Principles of Modern Chemistry
8th Edition
ISBN: 9781305079113
Author: David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher: Cengage Learning
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Chapter 1, Problem 7P
Nitrogen (N) and silicon (Si) form two binary compounds with the following compositions:
a) Compute the mass of silicon that combines with 1.0000 g of nitrogen in each case.
(b) Show that these compounds satisfy the law of multiple proportions. If the second compound has the formula
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1. The atoms of elements A (blue) and B
(orange) form two compounds shown here.
Do these compounds obey the law of
multiple proportions? Why? Why not?
2. Give the number of protons, neutrons, and electrons in each of the following species:
(a) 20 1,Na, (b) 2 1,Na, (c) "0, and (d) carbon-14.
3. One isotope of a metallic element has mass number 65 and has 35 neutrons in its nucleus. The
cation derived from the isotope has 28 electrons. Write the symbol for this cation.
The element oxygen has three naturally occurring isotopes, with 8,9, and 10 neutrons in
the nucleus, respectively. (a) write the full chemical symbols for these three isotopes. (b)
Describe the similarities and differences between the three kinds of atoms of oxygen.
When copper (Cu) and oxygen (O) combine, two different compounds are formed. The first compound contains 88.8% copper by mass, and the second compound contains 79.9% copper by mass. (Note: Assume a 100-gram sample of each compound.)
(a) Show that Cu and O combine with each other in conformity with the law of multiple proportions.
The small whole number ratio of the mass of Cu per gram of O in the first compound to the mass of Cu per gram of O in the second compound equals :1. This ratio indicates that Cu and O ---Select--- combine do not combine with each other in conformity with the law of multiple proportions.
(b) Determine the empirical formulas of the compounds.compound 1:
compound 2:
Chapter 1 Solutions
Principles of Modern Chemistry
Ch. 1 - Classify the following materials as substances or...Ch. 1 - Classify the following materials as substances or...Ch. 1 - A 17th-century chemist wrote of the “simple bodies...Ch. 1 - Since 1800, almost 200 sincere but erroneous...Ch. 1 - A sample of ascorbic acid (vitamin C) is...Ch. 1 - A sample of a compound synthesized and purified in...Ch. 1 - Nitrogen (N) and silicon (Si) form two binary...Ch. 1 - Iodine (I) and fluorine (F) form a series of...Ch. 1 - Vanadium (V) and oxygen (O) form a series of...Ch. 1 - Prob. 10P
Ch. 1 - Prob. 11PCh. 1 - Prob. 12PCh. 1 - Pure nitrogen dioxide (NO2) forms when dinitrogen...Ch. 1 - Gaseous methanol (CH3OH) reacts with oxygen (O2)...Ch. 1 - In J. J. Thompson’s experiment depicted in Figures...Ch. 1 - In the problem 15 above, what is vy , the...Ch. 1 - The natural abundances and isotopic masses of the...Ch. 1 - The natural abundances and isotopic masses of the...Ch. 1 - Prob. 19PCh. 1 - More than half of all the atoms in naturally...Ch. 1 - The isotope of plutonium used for nuclear fission...Ch. 1 - The last “missing” element from the first six...Ch. 1 - Prob. 23PCh. 1 - In 1982, the production of a single atom of...Ch. 1 - Prob. 25PCh. 1 - Prob. 26PCh. 1 - Compute the relative molecular masses of the...Ch. 1 - Prob. 28PCh. 1 - Suppose that a person counts out gold atoms at the...Ch. 1 - A gold atom has a diameter of 2.881010m . Suppose...Ch. 1 - The vitamin A molecule has the formula C20H30O ,...Ch. 1 - Arrange the following in order of increasing mass:...Ch. 1 - Mercury is traded by the “flask,” a unit that has...Ch. 1 - Gold costs $400 per troy ounce, and...Ch. 1 - Aluminum oxide (Al2O3) occurs in nature as a...Ch. 1 - Prob. 36PCh. 1 - Soft wood chips weighing 17.2 kg are placed in an...Ch. 1 - In a reproduction of the Millikan oil-drop...Ch. 1 - A rough estimate of the radius of a nucleus is...Ch. 1 - In a neutron star, gravity causes the electrons to...Ch. 1 - Prob. 41APCh. 1 - Naturally occurring rubidium (Rb) consists of two...Ch. 1 - A sample of a gaseous binary compound of boron and...
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- Two samples of different compounds of sulfur and oxygen have the following compositions. Show that the compounds follow the law of multiple proportions. What is the ratio of oxygen in the two compounds for a fixed amount of sulfur? Amount S Amount O Compound A l.210g 1.811 g Compound B 1.783 g 1.779 garrow_forwardThe element europium exists in nature as two isotopes: 151Eu has a mass of 150.9196 amu, and 153Eu has a mass of 152.9209 amu. The average atomic mass of europium is 151.96 amu. a. Calculate the relative abundance of the two europium isotopes. b. Graph each fractional abundance value as a y-axis value in association with its corresponding mass value on the x-axis. Starting from each x-axis value, where y = 0, draw a vertical line up to the fractional abundance value. The result will approximate the type of visual graph a mass spectrometer would yield for europium in the 150155 amu range.arrow_forwardSamples of compound X, Y, and Z are analyzed, with results shown here. Compound Description Mass of Carbon Mass of Hydrogen X clear, colorless, liquid with strong odor 1.776 g 0.148 g Y clear, colorless, liquid with strong odor 1.974 g 0.329 g Z clear, colorless, liquid with strong odor 7.812 g 0.651 g Do these data provide example(s) of the law of definite proportions, the law of multiple proportions, neither, or both? What do these data tell you about compounds X, Y, and Z?arrow_forward
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