Question 1

The S.I.prefix mega- (M) means

Accepted Answer

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

Question 2

Select the best statement.

Accepted Answer

A)  Physical changes may be reversed by changing the temperature.
B)  Physical changes alter the composition of the substances involved.
C)  Physical properties are not valid characteristics for identifying a substance.
D)  Physical properties are mostly extensive in nature.
E)  Physical changes are usually accompanied by chemical changes.F) C) and D)
G) B) and D)

Question 3

The speed needed to escape the pull of Earth's gravity is 11.3 km/s.What is this speed in mi/h?

Accepted Answer

A)  65,500 mi/h
B)  25,300 mi/h
C)  18,200 mi/h
D)  1,090 mi/h
E)  5.02  ×	imes×  10-3 mi/h F) B) and D)
G) B) and E)

Question 4

Isopropyl alcohol,commonly known as rubbing alcohol,boils at 82.4°C.What is the boiling point in kelvins?

Accepted Answer

A)  387.6 K
B)  355.6 K
C)  323.6 K
D)  190.8 K
E)  -190.8 KF) A) and B)
G) None of the above

Question 5

The S.I.unit of speed (velocity) is

Accepted Answer

A)  km/h
B)  km/s
C)  m/h
D)  m/s
E)  none of these choices is correctF) A) and E)
G) A) and D)

Question 6

An important aim in much chemical work is to use macroscopic measurements in order to gain an understanding of the microscopic world.

Accepted Answer

A) True 
 B)False

Question 7

When applying the scientific method,a model or theory should be based on experimental data.

Accepted Answer

A) True 
 B)False

Question 8

In an average year the American chemical industry produces more than 9.5 million metric tons of sodium carbonate.Over half of this is used in the manufacture of glass while another third is used in the production of detergents and other chemicals.How many pounds of sodium carbonate are produced annually?

Accepted Answer

A)  2.1  ×	imes×  1010 lb
B)  4.3  ×	imes×  109 lb
C)  1.1  ×	imes×  107 lb
D)  2.2  ×	imes×  106 lb
E)  2.1  ×	imes×  104 lb F) A) and B)
G) B) and D)

Question 9

If the price of gold at the morning fixing in London was $5310 per lb,what would a kilogram of gold have cost in £ (pounds) ? (Assume an exchange rate of $1.00 = £0.545)

Accepted Answer

A)  £1310
B)  £3510
C)  £6370
D)  £10400
E)  £17100F) C) and E)
G) C) and D)

Question 10

The density of mercury,the only metal to exist as a liquid at room temperature,is 13.6 g/cm3.What is that density in pounds per cubic inch?

Accepted Answer

A)  849 lb/in3
B)  491 lb/in3
C)  376 lb/in3
D)  0.491 lb/in3
E)  1.83  ×	imes×  10-3 lb/in3 F) A) and C)
G) All of the above

Question 11

At a pressure of one billionth (10-9) of atmospheric pressure,there are about 2.7  ×	imes×  1010 molecules in one cubic centimeter of a gas.How many molecules is this per cubic meter?

Accepted Answer

A)  2.7  ×	imes×  1016
B)  2.7  ×	imes×  1014
C)  2.7  ×	imes×  1012
D)  2.7  ×	imes×  108
E)  2.7  ×	imes×  104 F) B) and C)
G) A) and D)

Question 12

A flask has a mass of 78.23 g when empty and 593.63 g when filled with water.When the same flask is filled with concentrated sulfuric acid,H2SO4,its mass is 1026.57 g.What is the density of concentrated sulfuric acid? (Assume water has a density of 1.00 g/cm3 at the temperature of the measurement. )

Accepted Answer

A)  1.992 g/cm3
B)  1.840 g/cm3
C)  1.729 g/cm3
D)  1.598 g/cm3
E)  0.543 g/cm3F) C) and D)
G) D) and E)

Question 13

Acetone,which is used as a solvent and as a reactant in the manufacture of Plexiglas®,boils at 56.1°C.What is the boiling point in degrees Fahrenheit?

Accepted Answer

A)  159°F
B)  133°F
C)  101°F
D)  69.0°F
E)  43.4°FF) A) and D)
G) None of the above

Question 14

The area of a 15-inch pizza is 176.7 in2.Express this area in square centimeters.

