Calculate the wavelength of light emitted when each of the following transitions occur in the hydrogen atom. What type of electromagnetic radiation is emitted in each transition? n=3 --> n=2
Answers
Answer:
The wavelength of the emitted photon will be approximately 655 nm, which corresponds to the visible spectrum.
Explanation:
In order to answer this question, we need to recall Bohr's formula for the energy of each of the orbitals in the hydrogen atom:
, where:
[tex]m_{e}[tex] = electron mass
e = electron charge
[tex]\epsilon_{0}[tex] = vacuum permittivity
[tex]\hbar[tex] = Planck's constant over 2pi
n = quantum number
[tex]E_{1}[tex] = hydrogen's ground state = -13.6 eV
Therefore, the energy of the emitted photon is given by the difference of the energy in the 3d orbital minus the energy in the 2nd orbital:
[tex]E_{3} - E_{2} = -13.6 eV(\frac{1}{3^{2}} - \frac{1}{2^{2}})=1.89 eV[tex]
Now, knowing the energy of the photon, we can calculate its wavelength using the equation:
[tex]E = \frac{hc}{\lambda}[tex], where:
E = Photon's energy
h = Planck's constant
c = speed of light in vacuum
[tex]\lambda[tex] = wavelength
Solving for [tex]\lambda[tex] and substituting the required values:
[tex]\lambda = \frac{hc}{E} = \frac{1.239 eV\mu m}{1.89 eV}=0.655\mu m = 655 nm[tex], which correspond to the visible spectrum (The visible spectrum includes wavelengths between 400 nm and 750 nm).
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Suppose you had 2.0158grams of hydrogen (H2). A.How many moles of hydrogen do you have? B. How many moles of oxygen would react with this much hydrogen? C. What mass of oxygen would you need for this reaction? D. How many grams of water would you produce?
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Count the total number of atoms in sio2:
B.It is the sum of internal energies of two or more substances.
C.It is the portion of internal energy that can be transferred from one substance to another.
D.It is the portion of potential energy that can be transferred from one substance to another.
Answers
Thermal energy is the difference between internal energies of two or more substances. Therefore, option A is correct.
What is thermal energy ?
The energy present in a system that determines its temperature is referred to as thermal energy. Thermal energy flows as heat. Thermodynamics is a whole field of physics that studies how heat is transmitted across various systems and how work is done in the process.
The average kinetic energy of the system's component particles as a result of their motion makes up the thermal energy of the system. The sum of the kinetic and potential energies of the system's component particles represents the system's overall internal energy.
Thermal energy is also referred to as heat energy. A moving object's kinetic energy is its energy. Thermal energy is a type of kinetic energy because it is produced by moving particles.
Thus, option A is correct.
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Answer:
Tha answer I s D. Hope it will work to u
Answers
Answer:Na
Explanation:
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Reaction 1: S(s) + O₂(g) → SO₂(g) ΔrH₁ = -296.8 kJ/mol.
Reaction 2: H₂(g) + ½ O₂(g) → H₂O(l) ΔrH₂ = -285.8 kJ/mol.
Reaction 3: H₂(g) + S(s) → H₂S(g) ∆rH₃ = -20.6 kJ/mol.
Reaction 4: 2H₂S(g) + 3O₂(g) → 2H₂O(l) + 2SO₂(g) ΔrH₄ = ?
Using Hess's law reaction number 4 is sum of reaction number 1 multiply with two, reaction number 2 multiply with two and reaction 3 reversed and multiply with two:
ΔrH₄ = 2 · (-296.8 kJ/mol) + 2 · (-285.8 kJ/mol) + 2 · 20.6 kJ/mol.
ΔrH₄ = -1124 kJ/mol.
Answers
Final answer:
Given 44.8 liters of H₂ gas, 22.4 liters of O₂ gas would be required for a complete reaction, producing 44.8 liters of H₂O gas. This conclusion is reached by leveraging Avogadro's law, ideal gas law, and understanding stoichiometry.
Explanation:
The question involves understanding how standard molar volumes and stoichiometry play into gas reactions. Avogadro's law states that the volume of a gas is directly proportional to the number of moles of the gas. Therefore, if you have 44.8 liters of H₂ gas, complying with Avogadro's law and the given ratios of gases as stated in the problem, you can conclude that to react completely, you would need 22.4 liters of O₂ gas, producing a total of 44.8 liters of H₂O gas as per reaction stoichiometry.
Avogadro's law is critical to understanding gas behavior and stoichiometry. Equally, understanding the concept of the ideal gas law is necessary to perform stoichiometric calculations involving gaseous substances.
Dalton's law of partial pressures also plays into calculations involving gaseous mixtures and helps to understand how different gases within a mixture interact. Overall, comprehending these concepts grants insights into gas behavior under varying temperature, pressure, and volume conditions and how gases react in chemically balanced equations.
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Explanation:
Number of moles consisting in a liter of solution is known as molarity.
Mathematically, Molarity = \frac{\text{no. of moles}}{\text{Volume in one liter}}[/tex]
It is given that volume is 10 liter and there is 5.0 moles of solute. Hence, we will calculate the molarity as follows.
Molarity =
=
= 0.5 mol/L
Thus, we can conclude that molarity of the given solution is 0.5 mol/L.
So let's plug in the information.
5.0 moles/10L = 0.5 M
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The field of physics known as calorimetry determines how much heat is transferred during a chemical or physical process.
It requires precisely calculating the heat transport in a system using a calorimeter, a specialist tool. Two substances coming into contact at differing temperatures normally causes heat exchange to occur until thermal equilibrium is attained. The amount of heat transported can be determined by monitoring the temperature change and taking into account the individual heat capacity of the substances involved. Calorimetry has many uses, including figuring out how much energy is in food, researching chemical processes, and looking at the thermal characteristics of various materials. It is necessary to comprehend how energy is transformed in distinct systems.
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