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  1. The energy for the n =2 level is -1/4 hR. The energy required to completely remove an electron from this level is 0-(-1/4 hR) = hR/4 = 1/4 x 2.18 x 10^-18 J .

    1 Answers · Science & Mathematics · 04/04/2007

  2. ...) = (-13.6 eV)(1.602×10^-19 J ) (0.024375) = - 5.31×10^-20 J Answer is negative because energy is lost. The lost energy is transformed into a photon of electromagnetic energy. To find the wavelength, we need Planck'...

    1 Answers · Science & Mathematics · 10/10/2017

  3. ... suflate N ? 32.Ethylene glycol A 33.Acetic acid A 34.Phenol ( j ) N 35.Propylene oxide N 36.Butadiene(k) N 37....

    2 Answers · Science & Mathematics · 08/06/2008

  4. ... n _b) = 1 - x_ a Here, we have that n _ a = n _b = 2, so x_ a = x_b = 1/2, and you are given the molar...the two components, so: S = 186.19 J /K + 229.49 J /K - (2mol)*(8.314 J ...

    1 Answers · Science & Mathematics · 27/10/2010

  5. a ) single replacement b) single replacement c) decomposition d) fermentation...replacement g) double replacement h) double replacement i) fermentation j ) synthesis k) synthesis l) decomposition m) synthesis n ) single replacement o) single replacement p) decomposition q) double...

    2 Answers · Science & Mathematics · 14/06/2013

  6. As Li2+ is a hydrogen-like ion, you can use the Rydberg formula...h Planck s constant (6.626 x 10E-34 J s); Z nuclear charge; n (1) & n (2) are the principal quantum numbers...

    3 Answers · Science & Mathematics · 17/11/2008

  7. ... away by the photon is 3.027 x 10^-19 J . ----- ----- ----- ----- ----- This photon from the n =3 ---> n =2 transition is the H-α photon, with a wavelength of 656 nm in the red region of the visible spectum...

    1 Answers · Science & Mathematics · 13/07/2011

  8. A ) E=hc/wavelength where h =6.620*10^-34 Js c=3*10^8 m/s E in joules B) E=h*frequency frequency...

    2 Answers · Science & Mathematics · 06/12/2013

  9. 1 G 2 A 3 N 4 B 5 E 6 J 7 F 8 D 9 I 10 K 11 L 12 C 13 H 14 M

    2 Answers · Science & Mathematics · 07/03/2010

  10. Well, it looks like water to me H to O (H2O). That's a good one.

    7 Answers · Science & Mathematics · 11/03/2007

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