What are the answers to these Chemistry equation questions?

axelflame8

New member
I don't know what I'm doing wrong. I thought I had this stuff down in class but now I can't even get the same answer for the examples in the book! Please help!


1.What is the wavelength of light (in nm) having a frequency of 3.6 x 1014 s-1 (c = 3.00 x 108 m/s)?

2.What is the energy in kilojoules of a mole of photons associated with visible light of wavelength 714. nm (c = 3.00 × 108 m/s; h = 6.63 × 10-34 J s; NA = 6.022 × 1023 moles-1)?

3. Calculate the wavelength, in nanometers, of the light emitted by a hydrogen atom when its electron falls from the n = 6 to the n = 1 principal energy level. (c = 3.00 × 108 m/s; h = 6.63 × 10-34 J s).

4.Calculate the wavelength (in nm) of a neutron that has a velocity of 271. cm/s. (The mass of a neutron = 1.675 × 10-27 kg and h = 6.63 × 10-34 J s).
 
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