Chemistry: The Central Science (13th Edition)
13th Edition
ISBN: 9780321910417
Author: Theodore E. Brown, H. Eugene LeMay, Bruce E. Bursten, Catherine Murphy, Patrick Woodward, Matthew E. Stoltzfus
Publisher: PEARSON
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Textbook Question
Chapter 15, Problem 51E
Microwave ovens use microwave radiation to heat food. The energy of the microwaves is absorbed by water molecules in food and then transferred to other components of the food.
- Suppose that the microwave radiation has a wavelength of 11.2 cm. How many photons are required to heat 200 mL of coffee from 23 to 60 °C?
- Suppose the microwave's power is 900 W (1watt = 1 joule-second). How long would you have to heat the coffee in part (a)?
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Chemistry: The Central Science (13th Edition)
Ch. 15.2 - Molybdenum metal must absorb radiation with a...Ch. 15.2 - Titanium metal requires a photon with a minimum...Ch. 15.2 - Prob. 15.2.1PECh. 15.2 - Classify each of the following statements as...Ch. 15.3 - Prob. 15.3.1PECh. 15.3 -
6 38 Indicate whether energy is emitted or...Ch. 15.3 - Using Equation 6.5. calculate the energy of an...Ch. 15.3 - Prob. 15.4.2PECh. 15.4 - The visible emission lines observed by Balmer all...Ch. 15.4 - Prob. 15.5.2PE
Ch. 15.4 - Prob. 15.6.1PECh. 15.4 - The hydrogen atom can absorb light of wavelength...Ch. 15.5 - Prob. 15.7.1PECh. 15.5 - Prob. 15.7.2PECh. 15.5 - Use the de Brogue relationship to determine the...Ch. 15.5 - Prob. 15.8.2PECh. 15.6 - Neutron diffraction is an important technique for...Ch. 15.6 - The electron microscope has been widely used to...Ch. 15.6 - Prob. 15.10.1PECh. 15.6 - An AM radio station broadcasts at 1010 kHz, and...Ch. 15.6 - One type of sunburn occurs on exposure to UV light...Ch. 15.6 - Prob. 15.11.2PECh. 15.7 - Prob. 15.12.1PECh. 15.7 - A stellar object is emitting radiation at 3.55 mm....Ch. 15 - Prob. 1DECh. 15 - Prob. 1ECh. 15 - Identify the group of elements that corresponds to...Ch. 15 - Prob. 3ECh. 15 - Using the periodic table as a guide, write the...Ch. 15 -
Arrange Be, C, K, and Ca in order of increasing...Ch. 15 - Prob. 6ECh. 15 - Prob. 7ECh. 15 - Prob. 8ECh. 15 - Consider the isoelectronic ions F- and Na+. (a)...Ch. 15 - Prob. 10ECh. 15 - Prob. 11ECh. 15 - Prob. 12ECh. 15 - Give the values for n, I,and mlfor each orbital in...Ch. 15 - Prob. 14ECh. 15 - Prob. 15ECh. 15 - Which of the following represent impossible...Ch. 15 - For the table that follows, write which orbital...Ch. 15 - Sketch the shape and orientation of the following...Ch. 15 - Prob. 19ECh. 15 - Prob. 20ECh. 15 - Two possible electron configurations for an Li...Ch. 15 -
6.70 An experiment called the Stern—Gerlach...Ch. 15 - Prob. 23ECh. 15 - Prob. 24ECh. 15 - What are "valence electrons"? What are "core...Ch. 15 - For each element, indicate the number of valence...Ch. 15 - Write the condensed electron configurations for...Ch. 15 - Write the condensed electron configurations for...Ch. 15 - Identify the specific element that corresponds to...Ch. 15 - Prob. 30ECh. 15 - Prob. 31ECh. 15 - Prob. 32ECh. 15 - Prob. 33ECh. 15 - Prob. 34ECh. 15 - Prob. 35ECh. 15 - Prob. 36ECh. 15 - Prob. 37ECh. 15 - In an experiment to study the photoelectric...Ch. 15 - Prob. 39ECh. 15 - Prob. 40ECh. 15 - Prob. 41ECh. 15 - Prob. 42ECh. 15 - Prob. 43ECh. 15 - Prob. 44ECh. 15 - Prob. 45ECh. 15 - Prob. 46ECh. 15 - Prob. 47ECh. 15 - [6.100] The Chemistry and Life box in Section 6.7...Ch. 15 - Prob. 49ECh. 15 - [6.104] In the experiment shown schematically...Ch. 15 - Microwave ovens use microwave radiation to heat...Ch. 15 - Prob. 52ECh. 15 - The discovery of hafnium, element number 72,...Ch. 15 - Account for formation of the following series of...Ch. 15 - Prob. 55ECh. 15 - The two most common isotopes of uranium are 235U...Ch. 15 - Hypothetical elements X and Y form a molecule XY2,...Ch. 15 - Prob. 58ECh. 15 - Prob. 59ECh. 15 - Prob. 60ECh. 15 - Prob. 61ECh. 15 - Prob. 62ECh. 15 - Prob. 63ECh. 15 - Prob. 64ECh. 15 - Consider the following statements about first...Ch. 15 - Prob. 66ECh. 15 - Prob. 67ECh. 15 -
