Question 1

What is the volume (in cm3) of a 43.6 g piece of metal with a density of 2.71 g cm-3?

Accepted Answer

A)  16.1
B)  19.5
C)  .425
D)  6.65
E)  none of the aboveF) C) and D)
G) A) and E)

Question 2

If the outside air temperature is 30 °F,what is the temperature in kelvin?

Accepted Answer

A)  303 K
B)  307 K
C)  274 K
D)  272 KE) A) and C)
F) None of the above

Question 3

Which of the following represents a chemical property of hydrogen gas?

Accepted Answer

A)  It is gaseous at room temperature.
B)  It is less dense than air.
C)  It reacts explosively with oxygen.
D)  It is colourless.
E)  It is tasteless.F) A) and B)
G) B) and E)

Question 4

Which of the following is an example of a chemical change?

Accepted Answer

A)  Copper building materials develop a green patina over time.
B)  Solid ice melts.
C)  Ethanol evaporates.
D)  Brewing tea.E) All of the above
F) C) and D)

Question 5

A gas phase mixture has a temperature of 643 °C.Calculate the temperature in K.

Accepted Answer

A)  916 K
B)  873 K
C)  188 K
D)  1391 K
E)  370 KF) A) and B)
G) A) and C)

Question 6

Which of the following statements about the phases of matter is TRUE?

Accepted Answer

A)  In both solids and liquids,the atoms or molecules pack closely to one another.
B)  Solids are highly compressible.
C)  Gaseous substances have long-range repeating order.
D)  There is only one type of geometric arrangement that the atoms or molecules in any solid can adopt.
E)  Liquids have a large portion of empty volume between molecules.F) A) and B)
G) B) and D)

Question 7

What answer should be reported,with the correct number of significant figures,for the following calculation? 
3.000 × 105 + 614283

Accepted Answer

A)  914283
B)  9.1428 × 105
C)  914300
D)  9.14283 × 105
E)  914000F) All of the above
G) C) and E)

Question 8

What answer should be reported,with the correct number of significant figures,for the following calculation? 
1.682 × 10-3 + 4.311 × 10-2

Accepted Answer

A)  4.44792 × 10-2
B)  4.44792 × 10-3
C)  4.48 × 10-2
D)  4.479 × 10-3
E)  4.479 × 10-2F) All of the above
G) A) and C)

Question 9

Choose the heterogeneous mixture from the list below.

Accepted Answer

A)  sports drink
B)  chlorine gas
C)  black coffee
D)  chicken noodle soup
E)  carbon (graphite) F) All of the above
G) C) and E)

Question 10

The mass of a proton is 1.67 × 10-27 kg.What is the mass of a proton in nanograms?

Accepted Answer

A)  1.67 × 10-21 ng
B)  1.67 × 10-18 ng
C)  1.67 × 10-15 ng
D)  1.67 × 10-12 ngE) B) and D)
F) A) and D)

Question 11

The recommended adult dose of Elixophyllin  ,a drug used to treat asthma,is 105 mg kg-1 of body mass.Calculate the dose in milligrams for a 105-lb person.(1 lb = 453.59 g)

Accepted Answer

A)  22
B)  1,389
C)  1.4
D)  286
E)  2.9 ×  10510 ^ { 5 }105F) All of the above
G) C) and E)

Question 12

A mass of mercury occupies 0.750 L.What volume would an equal mass of ethanol occupy? The density of mercury is  13.546 g mL−113.546 \mathrm {~g} \mathrm {~mL} - 113.546 g mL−1  and the density of ethanol is 0.789 g mL-1.

Accepted Answer

A)  0.0437 L
B)  0.0777 L
C)  12.9 L
D)  22.9 L E) B) and C)
F) A) and D)

Question 13

An acetylene molecule contains 2 atoms of carbon.The number 2 represents how many significant figures?

Accepted Answer

A)  one
B)  two
C)  three
D)  infiniteE) A) and B)
F) All of the above

Question 14

What symbol is used to represent the factor 10-1?

Accepted Answer

A)  M
B)  m
C)  μ
D)  dE) B) and D)
F) None of the above

Question 15

Without using a calculator,solve the following problem:  [(1×10−8) ×(1×105) ]2(1×106) \frac { \left[ \left( 1 	imes 10 ^ { - 8 } ight)  	imes \left( 1 	imes 10 ^ { 5 } ight)  ight] ^ { 2 } } { \left( 1 	imes 10 ^ { 6 } ight)  }(1×106) [(1×10−8) ×(1×105) ]2​

Accepted Answer

A)  1 × 106
B)  1 × 100
C)  1 × 10-12
D)  1 × 10-18 E) B) and C)
F) A) and D)

Question 16

Define random error.

Accepted Answer

Random error has an ...

Question 17

A piece of metal ore weighs 8.25 g.When a student places it into a graduated cylinder containing water,the liquid level rises from 21.25 mL to 26.47 mL.What is the density of the ore?

Accepted Answer

A)  0.312 g mL-1
B)  0.633 g mL-1
C)  1.58 g mL-1
D)  3.21 g mL-1E) None of the above
F) All of the above

Question 18

Give the composition of water.

