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1. Hydrogen with an atomic weight of 1 combines
with oxygen with atomic weight of 16 to form water (H2O). What
is the ratio of the mass of oxygen to that of hydrogen that you would expect
to react completely in this reaction? 2. If 46 grams of sodium of atomic weight 23
react with 71 grams of chlorine to form salt (NaCl) what is the atomic weight
of Chlorine? 3. Suppose that a photon has energy of 5.0 x
10-19 J. What is the frequency of this photon? 4. Using the Rydberg formula, find the wavelength
of the spectral line for which m = 6 and n = 1. Would this line be visible
to the unaided eye? 5. Suppose that a photon has a wavelength of
700 nm (red). What is the frequency of this photon? 6. Calculate the energy in electron volts and
in Joules for the photon in the previous problem. 7. A particle has a momentum of 2.00 x 10-40kg
m / s. Calculate its DeBroglie wavelength. 8. If the momentum of a particle were known within
an uncertainty of Δ p = 5.0 x 10-20 kg m / s, what is the
uncertainty in its position? 9.Suppose you could measure the position of an
object within an uncertainty of Δ x = 0.000001 m. What is the minimum uncertainty
in the momentum of the object? Comment on your answer. 10. An electron in a hydrogen atom jumps from
one orbit to another for which the energy difference between the orbits is 4.00 x 10-19 J. What
is the frequency of the photon emitted in this transition? |
Answer
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