Introductory Chemistry (5th Edition) (Standalone Book)
5th Edition
ISBN: 9780321910295
Author: Nivaldo J. Tro
Publisher: PEARSON
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Chapter 4, Problem 7E
Is matter usually charge-neutral? How would be different if it were not change-neutral?
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A sample of compound X (a clear, colorless, combustible liquid with a noticeable odor) is analyzed and found to contain 14.13 g carbon and 2.96 g hydrogen. A sample of compound Y (a clear, colorless, combustible liquid with a noticeable odor that is slightly different from X’s odor) is analyzed and found to contain 19.91 g carbon and 3.34 g hydrogen. Are these data an example of the law of definite proportions, the law of multiple proportions, or neither? What do these data tell you about substances X and Y?
The mass of a neutron is 1.6749×10−24 gg , and the mass of a proton is 1.6726×10−24 gg . What is the total mass of a neutron and a proton?
(1. On the second floor of Kent Laboratory a chemistry student in 111B finds
that 15.20 g of nitrogen will react with 17.37 g, 34.74 g, or 43.43 g of
oxygen to form three different compounds: (a) Calculate the ratio of the
mass of oxygen to the mass of nitrogen for each compound and (b) Explain
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Chapter 4 Solutions
Introductory Chemistry (5th Edition) (Standalone Book)
Ch. 4 - Q1. Which statement is not part of Dalton’s...Ch. 4 - Q2. Which statement best summarizes the nuclear...Ch. 4 - Q3. An ion composed of which of these particles...Ch. 4 - Which element is a maingroup metal with an even...Ch. 4 - Which element is a halo0gen? a. Ne b. O c. Ca d. ICh. 4 - Prob. 6SAQCh. 4 - Q7. Which element is a row 4 noble gas?
a. Ne
b....Ch. 4 - How many element does the predictable (most...Ch. 4 - Q9. How many neutrons does the Fe-56 isotope...Ch. 4 - Q10. Determine the number of protons, neutrons,...
Ch. 4 - Q11. What is the charge of the Cr ion that...Ch. 4 - An element has four naturally occurring isotopes;...Ch. 4 - What did Democritus contribute to our modern...Ch. 4 - 2. What are three man ideas in Dalton’s atomic...Ch. 4 - Describe Rutherfords gold foil experiment and the...Ch. 4 - What are the main ideas in the nuclear theory of...Ch. 4 - List the three subatomic particles and their...Ch. 4 - What is electrical charge?Ch. 4 - Is matter usually charge-neutral? How would be...Ch. 4 - 8. What does the atomic number of an element...Ch. 4 - What is a chemical symbol?Ch. 4 - Prob. 10ECh. 4 - What Dmitri Mendeleevs main contribution to our...Ch. 4 - What is the man idea in the periodic law?Ch. 4 - How is the periodic table organized?Ch. 4 - Prob. 14ECh. 4 - Prob. 15ECh. 4 - Prob. 16ECh. 4 - Prob. 17ECh. 4 - Locate each group of elements on the periodic...Ch. 4 - 19. What is an ion?
Ch. 4 - Prob. 20ECh. 4 - 21. Locate each group on the periodic table and...Ch. 4 - 22. What are isotopes?
Ch. 4 - Prob. 23ECh. 4 - Prob. 24ECh. 4 - What notations are commonly used to specify...Ch. 4 - What is the atomic mass of an element?Ch. 4 - 27. Which statement are inconsistent with Dalton’s...Ch. 4 - Which statements are consistent with Daltons...Ch. 4 - Which statements are inconsistent with Rutherfords...Ch. 4 - 30. Which statement are consistent with...Ch. 4 - Prob. 31ECh. 4 - 32. Some of the alpha particles used in...Ch. 4 - 33. Which statement about electrons is true?
a....Ch. 4 - Which statements about neutrons are...Ch. 4 - 35. Which statement about protons is true?
a....Ch. 4 - Prob. 36ECh. 4 - 37. How many electrons would it take to equal the...Ch. 4 - A helium nucleus has two has two neutrons. How...Ch. 4 - Prob. 39ECh. 4 - 40. What mass of protons is required to neutralize...Ch. 4 - Prob. 41ECh. 4 - Prob. 42ECh. 4 - Prob. 43ECh. 4 - How many protons are in the nucleus of an atom of...Ch. 4 - 45. List the symbol and atomic number of each...Ch. 4 - 46. List the symbol and atomic number of each...Ch. 4 - List the name and the atomic number of each...Ch. 4 - List the name and the atomic number of each...Ch. 4 - Fill in the blanks to complete the table. Element...Ch. 4 - Fill in the blanks to complete the table. Element...Ch. 4 - Classify each element as a metal, nonmetal, or...Ch. 4 - Classify each element as a metal, nonmetal, or...Ch. 4 - Which elements would you expect to lose electrons...Ch. 4 - 54. Which elements would you expect to gain...Ch. 4 - 55. Which elements are main group elements?
a....Ch. 4 - Which elements are not main-group elements? a. AI...Ch. 4 - 57. Which elements are alkaline earth metals?
a....Ch. 4 - Which elements are alkaline earth metal? a....Ch. 4 - 59. Which elements are alkali metals?
a. barium
b....Ch. 4 - Which elements are alkali metals? a. scandium b....Ch. 4 - Classify each element as a halogen, a noble gas,...Ch. 4 - Prob. 62ECh. 4 - 63. To what group number does each element...Ch. 4 - Prob. 64ECh. 4 - Which element do you expect to be most like...Ch. 4 - Which element do you expect to be most like...Ch. 4 - Which pair of elements do you expect to be most...Ch. 4 - Prob. 68ECh. 4 - 69. Which element is a main – group nonmetal?
a....Ch. 4 - Prob. 70ECh. 4 - Prob. 71ECh. 4 - Prob. 72ECh. 4 - Prob. 73ECh. 4 - Prob. 74ECh. 4 - Prob. 75ECh. 4 - Prob. 76ECh. 4 - Prob. 77ECh. 4 - 78. Determine the number of protons and electrons...Ch. 4 - Prob. 79ECh. 4 - Determine whether each statement is true or false....Ch. 4 - Predict the ion formed by each element. a. Rb b. K...Ch. 4 - 82. Predict ion formed by each element.
a. F
b....Ch. 4 - Predict how many electrons each element will most...Ch. 4 - Predict how many electrons each element will most...Ch. 4 - 85. Fill in the blanks to compele the...Ch. 4 - Fill in the blacks to complete the table. Symbol...Ch. 4 - Prob. 87ECh. 4 - 88. How many neutrons are in an atom each atomic...Ch. 4 - 89. Write isotopic symbols in the form for each...Ch. 4 - Write isotopic symbol in the form X-A (for...Ch. 4 - Write the symbol for each isotope in the form XZA....Ch. 4 - Write the symbol for each isotope in the form XZA....Ch. 4 - 93. Determine the number of protons and neutrons...Ch. 4 - Prob. 94ECh. 4 - Carbon 14, present within living organisms and...Ch. 4 - Plutonium-239 is used in nuclear bombs. Determine...Ch. 4 - Rubidium has two naturally occurring isotopes:...Ch. 4 - 98. Silicon has three naturally occurring...Ch. 4 - Bromine has two naturally occurring isotopes...Ch. 4 - Silver has two naturally occurring isotopes...Ch. 4 - 101. An element has two naturally occurring...Ch. 4 - Copper has two naturally occurring isotopes. Cu-63...Ch. 4 - Electrical charge is sometimes reported in...Ch. 4 - 104. How many excess protons are in a charged...Ch. 4 - 105. The hydrogen atom contains 1 proton 1...Ch. 4 - 106. Carbon-12 contains 6 protons and 6 neutrons....Ch. 4 - Prob. 107ECh. 4 - 108. Determine the number of protons and neutrons...Ch. 4 - Fill in the blanks to complete the table. Symbol Z...Ch. 4 - 110. Fill in the blanks to complete the...Ch. 4 - Prob. 112ECh. 4 - Chapter 1 describes the difference between...Ch. 4 - 114. Chapter1 describes the difference between...Ch. 4 - The atomic mass of fluorine is 19. 00 amu, and all...Ch. 4 - 116. The atomic mass of germanium is 72.61 amu. Is...Ch. 4 - Prob. 117ECh. 4 - Gallium has only two naturally occurring isotopes,...Ch. 4 - 119. The figure shown here is a representation of...Ch. 4 - 120. Neutron stars are believed to be composed of...Ch. 4 - 121. Complete the following...Ch. 4 - Prob. 122ECh. 4 - Prob. 123ECh. 4 - Prob. 124E
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- In 1886 Eugene Goldstein observed positively charged particles moving in the opposite direction to electrons in a cathode ray tube (illustrated below). From their mass, he concluded that these particles were formed from residual gas in the tube. For example, if the cathode ray tube contained helium, the canal rays consisted of He+ ions. Describe a process that could lead to these ions. Canal rays. In 1886, Eugene Goldstein detected a stream of particles traveling in the direction opposite to that of the negatively charged cathode rays (electrons). He called this stream of positive particles "canal rays:"arrow_forwardIn a reproduction of the Millikan oil-drop experiment, a student obtains the following values for the charges on nine different oil droplets. (a) Based on these data alone, what is your best estimate of the number of electrons on each of the above droplets? (Hint: Begin by considering differences in charges between adjacent data points, and see into what groups these are categorized.) (b) Based on these data alone, what is your best estimate of the charge on the electron? (c) Is it conceivable that the actual charge is half the charge you calculated in (b)? What evidence would help you decide one way or the other?arrow_forwardConstant Composition of Compounds Two samples of sugar are decomposed into their constituent elements. One sample of sugar produces 18.0 g carbon, 3.0 g hydrogen, and 24.0 g oxygen; the other sample produces 24.0 g carbon, 4.0 g hydrogen, and 32.0 g oxygen. Find the ratio of carbon to hydrogen and the ratio of oxygen to hydrogen for each of the samples, and show they are consistent with the law of constant composition.arrow_forward
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