Introductory Chemistry, Books a la Carte Plus MasteringChemistry with eText -- Access Card Package (5th Edition)
5th Edition
ISBN: 9780321934604
Author: Nivaldo J. Tro
Publisher: PEARSON
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Textbook Question
Chapter 9, Problem 11E
Why do microwave ovens heat food but tend not to heat the dish the food is on?
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2) (4 pt) After the reaction was completed, the student collected the following data. Crude
product data is the data collected after the reaction is finished, but before the product
is purified. "Pure" product data is the data collected after attempted purification using
recrystallization.
Student B's data:
Crude product data
"Pure"
product data
after
recrystallization
Crude mass: 0.93 g grey solid
Crude mp: 96-106 °C
Crude % yield:
Pure mass: 0.39 g white solid
Pure mp: 111-113 °C
Pure % yield:
a) Calculate the crude and pure percent yields for the student's reaction.
b) Summarize what is indicated by the crude and pure melting points.
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Chapter 9 Solutions
Introductory Chemistry, Books a la Carte Plus MasteringChemistry with eText -- Access Card Package (5th Edition)
Ch. 9 - Q1. Which set of wavelengths for light are...Ch. 9 - Which of the listed types of electromagnetic...Ch. 9 - Q3. Which electron transition in the Bohr model...Ch. 9 - What is the electron configuration of arsenic...Ch. 9 - Which orbital diagram corresponds to phosphorus...Ch. 9 - Q6. How many valence electrons does tellurium (Te)...Ch. 9 - Q7. The element sulfur forms an ion with what...Ch. 9 - Order the elements Sr, Ca, and Se in order of...Ch. 9 - Which of the listed elements has the highest...Ch. 9 - Q10. Which of the listed elements is most...
Ch. 9 - Which property decreases as you move down a column...Ch. 9 - Q12. When aluminum forms an ion, it loses...Ch. 9 - 1. When were the Bohr model the quantum-mechanical...Ch. 9 - 2. What is light? How fast does light travel?
Ch. 9 - 3. What is white light? Colored light?
Ch. 9 - Explain in terms of absorbed and reflected light,...Ch. 9 - What is the relationship between the wavelength of...Ch. 9 - Prob. 6ECh. 9 - How are X-rays used?Ch. 9 - Why should excess exposure to gamma rays and...Ch. 9 - Why should excess exposure to ultraviolet light be...Ch. 9 - What objects emit infrared light? What technology...Ch. 9 - Why do microwave ovens heat food but tend not to...Ch. 9 - 12 .What type of electromagnetic radiation is used...Ch. 9 - Describe the Bohr model for the hydrogen atom.Ch. 9 - 14. What is an emission spectrum? Use the Bohr...Ch. 9 - 15. Explain the difference between a Bohr orbit...Ch. 9 - 16. What is the difference between the ground...Ch. 9 - 17. Explain how the motion of an electron is...Ch. 9 - 18. Why do quantum-mechanical orbital have “fuzzy”...Ch. 9 - Prob. 19ECh. 9 - 20. List the quantum-mechanical orbitals through...Ch. 9 - Prob. 21ECh. 9 - Prob. 22ECh. 9 - Within an electron configuration. What do symbols...Ch. 9 - Explain the difference between valence electrons...Ch. 9 - Identify each block in the blank periodic table....Ch. 9 - Prob. 26ECh. 9 - Prob. 27ECh. 9 - Prob. 28ECh. 9 - Prob. 29ECh. 9 - How far does light travel in each time period? a....Ch. 9 - 31. Which type of electromagnetic radiation has...Ch. 9 - 32. Which type of electromagnetic radiation has...Ch. 9 - List the types of electromagnetic radiation in...Ch. 9 - List the types of electromagnetic radiation in...Ch. 9 - List two types of electromagnetic radiation with...Ch. 9 - List two types of electromagnetic radiation with...Ch. 9 - List these three types of radiationinfrared,...Ch. 9 - List these three types of electromagnetic...Ch. 9 - Prob. 39ECh. 9 - 40. In the Bohr model, what happens when an...Ch. 9 - 41. Two of the emission wavelengths in the...Ch. 9 - 42. Two of the emission wavelengths in the...Ch. 9 - 43. Sketch the 1s and 2p orbitals. How do the 2s...Ch. 9 - Sketch the 3d orbitals. How do the 4d orbitals...Ch. 9 - Which electron is, on average closer to the...Ch. 9 - 46. Which electron is, on average, farther from...Ch. 9 - 47. According to the quantum-mechanical model for...Ch. 9 - Prob. 48ECh. 9 - 49. Write full electron configuration for each...Ch. 9 - Prob. 50ECh. 9 - 51. Write full orbital diagrams and indicate the...Ch. 9 - Write full orbital diagrams and indicate the...Ch. 9 - Write electron configurations for each element....Ch. 9 - Write electron configurations for each element....Ch. 9 - Prob. 55ECh. 9 - Prob. 56ECh. 9 - Prob. 57ECh. 9 - 58. Write full electron configurations and...Ch. 9 - Write orbital diagrams for the valence electrons...Ch. 9 - 60. Write orbital diagrams for the valence...Ch. 9 - How many valence electrons are in each element? a....Ch. 9 - Prob. 62ECh. 9 - Prob. 63ECh. 9 - Prob. 64ECh. 9 - Prob. 65ECh. 9 - Use the periodic table to write electron...Ch. 9 - Use the periodic table to write electron...Ch. 9 - Prob. 68ECh. 9 - Prob. 69ECh. 9 - Prob. 70ECh. 9 - Prob. 71ECh. 9 - Prob. 72ECh. 9 - Name the element in the third period (row) of the...Ch. 9 - 74. Name the element in the fourth period of the...Ch. 9 - 75. Use the periodic table to identify the element...Ch. 9 - Prob. 76ECh. 9 - 77. Choose the element with the higher ionization...Ch. 9 - Choose the element with the higher ionization...Ch. 9 - Arrange the elements in order of increasing...Ch. 9 - Prob. 80ECh. 9 - 81. Choose the element with the larger atoms from...Ch. 9 - Choose the element with the larger atoms from each...Ch. 9 - Prob. 83ECh. 9 - Prob. 84ECh. 9 - 85. Choose the more metallic element from each...Ch. 9 - Choose the more metallic element from each pair....Ch. 9 - 87. Arrange these elements in order of increasing...Ch. 9 - Arrange these elements in order of decreasing...Ch. 9 - What is the maximum number of electrons that can...Ch. 9 - Prob. 90ECh. 9 - Use the electron configurations of the alkaline...Ch. 9 - Prob. 92ECh. 9 - Write the electron configuration for each ion....Ch. 9 - Write the electron configuration for each ion....Ch. 9 - Prob. 95ECh. 9 - 96. Examine Figure 4.14, which shows the elements...Ch. 9 - Prob. 97ECh. 9 - Identify what is wrong with each electron...Ch. 9 - Prob. 99ECh. 9 - Prob. 100ECh. 9 - Prob. 101ECh. 9 - Based on periodic trends, which one of these...Ch. 9 - When an electron makes a transition from n=3 to...Ch. 9 - Prob. 104ECh. 9 - The distance from the sun to Earth is 1.496108 km....Ch. 9 - Prob. 106ECh. 9 - In the beginning of this chapter, you learned that...Ch. 9 - 108. Niels Bohr said, “Anyone who is not shocked...Ch. 9 - 107. The wave nature of matter was first proposed...Ch. 9 - 108. The particle nature of light was first...Ch. 9 - Prob. 111ECh. 9 - When atoms lose more than one electron, the...Ch. 9 - 111. Excessive exposure to sunlight increases the...Ch. 9 - 112. The quantum-mechanical model, besides...Ch. 9 - Prob. 115ECh. 9 - 116. Using grammatically correct sentences,...
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