21) ► problem set 1 (bschem1b) Measurement problems (A) TOu owe me ai1.39 tor aD ot tomatoes. Iney were a1.9 a pound. (b) There are 16 oz in I b () There are 7 cars in your driveway. 24. Which of the following statements use exact numbers? (a) The little girl weighs 74.3 Ih. (b) The boiling point of ethyl alcohol is 78°C. () The square root of 144 is 12. me
21) ► problem set 1 (bschem1b) Measurement problems (A) TOu owe me ai1.39 tor aD ot tomatoes. Iney were a1.9 a pound. (b) There are 16 oz in I b () There are 7 cars in your driveway. 24. Which of the following statements use exact numbers? (a) The little girl weighs 74.3 Ih. (b) The boiling point of ethyl alcohol is 78°C. () The square root of 144 is 12. me
Principles of Instrumental Analysis
7th Edition
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
ChapterA1: Evaluation Of Analytical Data
Section: Chapter Questions
Problem A1.3QAP
Related questions
Question
Transcribed Image Text:Q Search
...
O Measurement problems.docx
Close
Activity
Word | COL CHEM 1 (BS Chem 1B 2021) problem set 1 (bschem1b)
Measurement problems
EE Immersive Reader
O Open in Desktop App
E Print
4 Share
...
Chat
(a) Tou owe me S11.39 tor 5.7 ID or tomatoes. They were 51.99 a
pound.
(b) There are 16 oz in 1 lb.
(e) There are 7 cars in your driveway.
24. Which of the following statements use exact numbers?
(a) The little girl weighs 74.3 lb.
(b) The boiling point of ethyl alcohol is 78°C.
(c) The square root of 144 is 12.
25. A basketball game at the University of Connecticut's Gampel Pavilion
I nautical mile = 6076.12 ft
1 knot =1 nautical mi/h (exactly)
(a) How many miles are in one nautical mile?
(b) How many meters are in one nautical mile?
(c) A ship is traveling at a rate of 22 knots. Express the ship's speed in
miles per hour.
37. The unit of land measure in the English system is the acre, while that
in the metric system is the hectare. An acre is 4.356 X 10ʻ fº. A hectare is
ten thousand square meters. The town of Willington in Connecticut requires
a minimum area of 2.0 acres of land for a single-family dwelling. How many
hectares are required?
38. A lap in most tracks that use the English system is 0.25 mi (English
lap). In countries that use the metric system, a metric lap is 0.50 km. A
champion marathon runner covers a mile in about 5.0 min. How many min-
utes will the runner take to run an English lap at that speed? A metric lap?
39. An average adult has 6.0 Lof blood. The Red Cross usually takes I pint
of blood from each donor at a donation. What percentage (by volume) of a
person's blood does a blood donor give in one donation?
40. Cholesterol in blood is measured in milligrams of cholesterol per
deciliter of blood. If the unit of measurement were changed
cholesterol per milliliter of blood, what would a cholesterol reading of
Teams
Assignments
attracted 10,000 people. The building's interior floor space has an area of
1.71 x 10° f. Tickets to the game sold for $22.00. Senior citizens were given
a 20% discount. How many significant figures are there in each quantity?
(Your answer may include the words ambiguous and exact.)
26. A listing of a house for sale states that there are 5 bedrooms, 4000 f of
living area, and a living room with dimensions 17 x 18.5 ft. How many sig-
nificant figures are there in each quantity? (Your answer may include the
words ambiguous and exact.)
27. 1 Calculate the following to the correct number of significant figures.
Assume that all these numbers are measurements.
Calendar
Calls
(a) x= 17.2 + 65.18 - 2.4
Files
13.0217
(b) x =
to grams of
17.10
(c) x= (0.0061020)(2.0092)(1200.00)
185 mg/dL translate tot
41. Some states have reduced the legal limit for alcohol sobriety from
0.10% to 0.080% alcohol by volume in blood plasma.
(a) How many milliliters of alcohol are in 3.0 qt of blood plasma at the
lower legal limit?
(b) How many milliliters of alcohol are in 3.0 qt of blood plasma at the
higher legal limit?
(e) How much less alcohol is in 3.0 qt of blood plasma with the re-
duced sobriety level?
42. 1 The area of the 48 contiguous states is 3.02 x 10 mi. Assume
that these states are completely flat (no mountains and no valleys). What
volume of water, in liters, would cover these states with a rainfall of two
inches?
...
V(0.0034) + 4(1.000)(6.3 x 10-
(2)M1.000)
28. Calculate the following to the correct number of significant figures.
(d) x= 0.0034 +
(a) x= 128.5 + 2116.44-2244.47
(b) x = 0.004010 X 2.0000 x 50054
12.6 + 0.3 + 256.5
1003.7
(c) x
12.20 - V1.60 + 4(0.36)
(d) x
1.3409
29. The volume of a sphere is 4wr'r3, where r is the radius. One student
measured the radius to be 4.30 cm. Another measured the radius to be
00
4.33 cm. What is the difference in volume between the two measurements?
30. A cylinder has a circular cross section with a radius of 2.500 cm. What
is the volume of water in the cylinder with a measured height of 1.20 cm?
(The volume of a cylinder is wr'h, where r is the radius and h is the height.)
43. In Europe, nutritional information is given in kilojoules (k) instead of
nutritional calories (1 nutritional calorie = 1 kcal). A packet of soup has the
following nutritional information:
Apps
250 ml. of soup = 235 kl
Help
Page 1 of 3
100%
Give Feedback to Microsoft
11:35
P Type here to search
G 1)
W
34°C Haze
27/09/2021
近
Transcribed Image Text:Q Search
...
