Concept explainers
Ultrasonic waves have frequencies too high to be detected by the human ear, but they can be produced and detected by vibrating crystals. Calculate the wavelength of an ultrasonic wave of frequency
Want to see the full answer?
Check out a sample textbook solutionChapter 4 Solutions
Principles of Modern Chemistry
- Would the light from fireflies be considered an example of a fluorescence or a phosphorescence process?arrow_forward6.9 If a string of decorative lights includes bulbs with wave-lengths of 480, 580, and 700 mm, what are the frequencies of the lights? Use Figure 6.6 to determine which colors are in the set.arrow_forwardThe Lyman series of spectral lines for the H atom, in the ultraviolet region, arises from transitions from higher levels to n = 1. Calculate the frequency and wavelength of the least energetic line in this series.arrow_forward
- What is the physical explanation of the difference between a particle having the 3-D rotational wavefunction 3,2 and an identical particle having the wavefunction 3,2?arrow_forwardSodium atoms can be made to emit yellow light at a wavelength of 589.0 nm if they are heated sufficiently in a Bunsen flame. This light is the basis for the test for sodium in qualitative analysis. In the flame the atoms are excited by fast-moving molecules having an average energy per mole of 3RT/2. The temperature at which this occurs is 1500 degrees celsius. Why does it require that temperature?arrow_forwardA hydrogen atom rotates in three dimensions at a fixed distance of 100 pm from a fixed point. Ca lculate the energy of the level w ith rotational quantum number J = 1.arrow_forward
- A metal surface has a threshold energy of 225 kJ/mol. After being exposed to light with frequency 7.3 × 1014 Hz , with what velocity will electrons be ejected?arrow_forwardCalculate the frequiency of the light emitted by hydrogen atoms when they undergo transitions from n=5 to n=3? In what region of the electromagnetic spectrum does the radiation occur?arrow_forwardOrganic molecules (that contain carbon and other elements) are often probed using IR radiation. Certain bonds within the molecules vibrate at certain frequencies. If the carbon-oxygen bond in a molecule absorbs radiation of wavelength 9.6 μm, what frequency is that radiation?arrow_forward
- What is the energy in joules of one photon of microwave radiation with a wavelength 1.22 x 10 8 nm?arrow_forwardWhich of the following transitions are allowed in the electronic emission spectrum of a hydrogenic atom: (i) 2s → 1s, (ii) 2p → 1s, (iii) 3d → 2p?arrow_forwardCalculate the wavelength in hydrogen spectrum for the emission that results from the transition n = 3 to n = 2. The Rydberg constant for hydrogen, RH, is 1.09737 x 107 m-1.arrow_forward
- Principles of Modern ChemistryChemistryISBN:9781305079113Author:David W. Oxtoby, H. Pat Gillis, Laurie J. ButlerPublisher:Cengage LearningChemistry for Engineering StudentsChemistryISBN:9781337398909Author:Lawrence S. Brown, Tom HolmePublisher:Cengage LearningChemistry: Matter and ChangeChemistryISBN:9780078746376Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl WistromPublisher:Glencoe/McGraw-Hill School Pub Co
- Chemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningPhysical ChemistryChemistryISBN:9781133958437Author:Ball, David W. (david Warren), BAER, TomasPublisher:Wadsworth Cengage Learning,Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning