SMARTWORKS FOR CHEMISTRY: ATOMS FOCUSED
2nd Edition
ISBN: 9780393644777
Author: Gilbert
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Perform the following calculations and express the answer with the appropriate number of significant figures:
36. 73.62 + 112.9 40. (6.6262×10–34 ) × (2.998×108 ) / (2.54×10–9 )
37. 167.42 × 1.94 41. 9.27 × (4.987 − 4.962)
A thief plans to steal a gold sphere with a radius of 28.4 cm from a museum. If the gold has a density of 19.3 g/cm^3, what is the mass of the sphere in pounds? [The volume of a sphere is V=(4/3)πr^3]. Express your answer in pounds to 3 significant figures.
b) One sphere has a radius of 5.10 cm; another has a radius of 5.00 cm. What is the difference in
volume (in cubic centimeters) between the two spheres? Give the answer to the correct number
of significant figures. The volume of a sphere is (4/3)TTr³, where TT= 3.1416 and r is the radius.
Chapter 1 Solutions
SMARTWORKS FOR CHEMISTRY: ATOMS FOCUSED
Ch. 1 - Prob. 1.1VPCh. 1 - Prob. 1.2VPCh. 1 - Prob. 1.3VPCh. 1 - Prob. 1.4VPCh. 1 - Prob. 1.5VPCh. 1 - Prob. 1.6VPCh. 1 - Prob. 1.7QACh. 1 - Prob. 1.8QACh. 1 - Prob. 1.9QACh. 1 - Prob. 1.10QA
Ch. 1 - Prob. 1.11QACh. 1 - Prob. 1.12QACh. 1 - Prob. 1.13QACh. 1 - Prob. 1.14QACh. 1 - Prob. 1.15QACh. 1 - Prob. 1.16QACh. 1 - Prob. 1.17QACh. 1 - Prob. 1.18QACh. 1 - Prob. 1.19QACh. 1 - Prob. 1.20QACh. 1 - Prob. 1.21QACh. 1 - Prob. 1.22QACh. 1 - Prob. 1.23QACh. 1 - Prob. 1.24QACh. 1 - Prob. 1.25QACh. 1 - Prob. 1.26QACh. 1 - Prob. 1.27QACh. 1 - Prob. 1.28QACh. 1 - Prob. 1.29QACh. 1 - Prob. 1.30QACh. 1 - Prob. 1.31QACh. 1 - Prob. 1.32QACh. 1 - Prob. 1.33QACh. 1 - Prob. 1.34QACh. 1 - Prob. 1.35QACh. 1 - Prob. 1.36QACh. 1 - Prob. 1.37QACh. 1 - Prob. 1.38QACh. 1 - Prob. 1.39QACh. 1 - Prob. 1.40QACh. 1 - Prob. 1.41QACh. 1 - Prob. 1.42QACh. 1 - Prob. 1.43QACh. 1 - Prob. 1.44QACh. 1 - Prob. 1.45QACh. 1 - Prob. 1.46QACh. 1 - Prob. 1.47QACh. 1 - Prob. 1.48QACh. 1 - Prob. 1.49QACh. 1 - Prob. 1.50QACh. 1 - Prob. 1.51QACh. 1 - Prob. 1.52QACh. 1 - Prob. 1.53QACh. 1 - Prob. 1.54QACh. 1 - Prob. 1.55QACh. 1 - Prob. 1.56QACh. 1 - Prob. 1.57QACh. 1 - Prob. 1.58QACh. 1 - Prob. 1.59QACh. 1 - Prob. 1.60QACh. 1 - Prob. 1.61QACh. 1 - Prob. 1.62QACh. 1 - Prob. 1.63QACh. 1 - Prob. 1.64QACh. 1 - Prob. 1.65QACh. 1 - Prob. 1.66QACh. 1 - Prob. 1.67QACh. 1 - Prob. 1.68QACh. 1 - Prob. 1.69QACh. 1 - Prob. 1.70QACh. 1 - Prob. 1.71QACh. 1 - Prob. 1.72QACh. 1 - Prob. 1.73QACh. 1 - Prob. 1.74QACh. 1 - Prob. 1.75QACh. 1 - Prob. 1.76QACh. 1 - Prob. 1.77QACh. 1 - Prob. 1.78QACh. 1 - Prob. 1.79QACh. 1 - Prob. 1.80QACh. 1 - Prob. 1.81QACh. 1 - Prob. 1.82QACh. 1 - Prob. 1.83QACh. 1 - Prob. 1.84QACh. 1 - Prob. 1.85QACh. 1 - Prob. 1.86QACh. 1 - Prob. 1.87QACh. 1 - Prob. 1.88QACh. 1 - Prob. 1.89QACh. 1 - Prob. 1.90QACh. 1 - Prob. 1.91QACh. 1 - Prob. 1.92QACh. 1 - Prob. 1.93QACh. 1 - Prob. 1.94QACh. 1 - Prob. 1.95QACh. 1 - Prob. 1.96QACh. 1 - Prob. 1.97QACh. 1 - Prob. 1.98QACh. 1 - Prob. 1.99QACh. 1 - Prob. 1.100QACh. 1 - Prob. 1.101QACh. 1 - Prob. 1.102QACh. 1 - Prob. 1.103QACh. 1 - Prob. 1.104QACh. 1 - Prob. 1.105QACh. 1 - Prob. 1.106QACh. 1 - Prob. 1.107QACh. 1 - Prob. 1.108QA
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- 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.arrow_forwardExpress the measurements to the requested number of significant figures. (a) 96,485 J/C to three significant figures (b) 2.9979 g/cm3 to three significant figures (c) 0.0597 mL to one significant figure (d) 6.626 1034 kg to two significant figuresarrow_forwardOne year of world production of gold was 49.6 106 troy ounces. One troy ounce equals 31.10 g. What was the world production of gold in metric tons (106 g) for that year?arrow_forward
- Suppose a room is 18 m long, 15 m wide, and the distance from floor to ceiling is 2.9 m. What is the room’s volume in cubic meters? In cubic centimeters? In liters?arrow_forwardA sample of a bright blue mineral was weighed in air, then weighed again while suspended in water. An object is buoyed up by the mass of the fluid displaced by the object. In air, the mineral weighed 7.35 g; in water, it weighed 5.40 g. The densities of air and water are 1.205 g/L and 0.9982 g/cm3, respectively. What is the density of the mineral?arrow_forwardThe label on a bale of mulch indicates a volume of 1.45 ft3. The label also states that the mulch in the bale will cover an area of a garden 6 ft 6 ft to a depth of 1 in. Account for the discrepancy in the given volumes.arrow_forward
- For these questions, be sure to apply the rules for significant figures. a You are conducting an experiment where you need the volume of a box; you take the length, height, and width measurements and then multiply the values together to find the volume. You report the volume of the box as 0.310 m1. If two of your measurements were 0.7120 m and 0.52145 m, what was the other measurement? b If you were to add the two measurements from the first part of the problem to a third length measurement with the reported result of 1.509 m, what was the value of the third measurement?arrow_forwardA person weighed 15 pennies on a balance and recorded the following masses: 3.112 g 3.109 g 3.059 g 2.467 g 3.079 g 2.518 g 3.129 g 2.545 g 3.050 g 3.053 g 3.054 g 3.072 g 3.081 g 3.131 g 3.064 g Curious about the results, he looked at the dates on each penny. Two of the light pennies were minted in 1983 and one in 1982. The dates on the 12 heavier pennies ranged from 1970 to 1982. Two of the 12 heavier pennies were minted in 1982. a. Do you think the Bureau of the Mint changed the way it made pennies? Explain. b. The person calculated the average mass of the 12 heavy pennies. He expressed this average as 3.0828 g 0.0482 g. What is wrong with the numbers in this result, and how should the value be expressed?arrow_forwardExpress each answer with the correct significant digits, and the proper units AND write it in scientific notation number, units. Note: Input derived units as unit power, for example mm^2 represents mm? (2.456 x 10° Ibs - 8.34 x 10 Ibs)/1.22 x 10 in? x 10arrow_forward
- A student sets up the following equation to convert a measurement. (The ? stands for a number the student is going to calculate.) Fill in the missing part of this equation. (84. cm )· 0= ? m² 3 3arrow_forward8. 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?arrow_forwardV=(4/3)(pi)(r)^3, where r=19.136. What is the answer in correct significant figures?arrow_forward
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