Chapter 1, Problem 1.71AE

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.

What is the volume of liquid in the buret in the illustration? Note that the volumes on a buret, expressed in milliliters, are sequenced in the opposite direction of a graduated cylinder.

Ethylene glycol, C2H6O2, is an ingredient of automobile antifreeze. Its density is 1.11 g/cm3 at 20 C. If you need 500. mL of this liquid, what mass of the compound, in grams, is required?

Although the preferred SI unit of area is the square meter, land is often measured in the metric system in hectares (ha). One hectare is equal to 10,000 m2. In the English system, land is often measured in acres (1 acre = 160 rod2). Use the exact conversions and those given in Exercise 47 to calculate the following. a. 1 ha = __________ km2 b. The area of a 5.5-acre plot of land in hectares, square meters, and square kilometers c. A lot with dimensions 120 ft by 75 ft is to be sold for 6500. What is the price per acre? What is the price per hectare?

A typical laboratory beaker has a volume of 250. mL What is its volume in cubic centimeters? In liters? In cubic meters?In cubic decimeters?

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.

A small airplane takes on 312 L of fuel. If the density of the fuel is 0.821 g/ mL, what mass of fuel has the airplane taken on? Express your answer with the appropriate units.

Name the SI base units that are important in chemistry,and give the SI units for expressing the following:(a) length, (b) volume, (c) mass, (d) time, (e) temperature.