Write the electron configurations for (a) Ga3+...Ch. 15 - Prob. 69AECh. 15 - Prob. 70AECh. 15 - Prob. 71AECh. 15 - Prob. 72AECh. 15 - Prob. 73AECh. 15 - Prob. 74AECh. 15 - Consider the hypothetical reaction A(g) 2B(g). A...Ch. 15 - 15.76 As shown in Table 15.2, the equilibrium...Ch. 15 - Prob. 77AECh. 15 - Prob. 78AECh. 15 - Prob. 79AECh. 15 - Prob. 80AECh. 15 - Prob. 81AECh. 15 - Prob. 82AECh. 15 - Prob. 83AECh. 15 - Prob. 84AECh. 15 - Prob. 85AECh. 15 - Prob. 86AECh. 15 - Prob. 87AECh. 15 - Prob. 88AECh. 15 - Prob. 89AECh. 15 - Prob. 90AECh. 15 - Prob. 91AECh. 15 - Prob. 92AECh. 15 - Prob. 93IECh. 15 - Prob. 94IECh. 15 - Prob. 95IECh. 15 - Prob. 96IECh. 15 - Write the equilibrium-constant expression for the...Ch. 15 - In Section 11.5, we defined the vapor pressure of...Ch. 15 - Prob. 99IECh. 15 - Prob. 100IE
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- (a) Which color in the visible spectrum has the highest frequency? Which has the lowest frequency? (b) Is the wavelength of the radiation used in a microwave oven (2.45 GHz) longer or shorter than that from your favorite FM radio station (for example, 91.7 MHz)? (c) Are the wavelengths of x-rays longer or shorter than those of ultraviolet light? (d) Calculate the frequency of green light with a wavelength of 510. nm.arrow_forwardAn FM radio station broadcasts at a frequency of 101.3 MHz. What is the wavelength, in meters and nanometers, of this radiation?arrow_forwardInvestigating Energy Levels Consider the hypothetical atom X that has one electron like the H atom but has different energy levels. The energies of an electron in an X atom are described by the equation E=RHn3 where RH is the same as for hydrogen (2.179 1018 J). Answer the following questions, without calculating energy values. a How would the ground-state energy levels of X and H compare? b Would the energy of an electron in the n = 2 level of H be higher or lower than that of an electron in the n = 2 level of X? Explain your answer. c How do the spacings of the energy levels of X and H compare? d Which would involve the emission of a higher frequency of light, the transition of an electron in an H atom from the n = 5 to the n = 3 level or a similar transition in an X atom? e Which atom, X or H, would require more energy to completely remove its electron? f A photon corresponding to a particular frequency of blue light produces a transition from the n = 2 to the n = 5 level of a hydrogen atom. Could this photon produce the same transition (n = 12 to n = 5) in an atom of X? Explain.arrow_forward
- Ozone in the stratosphere absorbs ultraviolet light of wavelengths shorter than 320 nm, thus filtering out the most energetic radiation from sunlight. During this absorption, an ozone molecule absorbs a photon, which breaks an oxygen-oxygen bond, yielding an oxygen molecule and an oxygen atom: O3(g)+hvO2(g)+O(g) (Here, hv denotes a photon.) Suppose a flask of ozone is irradiated with a pulse of UV light of wavelength 275 nm. Assuming that each photon of this pulse that is absorbed breaks up one ozone molecule, calculate the energy absorbed per mole of O2 produced, giving the answer in kJ/mol.arrow_forwardOne type of solar radiation in the upper atmosphere has a frequency of 7.898 1014 Hz; another type has a frequency of 1.20 1015 Hz. (a) In what region of the electromagnetic spectrum does this solar radiation occur? (b) Which of the two types of radiation has the shorter wavelength? Explain your answer.arrow_forward6.101 Laser welding is a technique in which a tightly focused laser beam is used to deposit enough energy to weld metal parts together. Because the entire process can be automated, it is commonly used in many large-scale industries, including the manufacture of automobiles. In order to achieve the desired weld quality, the steel parts being joined must absorb energy at a rate of about 104 W/mm2. (Recall that 1 W = 1 J/s.) A particular laser welding system employs a Nd:YAG laser operating at a wavelength of 1.06m ; at this wavelength steel will absorb about 80% of the incident photons. If the laser beam is focused to illuminate a circular spot with a diameter of 0.02 inch, what is the minimum power (in watts) that the laser must emit to reach the 104 W/mm2 threshold? How many photons per second does this correspond to? (For simplicity, assume that the energy from the laser does not penetrate into the metal to any significant depth.)arrow_forward
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