DATA The density values in Table 12.1 are listed in increasing order. A chemistry student notices that the first four chemical elements that are included are also listed in order of increasing atomic mass . (a) See whether there is a simple relationship between density and atomic mass by plotting a graph of density (in g/cm 3 ) versus atomic mass for all eight elements in that table. (See Appendix D for their atomic masses in grams per mole.) (b) Can you draw a straight line or simple curve through the points to find a “simple" relationship? (c) Explain why “More massive atoms result in more dense solids” does not tell the whole story.
DATA The density values in Table 12.1 are listed in increasing order. A chemistry student notices that the first four chemical elements that are included are also listed in order of increasing atomic mass . (a) See whether there is a simple relationship between density and atomic mass by plotting a graph of density (in g/cm 3 ) versus atomic mass for all eight elements in that table. (See Appendix D for their atomic masses in grams per mole.) (b) Can you draw a straight line or simple curve through the points to find a “simple" relationship? (c) Explain why “More massive atoms result in more dense solids” does not tell the whole story.
DATA The density values in Table 12.1 are listed in increasing order. A chemistry student notices that the first four chemical elements that are included are also listed in order of increasing atomic mass. (a) See whether there is a simple relationship between density and atomic mass by plotting a graph of density (in g/cm3) versus atomic mass for all eight elements in that table. (See Appendix D for their atomic masses in grams per mole.) (b) Can you draw a straight line or simple curve through the points to find a “simple" relationship? (c) Explain why “More massive atoms result in more dense solids” does not tell the whole story.
An iron casting containing a number of cavities weighs 5.75E+3 N in air and 4.01E+3N in water. What is the total volume of all the
cavities in the casting? The density of iron (that is, a sample with no cavities) is 7.87 g/cm3.
Number
i
Units
One mole of Gold (Au) atom has a mass of 197 g. We know that the density of gold is 19.30 g/cm3 in room temperature. Using those numbers, answer the following questions:
a) What is the mass of a single gold atom in kg?
b) Assume that gold atoms sit in a perfect cubic crystal structure. Estimate the distance between two gold atoms in meters.
c) If we have a gold cube of 6 cm on each side, how many atoms can we fit along the edge of each side of the cube?
d) What would be the mass, in kilograms, of the gold cube we discussed in part (c) (measuring 6 cm on each side)?
An aluminum cylinder, with a mass of 51.5
grams, a diameter of 2.52 cm, and a height
of 3.75 cm, and its density equal (writing
the unit with the number):
Chapter 12 Solutions
University Physics with Modern Physics (14th Edition)
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