Question 1

The number 6.0448,rounded to 3 decimal places,becomes 6.045.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following represents the largest volume?

Accepted Answer

A)  10,000 µL
B)  1000 pL
C)  100 mL
D)  10 nL
E)  10 cm3 F) B) and D)
G) All of the above

Question 3

An evacuated 276 mL glass bulb weighs 129.6375 g.Filled with an unknown gas,the bulb weighs 130.0318 g.Calculate the gas density in g/L,and express it with an appropriate number of significant figures.

Accepted Answer

The answer of An evacuated 276 mL glass bulb weighs...

Question 4

The mass of a sample is 550 milligrams.Which of the following expresses that mass in kilograms?

Accepted Answer

A)  5.5  ×	imes×  108 kg
B)  5.5  ×	imes×  105 kg
C)  5.5  ×	imes×  10-4 kg
D)  5.5  ×	imes×  10-6 kg
E)  5.5  ×	imes×  10-1 kg F) A) and B)
G) C) and E)

Question 5

You prepare 1000.mL of tea and transfer it to a 1.00 quart pitcher for storage.Which of the following statements is true?

Accepted Answer

A)  The pitcher will be filled to 100% of its capacity with no tea spilled.
B)  The pitcher will be filled to about 95% of its capacity.
C)  The pitcher will be filled to about 50% of its capacity.
D)  The pitcher will be completely filled and a small amount of tea will overflow.
E)  The pitcher will be completely filled and most of the tea will overflow.F) A) and D)
G) C) and D)

Question 6

The ripening of fruit,once picked,is an example of physical change.

Accepted Answer

A) True 
 B)False

Question 7

Which one of the following is a "substance" in the sense of the word as used in your textbook?

Accepted Answer

A)  air
B)  tap water
C)  sea water
D)  water
E)  toothpasteF) C) and D)
G) B) and E)

Question 8

In each of the sets below,choose the one quantity or number which is exact.
a.(i. )the human population
(ii. )the distance in light years from the sun to Alpha Centauri,a nearby star
(iii. )the winning time for the 100 m dash in the Olympic Games
b.(i. )the weight of a particular one cent coin in g
(ii. )the boiling point of lead,in °C
(iii. )the number of cm in 1 yd
c.(i. )the measured value of the speed of light (2.998...$\times$ 108 m/s)
(ii. ) $\pi$ (3.141... )
(iii. )the volume of milk in a 1-gallon jug

Accepted Answer

The answer of In each of the sets below,choose the...

Question 9

When a wooden match burns in air,chemical potential energy is converted to kinetic energy.

Accepted Answer

A) True 
 B)False

Question 10

Talc is a mineral that has low conductivity for heat and electricity and that is not attacked by acid.It is used as talcum powder and face powder.A sample of talc weighs 35.97 g in air and 13.65 g in mineral oil (d = 1.75 g/cm3) .What is the density of talc?

Accepted Answer

A)  4.61 g/cm3
B)  2.82 g/cm3
C)  2.63 g/cm3
D)  2.44 g/cm3
E)  1.61 g/cm3F) B) and C)
G) A) and D)

Question 11

The result of (3.8621  ×	imes×  1.5630) - 5.98 is properly written as

Accepted Answer

A)  0.06
B)  0.056
C)  0.0565
D)  0.05646
E)  0.056462 F) A) and D)
G) C) and E)

Question 12

Select the answer that expresses the result of this calculation with the correct number of significant figures.

Accepted Answer

A)  13.3568
B)  13.357
C)  13.36
D)  13.4
E)  13F) B) and E)
G) A) and C)

Question 13

Which of the following is an extensive property of oxygen?

Accepted Answer

A)  boiling point
B)  temperature
C)  average kinetic energy of molecules
D)  density
E)  massF) A) and B)
G) D) and E)

Question 14

The number 6.0448,rounded to 2 decimal places,becomes 6.05.

Accepted Answer

A) True 
 B)False

Question 15

Classify the following properties of hydrogen gas as either intensive or extensive.
a.the mass of the gas sample
b.the average speed of a molecule in the sample
c.temperature
d.density
e.number of molecules present

Accepted Answer

The answer of Classify the following properties of hydrogen gas...

Question 16

The appropriate number of significant figures in the result of 15.234 - 15.208 is

Accepted Answer

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

Question 17

Write the following numbers and results in standard notation,with appropriate significant figures.
a.7.85 $\times$ 10-3
b.7.85 $\times$ 104
c.5.920 $\times$ 103
d.  
e.7.00 $\times$ 10-5
f.circumference of a circle,2$\pi$r,where r = 8.7 cm
g.

Accepted Answer

a.0.00785
b.78500
c....

Question 18

Which of the following is a chemical change?

Accepted Answer

A)  boiling of water
B)  melting wax
C)  broiling a steak on a grill
D)  condensing water vapor into rainfall
E)  carving a piece of woodF) D) and E)
G) A) and B)

Question 19

The potential energy of a car moving on a level road does not depend on its speed.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following correctly expresses 0.000007913 g in scientific notation?

Accepted Answer

A)  7.913  ×	imes×  106 g
B)  7.913  ×	imes×  105 g
C)  7.913  ×	imes×  10-5 g
D)  7.913  ×	imes×  10-6 g
E)  7.913  ×	imes×  10-9 g F) All of the above
G) A) and E)

Exam 1: Keys to the Study of Chemistry

The number 6.0448,rounded to 2 decimal places,becomes 6.05.

