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Problem 82
Round each number to three significant figures. a. 79,845.82 b. 1.548937×107 c. 2.3499999995 d. 0.000045389
Problem 84a
Calculate to the correct number of significant figures. a. 89.3 × 77.0 × 0.08
Problem 84b
Calculate to the correct number of significant figures. b. (5.01×105) / (7.8×102)
Problem 84c
Calculate to the correct number of significant figures. c. 4.005 × 74 × 0.007
Problem 84d
Calculate to the correct number of significant figures. d. 453 ÷ 2.031
Problem 86a
Calculate to the correct number of significant figures. a. 0.004 + 0.09879 b. 1239.3 + 9.73 + 3.42 c. 2.4 - 1.777
Problem 86d
Calculate to the correct number of significant figures. d. 532 + 7.3 - 48.523
Problem 88a
Calculate to the correct number of significant figures. a. [(1.7×106) / (2.63×105)] + 7.33 b. (568.99 - 232.1) / 5.3
Problem 88c
Calculate to the correct number of significant figures. c. (9443 + 45 - 9.9) × 8.1 × 106
Problem 88d
Calculate to the correct number of significant figures. d. (3.14 × 2.4367) - 2.34
Problem 89
A flask containing 11.7 mL of a liquid weighs 132.8 g with the liquid in the flask and 124.1 g when empty. Calculate the density of the liquid in g/mL to the correct number of significant digits.
Problem 94a
Perform each unit conversion. a. 1.4 in to mm
Problem 94b
Perform each unit conversion. b. 116 ft to cm
Problem 94c
Perform each unit conversion. c. 1845 kg to lb
Problem 94d
Perform each unit conversion. d. 815 yd to km
Problem 95
A runner wants to run 10.0 km. Her running pace is 7.5 mi per hour. How many minutes must she run?
Problem 96
A cyclist rides at an average speed of 18 mi per hour. If she wants to bike 212 km, how long (in hours) must she ride?
Problem 97
A certain European automobile has a gas mileage of 17 km/L. What is the gas mileage in miles per gallon?
Problem 98
A gas can holds 5.0 gal of gasoline. Express this quantity in cm3.
Problem 99a
A house has an area of 195 m2. What is its area in each unit? a. km2 b. dm2 c. cm2
Problem 99b
A house has an area of 195 m2. What is its area in each unit? a. km2 b. dm2 c. cm2
Problem 99c
A house has an area of 195 m2. What is its area in each unit? a. km2 b. dm2 c. cm2
Problem 100c
A bedroom has a volume of 115 m3. What is its volume in each unit? a. km3 b. dm3 c. cm3
Problem 101
The average U.S. farm occupies 435 acres. How many square miles is this? (1 acre = 43,560 ft2, 1 mile = 5280 ft)
Problem 102
Total U.S. farmland occupies 954 million acres. How many square miles is this? (1 acre = 43,560 ft2, 1 mi = 5280 ft). Total U.S. land area is 3.537 million square miles. What percentage of U.S. land is farmland?
Problem 103
An acetaminophen suspension for infants contains 80 mg/0.80 mL suspension. The recommended dose is 15 mg/kg body weight. How many mL of this suspension should be given to an infant weighing 14 lb? (Assume two significant figures.)
Problem 104
An ibuprofen suspension for infants contains 100 mg/5.0 mL suspension. The recommended dose is 10 mg/kg body weight. How many mL of this suspension should be given to an infant weighing 18 lb? (Assume two significant figures.)
Problem 105
There are exactly 60 seconds in a minute, exactly 60 minutes in an hour, exactly 24 hours in a mean solar day, and 365.24 solar days in a solar year. How many seconds are in a solar year? Give your answer with the correct number of significant figures.
Problem 106
Determine the number of picoseconds in 2.0 hours.
Problem 107
Classify each property as intensive or extensive. a. volume b. boiling point c. temperature d. electrical conductivity e. energy