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OWLv2 for Oxtoby/Gillis/Butler's Principles of Modern Chemistry, 8th Edition, [Instant Access], 1 term (6 months)
8th Edition
ISBN: 9781305271593
Author: David W. Oxtoby; H. Pat Gillis; Laurie J. Butler
Publisher: Cengage Learning US
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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.
Estimate the percentage of the total mass of a atom that is due to (a) electrons, (b) protons, and (c) neutrons by assuming that the mass of the atom is simply the sum of the masses of the appropriate numbers of subatomic particles. The mass of an electron is 0.00054858 amu, the mass of a proton is 1.0073 amu, and the mass of a neutron is 1.0087 amu.
Chapter 1 Solutions
OWLv2 for Oxtoby/Gillis/Butler's Principles of Modern Chemistry, 8th Edition, [Instant Access], 1 term (6 months)
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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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