Correct Answer
verified

The number 6.0448,rounded to 3 decimal places,becomes 6.045.

Correct Answer
verified

The result of (3.8621 $\times$ 1.5630) - 5.98 is properly written as

Correct Answer
verified

Classify the following properties of hydrogen gas as either intensive or extensive. a.the mass of the gas sample b.the average speed of a molecule in the sample c.temperature d.density e.number of molecules present

Correct Answer
verified

Talc is a mineral that has low conductivity for heat and electricity and that is not attacked by acid.It is used as talcum powder and face powder.A sample of talc weighs 35.97 g in air and 13.65 g in mineral oil (d = 1.75 g/cm³) .What is the density of talc?

Correct Answer
verified

The ripening of fruit,once picked,is an example of physical change.

Correct Answer
verified

Which of the following is an extensive property of oxygen?

Correct Answer
verified

Which one of the following is a "substance" in the sense of the word as used in your textbook?

Correct Answer
verified

An evacuated 276 mL glass bulb weighs 129.6375 g.Filled with an unknown gas,the bulb weighs 130.0318 g.Calculate the gas density in g/L,and express it with an appropriate number of significant figures.

Correct Answer
verified

Select the answer that expresses the result of this calculation with the correct number of significant figures.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
a.0.00785
b.78500
c....
View Answer

Which of the following represents the largest volume?

Correct Answer
verified

When a wooden match burns in air,chemical potential energy is converted to kinetic energy.

Correct Answer
verified

Which of the following is a chemical change?

Correct Answer
verified

The mass of a sample is 550 milligrams.Which of the following expresses that mass in kilograms?

Correct Answer
verified

Which of the following correctly expresses 0.000007913 g in scientific notation?

Correct Answer
verified

The potential energy of a car moving on a level road does not depend on its speed.

Correct Answer
verified

The appropriate number of significant figures in the result of 15.234 - 15.208 is

Correct Answer
verified

You prepare 1000.mL of tea and transfer it to a 1.00 quart pitcher for storage.Which of the following statements is true?

Correct Answer
verified

Exam 1: Keys to the Study of Chemistry

The number 6.0448,rounded to 2 decimal places,becomes 6.05.

Correct AnswerverifiedShow Answer

The number 6.0448,rounded to 3 decimal places,becomes 6.045.

Correct AnswerverifiedShow Answer

The result of (3.8621 ×\times× 1.5630) - 5.98 is properly written as

Correct AnswerverifiedShow Answer

Classify the following properties of hydrogen gas as either intensive or extensive. a.the mass of the gas sample b.the average speed of a molecule in the sample c.temperature d.density e.number of molecules present

Correct AnswerverifiedShow Answer

Talc is a mineral that has low conductivity for heat and electricity and that is not attacked by acid.It is used as talcum powder and face powder.A sample of talc weighs 35.97 g in air and 13.65 g in mineral oil (d = 1.75 g/cm3) .What is the density of talc?

Correct AnswerverifiedShow Answer

The ripening of fruit,once picked,is an example of physical change.

Correct AnswerverifiedShow Answer

Which of the following is an extensive property of oxygen?

Correct AnswerverifiedShow Answer

Which one of the following is a "substance" in the sense of the word as used in your textbook?

Correct AnswerverifiedShow Answer

An evacuated 276 mL glass bulb weighs 129.6375 g.Filled with an unknown gas,the bulb weighs 130.0318 g.Calculate the gas density in g/L,and express it with an appropriate number of significant figures.

Correct AnswerverifiedShow Answer

Select the answer that expresses the result of this calculation with the correct number of significant figures.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Write the following numbers and results in standard notation,with appropriate significant figures. a.7.85 ×\times× 10-3 b.7.85 ×\times× 104 c.5.920 ×\times× 103 d. e.7.00 ×\times× 10-5 f.circumference of a circle,2 π\piπ r,where r = 8.7 cm g.

Correct Answerverifieda.0.00785b.78500c....View AnswerShow Answer

Which of the following represents the largest volume?

Correct AnswerverifiedShow Answer

When a wooden match burns in air,chemical potential energy is converted to kinetic energy.

Correct AnswerverifiedShow Answer

Which of the following is a chemical change?

Correct AnswerverifiedShow Answer

The mass of a sample is 550 milligrams.Which of the following expresses that mass in kilograms?

Correct AnswerverifiedShow Answer

Which of the following correctly expresses 0.000007913 g in scientific notation?

Correct AnswerverifiedShow Answer

The potential energy of a car moving on a level road does not depend on its speed.

Correct AnswerverifiedShow Answer

The appropriate number of significant figures in the result of 15.234 - 15.208 is

Correct AnswerverifiedShow Answer

You prepare 1000.mL of tea and transfer it to a 1.00 quart pitcher for storage.Which of the following statements is true?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

The result of (3.8621 $\times$ 1.5630) - 5.98 is properly written as

Correct Answer
verified

Correct Answer
verified

Talc is a mineral that has low conductivity for heat and electricity and that is not attacked by acid.It is used as talcum powder and face powder.A sample of talc weighs 35.97 g in air and 13.65 g in mineral oil (d = 1.75 g/cm³) .What is the density of talc?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
a.0.00785
b.78500
c....
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified