Question 1

A person weighs 150 lb, and the correct dosage of a drug is given as 1.50 mg per kilogram of body weight.How many milligrams of the drug should be given? (2.20 lb = 1 kg)

Accepted Answer

The answer of A person weighs 150 lb, and the...

Question 2

The SI prefixes milli and mega represent, respectively:

Accepted Answer

A)  106 and 10-6.
B)  10-3 and 106.
C)  103 and 10-6.
D)  10-3 and 109.
E)  10-6 and 10-3.F) None of the above
G) B) and D)

Question 3

An aluminum beverage can contains 12.0 fluid ounces of liquid. Express this volume in liters. (1 fl oz = 29.6 mL)

Accepted Answer

A)  4.07 * 10-2 L
B)  0.355 L
C)  0.407 L
D)  2.46 L
E)  3.55 * 102 LF) A) and D)
G) B) and D)

Question 4

What is the volume, in cubic centimeters, of a brick that is 4.0 in * 2.7 in * 8.0 in?

Accepted Answer

A)  5.3 cm3
B)  53 cm3
C)  87 cm3
D)  4.8 * 102 cm3
E)  1.4 * 103 cm3F) A) and B)
G) B) and C)

Question 5

How many significant figures does the result of the following operation contain? 8.52010 * 7.9

Accepted Answer

A)  2
B)  3
C)  4
D)  5
E)  6F) C) and D)
G) A) and B)

Question 6

A nanometer corresponds to:

Accepted Answer

A)  10-2 meters.
B)  10-3 meters.
C)  10-6 meters.
D)  10-9 meters.
E)  10-12 meters.F) B) and D)
G) A) and D)

Question 7

After carrying out the following operations, how many significant figures are appropriate to show in the result? (13.7 + 0.027)  /8.221

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5F) A) and C)
G) A) and D)

Question 8

One of the common intravenous fluids, called physiological saline, is a homogeneous mixture of NaCl in water. In this mixture, 0.89% of the mass is contributed by the NaCl. What mass of NaCl is found in 450.mL of physiological saline? (Given: density of physiological saline = 1.005 g/cm3)

Accepted Answer

A)  2.0 g
B)  4.0 g
C)  5.1 g
D)  508 g
E)  400 gF) A) and D)
G) B) and C)

Question 9

How many significant figures does the difference 218.7201 - 218.63 contain?

Accepted Answer

A)  1
B)  2
C)  3
D)  5
E)  7F) D) and E)
G) All of the above

Question 10

The radius of the Earth is approximately 6370 km. If one could dig down straight towards the center of the Earth, one would find that the outermost 2890 km (the crust and the mantle) has an average density of about 4.5 g/cm3. Farther down is the core. If the average density of the Earth is 5.5 g/cm3, what is the average density of the Earth's core? (Recall that the volume of a sphere is given by V = (4/3)  π\piπ r3.)

Accepted Answer

A)  11.g/cm3
B)  57.g/cm3
C)  6.2 g/cm3
D)  1.9 g/cm3
E)  not enough data is provided F) B) and E)
G) B) and C)

Question 11

A US barrel is 4.21 cubic feet. Express this volume in liters.

Accepted Answer

A)  3.99 * 10-5 L
B)  1.99 * 10-2 L
C)  19.9 L
D)  105 L
E)  119 LF) A) and C)
G) C) and E)

Question 12

All of the following are properties of sodium. Which one is a physical property of sodium?

Accepted Answer

A)  It is surface turns black when first exposed to air.
B)  It is a solid at 25 ∘\circ∘ C and changes to a liquid when heated to 98 ∘\circ∘ C.
C)  When placed in water it sizzles and a gas is formed.
D)  When placed in contact with chlorine it forms a compound that melts at 801 ∘\circ∘ C.
E)  Sodium is never found as the pure metal in nature. F) A) and B)
G) None of the above

Question 13

What are the common names for the three states of the compound water?

Accepted Answer

Ice, water...

Exam 1: Chemistry: The Study of Change

Correct Answer
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A US barrel is 4.21 cubic feet. Express this volume in liters.

Correct Answer
verified

What is the volume, in cubic centimeters, of a brick that is 4.0 in * 2.7 in * 8.0 in?

Correct Answer
verified

An aluminum beverage can contains 12.0 fluid ounces of liquid. Express this volume in liters. (1 fl oz = 29.6 mL)

Correct Answer
verified

What are the common names for the three states of the compound water?

Correct Answer
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Ice, water...
View Answer

All of the following are properties of sodium. Which one is a physical property of sodium?

Correct Answer
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A nanometer corresponds to:

Correct Answer
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A person weighs 150 lb, and the correct dosage of a drug is given as 1.50 mg per kilogram of body weight.How many milligrams of the drug should be given? (2.20 lb = 1 kg)

Correct Answer
verified

How many significant figures does the difference 218.7201 - 218.63 contain?

Correct Answer
verified

The SI prefixes milli and mega represent, respectively:

Correct Answer
verified

How many significant figures does the result of the following operation contain? 8.52010 * 7.9

Correct Answer
verified

One of the common intravenous fluids, called physiological saline, is a homogeneous mixture of NaCl in water. In this mixture, 0.89% of the mass is contributed by the NaCl. What mass of NaCl is found in 450.mL of physiological saline? (Given: density of physiological saline = 1.005 g/cm³)

Correct Answer
verified

After carrying out the following operations, how many significant figures are appropriate to show in the result? (13.7 + 0.027) /8.221

Correct Answer
verified

Exam 1: Chemistry: The Study of Change

Correct AnswerverifiedShow Answer

A US barrel is 4.21 cubic feet. Express this volume in liters.

Correct AnswerverifiedShow Answer

What is the volume, in cubic centimeters, of a brick that is 4.0 in * 2.7 in * 8.0 in?

Correct AnswerverifiedShow Answer

An aluminum beverage can contains 12.0 fluid ounces of liquid. Express this volume in liters. (1 fl oz = 29.6 mL)

Correct AnswerverifiedShow Answer

What are the common names for the three states of the compound water?

Correct AnswerverifiedIce, water...View AnswerShow Answer

All of the following are properties of sodium. Which one is a physical property of sodium?

Correct AnswerverifiedShow Answer

A nanometer corresponds to:

Correct AnswerverifiedShow Answer

A person weighs 150 lb, and the correct dosage of a drug is given as 1.50 mg per kilogram of body weight.How many milligrams of the drug should be given? (2.20 lb = 1 kg)

Correct AnswerverifiedShow Answer

How many significant figures does the difference 218.7201 - 218.63 contain?

Correct AnswerverifiedShow Answer

The SI prefixes milli and mega represent, respectively:

Correct AnswerverifiedShow Answer

How many significant figures does the result of the following operation contain? 8.52010 * 7.9

Correct AnswerverifiedShow Answer

One of the common intravenous fluids, called physiological saline, is a homogeneous mixture of NaCl in water. In this mixture, 0.89% of the mass is contributed by the NaCl. What mass of NaCl is found in 450.mL of physiological saline? (Given: density of physiological saline = 1.005 g/cm3)

Correct AnswerverifiedShow Answer

After carrying out the following operations, how many significant figures are appropriate to show in the result? (13.7 + 0.027) /8.221

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Ice, water...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

One of the common intravenous fluids, called physiological saline, is a homogeneous mixture of NaCl in water. In this mixture, 0.89% of the mass is contributed by the NaCl. What mass of NaCl is found in 450.mL of physiological saline? (Given: density of physiological saline = 1.005 g/cm³)

Correct Answer
verified

Correct Answer
verified