Chapter 1, Problem 1.45E

Gold leaf, which is used for many decorative purposes, is made by hammering pure gold into very thin sheets. Assuming that a sheet of gold leaf is 1.27 105 cm thick, how many square feet of gold leaf could be obtained from 28.35 g gold? The density of gold is 19.3 g/cm3.

A solution is prepared by dissolving table salt, sodium chloride, in water at room temperature. a Assuming there is no significant change in the volume of water during the preparation of the solution, how would the density of the solution compare to that of pure water? b If you were to boil the solution for several minutes and then allow it to cool to room temperature, how would the density of the solution compare to the density in part a? c If you took the solution prepared in part a and added more water, how would this affect the density of the solution?

A listing of a house for sale states that there are 5bedrooms, 4000 ft2 of living area, and a living room with dimensions 1718.5 ft. How many significant figures are there in each quantity? (Your answer may include the words ambiguous and exact.)

What is the difference in surface area between two circles, one of radius 7.98 cm, the other of radius 8.50 cm? The surface area of a circle of radius r is r2. Obtain the result to the correct number of significant figures.

In the area of nano-chemistry, particles defined as nanoparticles range in size from 1-2500 nm.  1 nm is equivalent to 1 × 10–9 m. If the size of the particles that make up a particular material is 1.23 × 10–8 cm, what is this size in nanometers?

What is the density of lithium metal in g/cm3, if a cube measuring 0.82 cm x 1.45 cm x 1.25 cm has a mass of 0.794 g?

8. Your calculator gives you the number 1761.2868 as the volume (in cm^ 3) of a box 2.0 ft by 6.5 cm by 1.75 în. Since this number should reflect the precision of the physical measurements, how many significant figures will you record for the volume of the box? What is the volume of the box?

The total amount of fresh water on earth is estimated to be 3.73 x 10^8 km^3. What is this volume In liters?

If a troy pound equals 12 troy ounces, and a troy ounce equals 31.1 grams, what is the mass in grams of a 3 troy pounds of silver?