Accepted Answer

A)  two hydrogen atoms and two oxygen atoms
B)  one hydrogen atom and one oxygen atom
C)  two hydrogen atoms and one oxygen atom
D)  one hydrogen atom and two oxygen atomsE) A) and D)
F) B) and C)

Question 19

Round off 00907506 to four significant figures.

Accepted Answer

A)  0091
B)  9076
C)  9100
D)  9.075 × 105E) A) and D)
F) A) and C)

Question 20

What is the area,in m2,of a house that has 1236 square feet of floor space? 
(1 foot = 0.3048 m)

Accepted Answer

A)  376.7 m2
B)  214.8 m2
C)  114.8 m2
D)  687 m2
E)  573 m2F) A) and E)
G) D) and E)

Exam 1: Units of Measurement for Physical and Chemical Change

Choose the heterogeneous mixture from the list below.

Correct AnswerverifiedShow Answer

A gas phase mixture has a temperature of 643 °C.Calculate the temperature in K.

Correct AnswerverifiedShow Answer

A piece of metal ore weighs 8.25 g.When a student places it into a graduated cylinder containing water,the liquid level rises from 21.25 mL to 26.47 mL.What is the density of the ore?

Correct AnswerverifiedShow Answer

Round off 00907506 to four significant figures.

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What answer should be reported,with the correct number of significant figures,for the following calculation? 1.682 × 10-3 + 4.311 × 10-2

Correct AnswerverifiedShow Answer

Which of the following statements about the phases of matter is TRUE?

Correct AnswerverifiedShow Answer

What symbol is used to represent the factor 10-1?

Correct AnswerverifiedShow Answer

The mass of a proton is 1.67 × 10-27 kg.What is the mass of a proton in nanograms?

Correct AnswerverifiedShow Answer

Which of the following is an example of a chemical change?

Correct AnswerverifiedShow Answer

Which of the following represents a chemical property of hydrogen gas?

Correct AnswerverifiedShow Answer

An acetylene molecule contains 2 atoms of carbon.The number 2 represents how many significant figures?

Correct AnswerverifiedShow Answer

The recommended adult dose of Elixophyllin ,a drug used to treat asthma,is 105 mg kg-1 of body mass.Calculate the dose in milligrams for a 105-lb person.(1 lb = 453.59 g)

Correct AnswerverifiedShow Answer

What answer should be reported,with the correct number of significant figures,for the following calculation? 3.000 × 105 + 614283

Correct AnswerverifiedShow Answer

What is the area,in m2,of a house that has 1236 square feet of floor space? (1 foot = 0.3048 m)

Correct AnswerverifiedShow Answer

If the outside air temperature is 30 °F,what is the temperature in kelvin?

Correct AnswerverifiedShow Answer

Give the composition of water.

Correct AnswerverifiedShow Answer

Define random error.

Correct AnswerverifiedRandom error has an ...View AnswerShow Answer

A mass of mercury occupies 0.750 L.What volume would an equal mass of ethanol occupy? The density of mercury is 13.546 g mL−113.546 \mathrm {~g} \mathrm {~mL} - 113.546 g mL−1 and the density of ethanol is 0.789 g mL-1.

Correct AnswerverifiedShow Answer

What is the volume (in cm3) of a 43.6 g piece of metal with a density of 2.71 g cm-3?

Correct AnswerverifiedShow Answer

Without using a calculator,solve the following problem: [(1×10−8) ×(1×105) ]2(1×106) \frac { \left[ \left( 1 \times 10 ^ { - 8 } \right) \times \left( 1 \times 10 ^ { 5 } \right) \right] ^ { 2 } } { \left( 1 \times 10 ^ { 6 } \right) }(1×106) [(1×10−8) ×(1×105) ]2​

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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What answer should be reported,with the correct number of significant figures,for the following calculation? 1.682 × 10^-3+ 4.311 × 10^-2

Correct Answer
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Correct Answer
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What symbol is used to represent the factor 10^-1?

Correct Answer
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The mass of a proton is 1.67 × 10^-27 kg.What is the mass of a proton in nanograms?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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The recommended adult dose of Elixophyllin ,a drug used to treat asthma,is 105 mg kg^-1 of body mass.Calculate the dose in milligrams for a 105-lb person.(1 lb = 453.59 g)

Correct Answer
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What answer should be reported,with the correct number of significant figures,for the following calculation? 3.000 × 10⁵ + 614283

Correct Answer
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What is the area,in m²,of a house that has 1236 square feet of floor space? (1 foot = 0.3048 m)

Correct Answer
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Correct Answer
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Correct Answer
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Random error has an ...
View Answer

A mass of mercury occupies 0.750 L.What volume would an equal mass of ethanol occupy? The density of mercury is $13.546 \mathrm {~g} \mathrm {~mL} - 1$ and the density of ethanol is 0.789 g mL^-1.

Correct Answer
verified

What is the volume (in cm³) of a 43.6 g piece of metal with a density of 2.71 g cm^-3?

Correct Answer
verified

Without using a calculator,solve the following problem: $\frac { \left[ \left( 1 \times 10 ^ { - 8 } \right) \times \left( 1 \times 10 ^ { 5 } \right) \right] ^ { 2 } } { \left( 1 \times 10 ^ { 6 } \right) }$

Correct Answer
verified