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?   Answer (30.0K)

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?   Answer (32.0K)

3. Suppose that a photon has energy of 5.0 x 10^-19 J. What is the frequency of this photon?   Answer (36.0K)

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?   Answer (49.0K)

5. Suppose that a photon has a wavelength of 700 nm (red). What is the frequency of this photon?   Answer (44.0K)

6. Calculate the energy in electron volts and in Joules for the photon in the previous problem.   Answer (34.0K)

7. A particle has a momentum of 2.00 x 10^-40kg m / s. Calculate its DeBroglie wavelength.   Answer (42.0K)

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?   Answer (46.0K)

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.   Answer (46.0K)

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 (38.0K)