O Measurement problems.docx
Close
Activity
Word | COL CHEM 1 (BS Chem 1B 2021) problem set 1 (bschem1b)
Measurement problems
EP Immersive Reader
O Open in Desktop App
E Print
4 Share
...
Chat
44. In the old pharmaceutical system of measurements, masses were ex-
pressed in grains. There are 5.760 X 10 grains in 1 Ib. An old bottle of aspi-
rin lists 5 grains of active ingredient per tablet. How many milligrams of
active ingredient are there in the same tablet?
Unclassified
Teams
57. The solubility of lead nitrate at 100°C is 140.0 g/100 g water. A solution
at 100°C consists of 57.0 g of lead nitrate in 64.0 g of water. When the solu-
tion is cooled to 10°C, 25.0 g of lead nitrate crystallize out. What is the solu-
bility of lead nitrate in g/100 g water at 10°C?
58. The following data refer to the compound water. Classify each as a
chemical or a physical property.
(a) It is a colorless liquid at 25°C and 1 atm.
(b) It reacts with sodium to form hydrogen gas as one of the products.
(c) Its melting point is 0*C.
(d) It is insoluble in carbon tetrachloride.
59. The following data refer to the element phosphorus. Classify each as a
physical or a chemical property.
(a) It exists in several forms, for example, white, black, and red
phosphorus.
Assignments
Physical and Chemical Properties
45. 1 The cup is a measure of volume widely used in cookbooks. One cup
is equivalent to 225 ml. What is the density of clover honey (in grams per
milliliter) if three quarters of a cup has a mass of 252 g?
46. The volume occupied by egg whites from four "large" eggs is 112 ml.
The mass of the egg whites from these four eggs is 1.20 x 10' g. What is the
average density of the egg white from one "large" egg?
47. IA metal slug weighing 25.17 g is added to a flask with a volume of
59.7 ml. It is found that 43.7 gof methanol (d = 0.791 g/ml.) must be added
to the metal to fill the flask. What is the density of the metal?
Calendar
Calls
(b) It is a solid at 25°C and I atm.
(c) It is insoluble in water.
(d) It burns in chlorine to form phosphorus trichloride.
60. A cup of brewed coffee is made with about 9.0 g of ground coffee beans.
If a student brews three cups of gourmet coffee a day, how much does the
student spend on a year's supply of gourmet coffee that sells at $8.99/lb?
61. Lead has a density of 11.34 g/cm' and oxygen has a density of
1.31 X 10- g/em' at room temperature. How many cm' are occupied by 1 g
of lead? By 1 g of oxygen? Comment on the difference in volume for the two
48. I WEB A solid with an irregular shape and a mass of 11.33 g is added
to a graduated cylinder filled with water (d = 1.00 g/mL) to the 35.0-ml
Files
mark. After the solid sinks to the bottom, the water level is read to be at the
42.3-ml mark. What is the density of the solid?
49. A waterbed filled with water has the dimensions 8.0 ft x 7.0 ft x
0.75 ft. Taking the density of water to be 1.00 g/cm', how many kilograms of
water are required to fill the waterbed?
50. Wire is often sold in pound spools according to the wire gauge num-
ber. That number refers to the diameter of the wire. How many meters are in
a 10-lb spool of 12-gauge aluminum wire? A 12-gauge wire has a diameter
of 0.0808 in. Aluminum has a density of 2.70 g/cm. (V= wr')
51. Vinegar contains 5.00% acetic acid by mass and has a density of
1.01 g/ml. What mass (in grama) of acetic acid is present in 5.00 L of vinegar?
52. I Air is 21% oxygen by volume. Oxygen has a density of 1.31 g/L.
...
elements
62. - The dimensions of aluminum foil in a box for sale in supermarkets
are 66% yards by 12 inches. The mass of the foil is 0.83 kg. If its density is
2.70 g/cm', then what is the thickness of the foil in inches?
63. I The Kohinoor Diamond (d = 3.51 g/cm) is 108 carats. If one carat
has a mass of 2.00 x 10° mg, what is the mass of the Kohinoor Diamond in
pounds? What is the volume of the diamond in cubic inches?
64. A pycnometer is a device used to measure density. It weighs 20.455 g
empty and 31.486 g when filled with water (d = 1.00 g/cm'). Pieces of an
alloy are put into the empty, dry pycnometer. The mass of the alloy and pyc-
nometer is 28.695 g Water is added to the alloy to exactly fill the pycnome-
ter. The mass of the pycnometer, water, and alloy is 38.689 g. What is the
density of the alloy!
65. I Titanium is used in airplane bodies because it is strong and light. It
What is the volume, in liters, of a room that holds enough air to contain
55 kg of oxygen?
53. The solubility of barium hydroxide in water at 20°C is 1.85 g/100 g wa-
ter. A solution is made up of 256 mg in 35.0 g of water. Is the solution satu-
rated? If not, how much more barium hydroxide needs to be added to make
a saturated solution?
00
Apps
54. I Potassium sulfate has a solubility of 15 g/100 g water at 40°C. A so-
lution is prepared by adding 39.0 g of potassium sulfate to 225 g of water,
carefully heating the solution. and cooling it to 40°C. A homogeneous solu-
Help
Page 2 of 3
100%
Give Feedback to Microsoft
11:35
P Type here to search
34°C Haze
A TE G 4)
27/09/2021
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
Recommended textbooks for you
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning