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Problem 62b
Complete the table. b. 1228 g/l _____g/ml _____kg/ml d. 2.554 mg/ml _____g/l _____mg/ml
Problem 63
Express the quantity 102,455 m in each unit. a. km b. Mm c. mm d. cm
Problem 64
Express the quantity 128.2 * 10 - 12 s in each unit. a. ms b. ns c. ps d. fs
Problem 65
How many 1-cm squares would it take to construct a square that is 1 m on each side?
- How many 1-cm cubes does it take to construct a cube that is 4 cm on each edge?
Problem 66
Problem 67
A new penny has a mass of 2.49 g and a volume of 0.349 cm3. Is the penny made of pure copper? Explain your answer.
Problem 68
A titanium bicycle frame displaces 0.314 L of water and has a mass of 1.41 kg. What is the density of the titanium in g/cm3?
Problem 69
Glycerol is a syrupy liquid often used in cosmetics and soaps. A 3.25 L sample of pure glycerol has a mass of 4.10×103 g. What is the density of glycerol in g/cm3?
Problem 70
A supposedly gold nugget displaces 19.3 mL of water and has a mass of 371 g. Could the nugget be made of gold?
Problem 71b
Ethylene glycol (antifreeze) has a density of 1.11 g>cm3. a. What is the mass in g of 226 mL of ethylene glycol? b. What is the volume in L of 4.2 kg of ethylene glycol?
Problem 73
A small airplane takes on 245 L of fuel. If the density of the fuel is 0.821 g/mL, what mass of fuel has the airplane taken on?
Problem 74
Human fat has a density of 0.918 g/cm3. How much volume (in cm3) is gained by a person who gains 10.0 lb of pure fat? the reliability of a Measurement and Significant Figures
Problem 78a
Read each measurement to the correct number of significant figures. Laboratory glassware should always be read from the bottom of the meniscus. Digital balances normally display mass to the correct number of significant figures for that particular balance.
Problem 78c
Read each measurement to the correct number of significant figures. Laboratory glassware should always be read from the bottom of the meniscus. Digital balances normally display mass to the correct number of significant figures for that particular balance.
Problem 79
For each number, underline the zeroes that are significant and draw an x through the zeroes that are not. a. 1,050,501 km b. 0.0020 m c. 0.000000000000002 s d. 0.001090 cm
Problem 82d
How many significant figures are in each number? d. 4,100 km
Problem 83a
Which numbers are exact (and therefore have an unlimited number of significant figures)? a. π = 3.14 c. EPA gas mileage rating of 26 miles per gallon d. 1 gross = 144
Problem 86
Round each number to three significant figures. a. 79,845.82 b. 1.5148937×107 c. 1.13499999995 d. 0.0000415389
Problem 87b
Calculate to the correct number of significant figures. b. 2.36 * 0.09870 * 0.0341
Problem 87d
Calculate to the correct number of significant figures. d. (1.128x105) / (2.7x102)
Problem 90a
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 92a
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 92d
Calculate to the correct number of significant figures. d. (3.14 × 2.4367) - 2.34
Problem 93
A flask containing 23.21 mL of a liquid weighs 146.3 g with the liquid in the flask and 131.8 g when empty. Calculate the density of the liquid in g>mL to the correct number of significant digits.
Problem 98a
Perform each unit conversion. a. 1.4 in to mm
Problem 98b
Perform each unit conversion. b. 116 ft to cm
Problem 98d
Perform each unit conversion. d. 815 yd to km
Problem 102
A gas can holds 25.0 gal of gasoline. Express this quantity in cm3.
Problem 103a
A house has an area of 195 m2. What is its area in each unit? a. km2 b. dm2 c. cm2
Problem 103b
A house has an area of 195 m2. What is its area in each unit? a. km2 b. dm2 c. cm2