Chemistry questions?

Posted on 2015-11-17 07:05:00 in Chemistry by JAY

1. How much energy (in kJ) do 3.0 moles of photons, all with a wavelength of 675 nm, contain?

2. The de Broglie wavelength of an electron with a velocity of 7.40 × 106 m/s is _______ m. The mass of the electron is 9.11 × 10-28 g.

3. For a hydrogen atom, which electronic transition would result in the emission of a photon with the highest energy?

a) 5 p ? 3 s
b) 7 f ? 5 d
c) 3 s ? 4 p
d) 2 p ? 6 d

4. For hydrogen, what is the wavelength of the photon emitted when an electron drops from a 4d orbital to a 2p orbital in a hydrogen atom?

5. How many subshells are there in the shell with n = 2?

6. Designate the correct quantum numbers for 3s orbital.

7. Which statement is correct about orbital?

a) A p orbital can have six electrons.
b) An orbital can have maximum one electron.
c) An s orbital has a spherical shell shape.
d) All p orbitals have same orientation.

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