Chapter 2: Problem 54
Give an example of an ionic compound that does not contain a metal.
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Chapter 2: Problem 54
Give an example of an ionic compound that does not contain a metal.
These are the key concepts you need to understand to accurately answer the question.
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Get started for freeIn the second footnote on page 42 it was pointed out that mass and energy are alternate aspects of a single entity called mass-energy. The relationship between these two physical quantities is Einstein's equation, \(E=m c^{2}\), where \(E\) is energy, \(m\) is mass, and \(c\) is the speed of light. In a combustion experiment, it was found that \(12.096 \mathrm{~g}\) of hydrogen molecules combined with \(96.000 \mathrm{~g}\) of oxygen molecules to form water and released \(1.715 \times 10^{3} \mathrm{~kJ}\) of heat. Use Einstein's equation to calculate the corresponding mass change in this process, and comment on whether or not the law of conservation of mass holds for ordinary chemical processes.
The following phosphorus sulfides are known: \(\mathrm{P}_{4} \mathrm{~S}_{3}\), \(\mathrm{P}_{4} \mathrm{~S}_{7},\) and \(\mathrm{P}_{4} \mathrm{~S}_{10} .\) Do these compounds obey the law of multiple proportions?
Give an example of a case in which two molecules have different molecular formulas but the same empirical formula.
Write the appropriate symbol for each of the following isotopes: (a) \(Z=74, A=186\) (b) \(Z=80, A=201\) (c) \(Z=34, A=76 ;\) (d) \(Z=94, A=239 .\)
(a) Describe Rutherford's experiment and how the results revealed the nuclear structure of the atom. (b) Consider the \({ }^{23} \mathrm{Na}\) atom. Given that the radius and mass of the nucleus are \(3.04 \times 10^{-15} \mathrm{~m}\) and \(3.82 \times 10^{-23} \mathrm{~g},\) respectively, calculate the density of the nucleus in \(\mathrm{g} / \mathrm{cm}^{3}\). The radius of a \({ }^{23}\) Na atom is \(186 \mathrm{pm} .\) Calculate the density of the space occupied by the electrons outside the nucleus in the sodium atom. Do your results support Rutherford's model of an atom? [The volume of a sphere of radius \(r\) is \(\left.\frac{4}{5} \pi r^{3} .\right]\)
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