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Using Table 5.2, write down the mathematical expression for the
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PRINCIPLES OF MODERN CHEMISTRY-OWLV2
- 8C.4 (a) the moment of inertia of a CH4 molecule is 5.27 x 10^-47 kg m^2. What is the minimum energy needed to start it rotating? 8C.5 (a) use the data in 8C.4 (a) to calculate the energy needed excite a CH4 molecule from a state with l=1 to a state with l=2arrow_forwardThe wavefunction of one of the d orbitals is proportional to sin2θ sin 2ϕ. At what angles does it have nodal planes?arrow_forward6. Wavefunctions Show all work a. Use the radial function provided for the 6f orbital of hydrogen to calculate the values of r for which radial nodes exist. Express your answer in picometers. Recall, ao = 52.9 pm R6f = 3 σ - (2592√35) (72 – 180 +0²)0³(—–—–) (²)²(e−2) απ' 2Zr where σ = naoarrow_forward
- Self-test 7B.3 As remarked in Self-test 7B.2, the normalized wavefunction of the next higher energy level of the electron in this model of the nanotube is (2/L)1/2 sin(2nx/L). What is the probability of L/2? finding the electron between x = L/4 and x = Answer: 0.25arrow_forwardAssume that for ¹H35 Cl molecule the rotational quantum number J is 11 and vibrational quantum number n = 0. The isotopic mass of ¹H atom is 1.0078 amu and the isotopic mass of 35 C1 atom is 34.9688 amu, k = 516 N · m¯¹, and x = 127.5 pm. Part E Calculate the period for vibration. Express your answer in seconds to three significant figures. Tvibrational = Part F Submit Previous Answers 1.12x10-14 s Correct Correct answer is shown. Your answer 1.1181.10-¹4 = 1.1181x10-14s was either rounded differently or used a different number of significant figures than required for this part. Calculate the period for rotation. Express your answer in seconds to four significant figures. Trotational = ΑΣΦ W ? Sarrow_forwardWhat is (a) the energy. (b) the speed of an electron that has been ejected from an orbital of ionization energy 10.0 eV by a photon of radiation of wavelength 110 nm?arrow_forward
- What is the threshold frequency ν0ν0nu_0 of cesium? Note that 1 eV (electron volt)=1.60×10−19 J.arrow_forwardA normalized wavefunction for a particle confined between 0 and L in the x direction is ψ = (2/L)1/2 sin(πx/L). Suppose that L = 10.0 nm. Calculate the probability that the particle is (a) between x = 4.95 nm and 5.05 nm, (b) between x = 1.95 nm and 2.05 nm, (c) between x = 9.90 nm and 10.00 nm, (d) between x = 5.00 nm and 10.00 nm.arrow_forwardIn the octatetraene (C8H10) molecule, what should be the length of the electromagnetic wave required to excite a π electron from the top filled level to the bottom empty level? The length of the molecule can be taken as 9.5 Å. Compare your value with the experimental value λ4.5 = 3020 Å and discuss whether the particle-in-a-box problem is a good approximation.arrow_forward
- P7B.8 A normalized wavefunction for a particle confined between 0 and L in the x direction, and between 0 and L in the y direction (that is, to a square of side L) is y = (2/L) sin(Tx/ L) sin(Ty/L). The probability of finding the particle between x, and x, along x, and between y, and y, along y is P= "w°dxdy Calculate the probability that the particle is: (a) between x = 0 and x = L/2, y = O and y = L/2 (i.e. in the bottom left-hand quarter of the square); (b) between x = L/4 and x = 3L/4, y = L/4 and y = 3L/4 (i.e. a square of side L/2 centred on x = y = L/2).arrow_forwardCalculate the wavelength of the green line in the visible spectrum of excited H atoms.arrow_forward(i) What do you understand by the dual nature of light? Explain clearly in few sentences. (ii)What is the difference between an emission and an absorption spectra? (iii) What is meant by Heisenberg uncertainty principle? Explain clearly in as simple a language as possible. (iv)What are the quantum numbers? How many are there ? What are their symbols and what do they signify? (v)What do you mean by periodic properties? What are the different trends seen in a periodic table and how can you explain them in at least two to three simple sentences for each of them?arrow_forward
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