 # Dhamnekar Win,odd

Senior Members

32

## Profile Information

• Favorite Area of Science
Chemistry, Mathematics, Physics, Statistics , Quantitative finance

## Recent Profile Visitors

The recent visitors block is disabled and is not being shown to other users.

## Dhamnekar Win,odd's Achievements 1

### Reputation

1. In the above second question, $\nabla r , \hbar$ means gradient r (position vector) and reduced Plank's constant respectively.
2. Momentum is used to sense the amount of force applied to a moving object. With the help of Momentum, you can know the nature of the applied force on an object. Momentum is usually represented by the product of the mass and velocity of a moving object. But in this case of quantum mechanics, the equation of momentum will be different. How is this computed? How is this momentum computed in Quantum mechanics?
3. There is typographical error in the above question. Please read ' Is $Ca^{19+}$ one electron atom? '
4. Was the above question correctly stated and correctly answered? In $Ca^{19+}$, how many electron shells are there? answer is n=1,2,3,4 Then in ground state how can we found its valence electron in 6th shell or n=6? Is $Ca^{19+}$ one lectron atom?
5. An x-ray photoelectron spectroscopy experiment with an unidentified element, X, displays an emission spectrum with four distinct kinetic energies: $5.9 \times 10^{-17} J, 2.53 \times 10^{-18} J,$ $2.59 \times 10^{-20} J, 2.67 \times 10^{-20} J$ (Assume the incident light has sufficient energy to eject any electron in the atom.) (a)Name all of the possible ground state atoms that could yield this spectrum. (b)Calculate the binding energy of an electron in the 2p orbital of element X if the x-rays used for the spectroscopy experiment had an energy of $2.68 \times 10^{-16} J$ (c)Consider both the filled and unfilled orbitals of element X. Determine the number of: (1) total nodes in a 4d orbital (2)angular nodes in the $2p_y$ orbital (3)degenerate 5p orbitals How to answer all these questions?
6. How to prove (7.1)? How can we use the following two expansion formulas of CDF of normal distribution to prove (7.1) lemma?
7. Can I ask here statistics question? If yes, under which forum?
8. For additional information, refer to the following table:
9. ## In Daniell cell, anode has higher reduction potential and cathode has lower reduction potential

10. Answer to d) 1)∆H = 17.4 kJ/mol 2)∆H = 8.7 kJ/mol 3)∆H= 4.35 kJ/mol Answer to e) Mechanism for this reaction is $1)N_2 + 2 O_2 \rightarrow 2 NO_2 \Delta H^\circ_f = 66.4 kJ/mol$ $2) N_2O_4 \rightarrow N_2 + 2 O_2 \Delta H^\circ_f = -9.16 kJ/mol$
11. I realized my mistake. The answer computed for b) is k=-0.4. But how to answer d, e ,f ,g ,h and i? I am working on all these questions. Any chemistry help from the member of this science(Chemistry) forum will be accepted.
12. How to answer all these questions? Are these above answers correct? Answers to remaining questions will be provided very soon.
13. $2H_2+C_2H_2 \rightarrow C_2H_6$ is first order with respect to $H_2$ and zero order with respect to ethyne and the rate law is $Rate=k[H_2],k=\frac{rate}{[H2]}=\frac{1.0 \times 10^{−4}M/min}{0.1M} =1×10^{−3}min^{−1}$
14. Now, here is the final correct answer provided to me by one great expert mathematician from UK (United Kingdom). That's it.
×