Accepted Answer

A)  1140.cm2
B)  448.8 cm2
C)  96.8 cm2
D)  69.57 cm2
E)  27.39 cm2F) A) and B)
G) A) and E)

Question 15

The average distance from Earth to the Sun is 150 megameters.What is that distance in meters?

Accepted Answer

A)  1.5  ×	imes×  108 m
B)  1.5  ×	imes×  106 m
C)  1.5  ×	imes×  105 m
D)  1.5  ×	imes×  103 m
E)  1.5  ×	imes×  10-6 m F) D) and E)
G) All of the above

Question 16

Which of the following is not an S.I.base unit?

Accepted Answer

A)  meter
B)  ampere
C)  second
D)  gram
E)  kelvinF) None of the above
G) D) and E)

Question 17

Write the following numbers and results in scientific notation,with appropriate significant figures.
a.654
b.1234560
c.0.000000673
d.0.002590
e.200.4
f.260.0
g.$\pi$r 2,where r = 8.7 cm
h.23.24 + 18.6 - 5

Accepted Answer

a.6.54

10²
b.1.23456

10

Question 18

A dose of medication was prescribed to be 35 microliters.Which of the following expresses that volume in centiliters?

Accepted Answer

A)  3.5  ×	imes×  105 cL
B)  3.5  ×	imes×  104 cL
C)  3.5 cL
D)  3.5  ×	imes×  10-4 cL
E)  3.5  ×	imes×  10-3 cL F) C) and D)
G) None of the above

Question 19

As part of an experiment to determine the density of a new plastic developed in her laboratory,Sara Ann Dippity measures the volume of a solid sample.Her four trials yield volumes of 12.37 cm3,12.41 cm3,12.39 cm3,and 12.38 cm3.Measurements of other scientists in the lab give an average volume of 12.49 cm3.Which of the following statements represents the best analysis of the data?

Accepted Answer

A)  Sara's results have low precision and high accuracy.
B)  Sara's results have high precision and high accuracy.
C)  Sara's results have greater precision than accuracy.
D)  Sara's results have greater accuracy than precision.
E)  Sara has been using a faulty instrument to measure the volume.F) A) and B)
G) C) and E)

Question 20

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

Accepted Answer

A)  2
B)  3
C)  4
D)  5
E)  6 F) A) and D)
G) None of the above

Exam 1: Keys to the Study of Chemistry

Select the best statement.

Correct Answer
verified

The density of mercury,the only metal to exist as a liquid at room temperature,is 13.6 g/cm³.What is that density in pounds per cubic inch?

Correct Answer
verified

The appropriate number of significant figures in the result of 15.234 $\times$ 15.208 is

Correct Answer
verified

When applying the scientific method,a model or theory should be based on experimental data.

Correct Answer
verified

An important aim in much chemical work is to use macroscopic measurements in order to gain an understanding of the microscopic world.

Correct Answer
verified

The S.I.prefix mega- (M) means

Correct Answer
verified

Isopropyl alcohol,commonly known as rubbing alcohol,boils at 82.4°C.What is the boiling point in kelvins?

Correct Answer
verified

At a pressure of one billionth (10^-9) of atmospheric pressure,there are about 2.7 $\times$ 10¹⁰ molecules in one cubic centimeter of a gas.How many molecules is this per cubic meter?

Correct Answer
verified

A dose of medication was prescribed to be 35 microliters.Which of the following expresses that volume in centiliters?

Correct Answer
verified

The area of a 15-inch pizza is 176.7 in².Express this area in square centimeters.

Correct Answer
verified

Correct Answer
verified

The average distance from Earth to the Sun is 150 megameters.What is that distance in meters?

Correct Answer
verified

Write the following numbers and results in scientific notation,with appropriate significant figures. a.654 b.1234560 c.0.000000673 d.0.002590 e.200.4 f.260.0 g. $\pi$ r ²,where r = 8.7 cm h.23.24 + 18.6 - 5

Correct Answer
verified
a.6.54 10²
b.1.23456 10
View Answer

If the price of gold at the morning fixing in London was $5310 per lb,what would a kilogram of gold have cost in £ (pounds) ? (Assume an exchange rate of $1.00 = £0.545)

Correct Answer
verified

The speed needed to escape the pull of Earth^'s gravity is 11.3 km/s.What is this speed in mi/h?

