Problema 43a
For each of the following pairs, which is the larger unit?
a. milligram or kilogram
Problema 43b
For each of the following pairs, which is the larger unit?
b. milliliter or microliter
Problema 43c
For each of the following pairs, which is the larger unit?
c. m or km
Problema 45
Why can two conversion factors be written for an equality such as 1 m = 100 cm?
Problema 47b
Write the equality and two conversion factors for each of the following pairs of units:
b. nanograms and grams
Problema 48c
Write the equality and two conversion factors for each of the following pairs of units:
a. centimeters and inches
Problema 54a
At Sandra's clinic, the medications in a. to d. are used. Write the equality and two conversion factors, and identify the numbers as exact or give the number of significant figures for each:
a. The label on a bottle reads 10 mg of furosemide per 1 mL.
Problema 54b
At Sandra's clinic, the medications in a. to d. are used. Write the equality and two conversion factors, and identify the numbers as exact or give the number of significant figures for each:
b. The Daily Value (DV) for selenium is 70. mcg.
Problema 55a
Write an equality and two conversion factors for each of the following medications:
a. 10 mg of Atarax per 5 mL of Atarax syrup
Problema 55b
Write an equality and two conversion factors for each of the following medications:
b. 0.25 g of Lanoxin per 1 tablet of Lanoxin
Problema 61a
Use metric conversion factors to solve each of the following problems:
b. A cooler has a volume of 5000 mL. What is the capacity of the cooler in liters?
Problema 61b
Use metric conversion factors to solve each of the following problems:
c. A hummingbird has a mass of 0.0055 kg. What is the mass, in grams, of the hummingbird?
Problema 61d
Use metric conversion factors to solve each of the following problems:
d. A balloon has a volume of 3500 cm3. What is the volume in liters?
Problema 62a
Use metric conversion factors to solve each of the following problems:
b. A glass of orange juice contains 3.2 dL of juice. How many milliliters of orange juice are in the glass?
Problema 62b
Use metric conversion factors to solve each of the following problems:
c. A package of chocolate instant pudding contains 2840 mg of sodium. How many grams of sodium are in the pudding?
Problema 62c
Use metric conversion factors to solve each of the following problems:
a. The Daily Value (DV) for phosphorus is 800 mg. How many grams of phosphorus are recommended?
Problema 62d
Use metric conversion factors to solve each of the following problems:
d. A jar contains 0.29 kg of olives. How many grams of olives are in the jar?
Problema 63a
Solve each of the following problems using one or more conversion factors:
c. An athlete has 15% body fat by mass. What is the weight of fat, in pounds, of a 74-kg athlete?
Problema 63b
Solve each of the following problems using one or more conversion factors:
b. What is the mass, in kilograms, of a person who weighs 175 lb?
Problema 63c
Solve each of the following problems using one or more conversion factors:
a. A container holds 0.500 qt of liquid. How many milliliters of lemonade will it hold?
Problema 63d
Solve each of the following problems using one or more conversion factors:
d. A plant fertilizer contains 15% nitrogen (N) by mass. In a container of soluble plant food, there are 10.0 oz of fertilizer. How many grams of nitrogen are in the container?
Problema 64a
Solve each of the following problems using one or more conversion factors:
a. Wine is 12% alcohol by volume. How many milliliters of alcohol are in a 0.750-L bottle of wine?
Problema 65a
Using conversion factors, solve each of the following clinical problems:
a. You have used 250 L of distilled water for a dialysis patient. How many gallons of water is that?
Problema 65c
Using conversion factors, solve each of the following clinical problems:
b. A patient needs 0.024 g of a sulfa drug. There are 8-mg tablets in stock. How many tablets should be given?
Problema 66a
Using conversion factors, solve each of the following problems:
a. Sandra has an order from the doctor to give 1.0 g of tetracycline every six hours to a patient. If the stock on hand is 500-mg tablets, how many will she need for one day’s treatment?
Problema 69a
Determine the density (g/mL) for each of the following:
a. A 20.0-mL sample of a salt solution has a mass of 24.0 g.
Problema 69b
Determine the density (g/mL) for each of the following:
b. A cube of butter weighs 0.250 lb and has a volume of 130.3 mL.
Problema 69c
Determine the density (g/mL) for each of the following:
c. A gem has a mass of 4.50 g. When the gem is placed in a graduated cylinder containing 12.00 mL of water, the water level rises to 13.45 mL.
Problema 71b
What is the density (g/mL) of each of the following samples?
b. A syrup is added to an empty container with a mass of 115.25 g. When 0.100 pt of syrup is added, the total mass of the container and syrup is 182.48 g.
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Problema 72a
What is the density (g/mL) of each of the following samples?
a. An ebony carving has a mass of 275 g and a volume of 207 cm3.
Ch.2 Chemistry and Measurements
