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Chapter 18: Q. 8 (page 511)
An element in its solid phase has mass density 1750 kg/m3
and number density 4.3
The solution deals with the solid phase and the mass density of matter.
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How many atoms are in a 2.0 cm * 2.0 cm * 2.0 cm cube of
aluminum?
A -diameter cylinder that is long contains of oxygen gas at
a. How many moles of oxygen are in the cylinder?
b. How many oxygen molecules are in the cylinder?
c. What is the number density of the oxygen?
d. What is the reading of a pressure gauge attached to the tank
a. A sample of water vapour in an enclosed cylinder has an initial pressure of 500 Pa at an initial temperature of -0.01掳C. A piston squeezes the sample smaller and smaller, without limit. Describe what happens to the water as the squeezing progresses.
b. Repeat part a if the initial temperature is 0.03掳C warmer.
What volume of aluminum has the same number of atoms as 10 cm3 of mercury?
A brass ring with inner diameter 2.00 cm and outer diameter 3.00 cm needs to fit over a 2.00-cm-diameter steel rod, but at 20C the hole through the brass ring is 50 mm too small in diameter. To what temperature, inC, must the rod and ring be heated so that the ring just barely slips over the rod?
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