Correct Answer
verified

The S.I.unit of speed (velocity) is

Correct Answer
verified

Correct Answer
verified

Acetone,which is used as a solvent and as a reactant in the manufacture of Plexiglas®,boils at 56.1°C.What is the boiling point in degrees Fahrenheit?

Correct Answer
verified

Correct Answer
verified

Which of the following is not an S.I.base unit?

Correct Answer
verified

Exam 1: Keys to the Study of Chemistry

Select the best statement.

Correct AnswerverifiedShow Answer

The density of mercury,the only metal to exist as a liquid at room temperature,is 13.6 g/cm3.What is that density in pounds per cubic inch?

Correct AnswerverifiedShow Answer

The appropriate number of significant figures in the result of 15.234 ×\times× 15.208 is

Correct AnswerverifiedShow Answer

When applying the scientific method,a model or theory should be based on experimental data.

Correct AnswerverifiedShow Answer

An important aim in much chemical work is to use macroscopic measurements in order to gain an understanding of the microscopic world.

Correct AnswerverifiedShow Answer

The S.I.prefix mega- (M) means

Correct AnswerverifiedShow Answer

Isopropyl alcohol,commonly known as rubbing alcohol,boils at 82.4°C.What is the boiling point in kelvins?

Correct AnswerverifiedShow Answer

At a pressure of one billionth (10-9) of atmospheric pressure,there are about 2.7 ×\times× 1010 molecules in one cubic centimeter of a gas.How many molecules is this per cubic meter?

Correct AnswerverifiedShow Answer

A dose of medication was prescribed to be 35 microliters.Which of the following expresses that volume in centiliters?

Correct AnswerverifiedShow Answer

The area of a 15-inch pizza is 176.7 in2.Express this area in square centimeters.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The average distance from Earth to the Sun is 150 megameters.What is that distance in meters?

Correct AnswerverifiedShow Answer

Write the following numbers and results in scientific notation,with appropriate significant figures. a.654 b.1234560 c.0.000000673 d.0.002590 e.200.4 f.260.0 g. π\piπ r 2,where r = 8.7 cm h.23.24 + 18.6 - 5

Correct Answerverifieda.6.54 102b.1.23456 10View AnswerShow Answer

If the price of gold at the morning fixing in London was $5310 per lb,what would a kilogram of gold have cost in £ (pounds) ? (Assume an exchange rate of $1.00 = £0.545)

Correct AnswerverifiedShow Answer

The speed needed to escape the pull of Earth's gravity is 11.3 km/s.What is this speed in mi/h?

Correct AnswerverifiedShow Answer

The S.I.unit of speed (velocity) is

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Acetone,which is used as a solvent and as a reactant in the manufacture of Plexiglas®,boils at 56.1°C.What is the boiling point in degrees Fahrenheit?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following is not an S.I.base unit?

Correct AnswerverifiedShow Answer

Correct Answer
verified

The density of mercury,the only metal to exist as a liquid at room temperature,is 13.6 g/cm³.What is that density in pounds per cubic inch?

Correct Answer
verified

The appropriate number of significant figures in the result of 15.234 $\times$ 15.208 is

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

At a pressure of one billionth (10^-9) of atmospheric pressure,there are about 2.7 $\times$ 10¹⁰ molecules in one cubic centimeter of a gas.How many molecules is this per cubic meter?

Correct Answer
verified

Correct Answer
verified

The area of a 15-inch pizza is 176.7 in².Express this area in square centimeters.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Write the following numbers and results in scientific notation,with appropriate significant figures. a.654 b.1234560 c.0.000000673 d.0.002590 e.200.4 f.260.0 g. $\pi$ r ²,where r = 8.7 cm h.23.24 + 18.6 - 5

Correct Answer
verified
a.6.54 10²
b.1.23456 10
View Answer

Correct Answer
verified

The speed needed to escape the pull of Earth^'s gravity is 11.3 km/s.What is this speed in mi/h?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified