Therefore, the reaction is a substitution reaction.
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Answer: D-substitution
Other person is right its
Explanation:
13. Due to changes in energy, substances can change their state of matter. When
this occurs, which of the following resulting molecules will likely have the LEAST
amount of kinetic energy?
a. CO2 (9)
b. H2O (1)
c. C&H12O6 (s)
d. All three molecules will likely have the same amount of kinetic energy
Answers
A cylinder/piston contains 1 kg propane gas at 100 kPa, 300 K. The gas is compressed reversibly to a pressure of 80o kPa. Calculate the work required if the process is adiabatic.
Answers
So, the work required to compress the propane gas from 100 kPa and 1 kg to 80 kPa and 1.25 kg is 10,000 J.
In thermodynamics, work is defined as the transfer of energy due to a net force acting on a system. The work can be done on a system by an external agent, such as a gas compressor, and it can be measured in joules (J).
When a system is compressed, the volume of the system decreases, and the pressure of the system increases. The work required to compress the system can be calculated using the formula for work:
To calculate the work required to compress the propane gas, we can use the formula for work:
W = ∫\(P_1V_1 - P_2V_2 dV\)
In this case, the initial pressure is 100 kPa and the initial volume. we get:
W = \((100 kPa * 1 x 10^{-3} m^3) - (80 kPa * 1.25 kg * 10^{-3} m^3)\)
= 10,000 J
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