Don't used Ai solution Question 12: The density of platinum (Pt) is 21.45 g/cm³. Assume that Pt atoms are cubes packed together withno empty space between them. Determine the edge length of one "cubic Pt atom" in pm.4

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Introductory Chemistry: An Active Learning Approach

6th Edition

ISBN:9781305079250

Author:Mark S. Cracolice, Ed Peters

Publisher:Mark S. Cracolice, Ed Peters

Chapter12: Chemical Bonding

Section: Chapter Questions

Problem 37E

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If we classify substances as ionic, molecular, macromolecular, or metallic, in which if any categories are all the members a. soluble in water? b. electrical conductors in the melt? c. insoluble in all common solvents? d. solids at room temperature?
On October 21, 1982, the Bureau of the Mint changed the composition of pennies (see Exercise 120). Instead of an alloy of 95% Cu and 5% Zn by mass, a core of 99.2% Zn and 0.8% Cu with a thin shell of copper was adopted. The overall composition of the new penny was 97.6% Zn and 2.4% Cu by mass. Does this account for the difference in mass among die pennies in Exercise 120? Assume the volume of the individual metals that make up each penny can be added together to give the overall volume of the penny, and assume each penny is the same size. (Density of Cu = 8.96 g/cm3; density of Zn = 7.14 g/cm3).
2.97 LDPE has a density in the range of 0.915—0.935 g/cm3, and HDPF has a density in the range of 0.940—0.965 g/cm3. You receive a small disk, 2.0 cm high with a 6.0-cm diameter, from a manufacturer of polyethylene, but its label is missing. You measure the mass of the disk and find that it is 53.8 g. Is the material HDPE or LDPE?
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1b.
One millimeter of water contains about 20 drops. One gram of water contains 3.34x10^22 molecules of water. The density of water is 1.00 g/mL. How many molecules of water are there in 1 drop?
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Question 12: The density of platinum (Pt) is 21.45 g/cm³. Assume that Pt atoms are cubes packed together with no empty space between them. Determine the edge length of one "cubic Pt atom" in pm. 4