Question 1

The calculator answer obtained from multiplying 21.08 1.9634 is 41.388472. The answer to the correct number of significant figures is ________.

Accepted Answer

A)  41.388 
B)  41.4 
C)  41.39 
D)  41.3884 
A)  41.388 
B)  41.4 
C)  41.39 
D)  41.3884

Question 2

What is the correct number of significant figures in the answer for the following sum?
8.650 + 19.6 + 44.05 + 88

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  5 
A)  2 
B)  3 
C)  4 
D)  5

Question 3

In which of the following pairs of numbers does each member of the pair contain the same number of significant figures?

Accepted Answer

A)  39 and 3090 
B)  9900.0 and 60.01 
C)  0.05700 and 0.0570 
D)  45010 and 0.09871 
A)  39 and 3090 
B)  9900.0 and 60.01 
C)  0.05700 and 0.0570 
D)  45010 and 0.09871

Question 4

Round off each of the following numbers to the number of significant figures indicated in parenthesis.
-0.003010 (two) ____________________

Accepted Answer

The answer of Round off each of the following numbers...

Question 5

The number 7.134 × 107 in normal decimal notation is ________.

Accepted Answer

A)  0.0000007134 
B)  7,134,000 
C)  713,400 
D)  71,340,000 
A)  0.0000007134 
B)  7,134,000 
C)  713,400 
D)  71,340,000

Question 6

Which of the following numbers contains 3 significant figures?

Accepted Answer

A)  1.050 
B)  85.967 
C)  8.90 
D)  350 
A)  1.050 
B)  85.967 
C)  8.90 
D)  350

Question 7

A penny weighs 1.575 g. What is the total mass of 150 pennies?

Accepted Answer

A)  236.25 
B)  236.2 
C)  95.24 
D)  0.0105 
A)  236.25 
B)  236.2 
C)  95.24 
D)  0.0105

Question 8

Express the following numbers in scientific notation.
-5489 ____________________

Accepted Answer

The answer of Express the following numbers in scientific notation.
-5489...

Question 9

Which of the following numbers contains 2 significant figures?

Accepted Answer

A)  3.741 
B)  190 
C)  0.02 
D)  90.60 
A)  3.741 
B)  190 
C)  0.02 
D)  90.60

Question 10

The numerical value for (5.6 x 104) ÷ (7.89 x 102) is equal to, with the proper number of significant figures:

Accepted Answer

A)  70.976 
B)  71 
C)  7.098 x 101 
D)  71.0 
A)  70.976 
B)  71 
C)  7.098 x 101 
D)  71.0

Question 11

Round off the following numbers to 4 significant figures.
-0.00065298 ____________________

Accepted Answer

The answer of Round off the following numbers to 4...

Question 12

A balance has an accuracy of 0.001 grams. Which mass reading below was read from this balance?

Accepted Answer

A)  49.1009 g 
B)  49.10 g 
C)  49.10090 g 
D)  49.101 g 
A)  49.1009 g 
B)  49.10 g 
C)  49.10090 g 
D)  49.101 g

Question 13

Do the following additions or subtractions, expressing your answers to the proper number of significant figures.
-200 + 0.09 ____________________

Accepted Answer

The answer of Do the following additions or subtractions, expressing...

Question 14

Express the following numbers in scientific notation.
-0.0004081 ____________________

Accepted Answer

The answer of Express the following numbers in scientific notation.
-0.0004081...

Question 15

The correct answer obtained by dividing the measurement (6.00 x 104) by the measurement (2.0 x 102) is ________.

Accepted Answer

A)  3 x 101 
B)  3 x 10-2 
C)  3.00 x 102 
D)  3.0 x 102 
A)  3 x 101 
B)  3 x 10-2 
C)  3.00 x 102 
D)  3.0 x 102

Question 16

Express the following exponential expressions in correct scientific notation.
-13.30 x 108 ____________________

Accepted Answer

Question 17

Perform the following mathematical operations. Express your answer to the proper number of significant figures.
(93.789 - 5.40) x 18.057 =

Accepted Answer

A)  1600 
B)  1596.239 
C)  1590 
D)  1596 
A)  1600 
B)  1596.239 
C)  1590 
D)  1596

Question 18

Which of the following statements concerning the "significance" of zeros in recorded measurements is incorrect?

Accepted Answer

A)  Leading zeros are never significant. 
B)  Confined zeros are always significant. 
C)  Trailing zeros are not always significant. 
D)  Trailing and leading zeros are not always significant. 
A)  Leading zeros are never significant. 
B)  Confined zeros are always significant. 
C)  Trailing zeros are not always significant. 
D)  Trailing and leading zeros are not always significant.

Question 19

The number 9080000 written in scientific notation to the correct number of significant figures is ________.

Accepted Answer

A)  9.1 x 107 
B)  9.08 x 107 
C)  9.08 x 106 
D)  9.1 x 106 
A)  9.1 x 107 
B)  9.08 x 107 
C)  9.08 x 106 
D)  9.1 x 106

Question 20

Perform the following mathematical operations and express the answers to the correct number of significant figures.
-[400 x 1719]/[56.1 x 97] = ____________________

Accepted Answer

The answer of Perform the following mathematical operations and express...

The calculator answer obtained from multiplying 21.08 1.9634 is 41.388472. The answer to the correct number of significant figures is ________.

What is the correct number of significant figures in the answer for the following sum? 8.650 + 19.6 + 44.05 + 88

In which of the following pairs of numbers does each member of the pair contain the same number of significant figures?

Round off each of the following numbers to the number of significant figures indicated in parenthesis. -0.003010 (two) ____________________

The number 7.134 × 10⁷ in normal decimal notation is ________.

Which of the following numbers contains 3 significant figures?

A penny weighs 1.575 g. What is the total mass of 150 pennies?

Express the following numbers in scientific notation. -5489 ____________________

Which of the following numbers contains 2 significant figures?

The numerical value for (5.6 x 10⁴) ÷ (7.89 x 10²) is equal to, with the proper number of significant figures:

Round off the following numbers to 4 significant figures. -0.00065298 ____________________

A balance has an accuracy of 0.001 grams. Which mass reading below was read from this balance?

Do the following additions or subtractions, expressing your answers to the proper number of significant figures. -200 + 0.09 ____________________

Express the following numbers in scientific notation. -0.0004081 ____________________

The correct answer obtained by dividing the measurement (6.00 x 10⁴) by the measurement (2.0 x 10²) is ________.

Express the following exponential expressions in correct scientific notation. -13.30 x 10⁸ ____________________

Perform the following mathematical operations. Express your answer to the proper number of significant figures. (93.789 - 5.40) x 18.057 =

Which of the following statements concerning the "significance" of zeros in recorded measurements is incorrect?

The number 9080000 written in scientific notation to the correct number of significant figures is ________.

Perform the following mathematical operations and express the answers to the correct number of significant figures. -[400 x 1719]/[56.1 x 97] = ____________________

The Science of Chemistry

Unit Systems and Dimensional Analysis

Basic Concepts About Matter

Atoms, Molecules, Formulas, and Subatomic Particles

Electronic Structure and Chemical Periodicity

Chemical Bonds

Chemical Nomenclature

Chemical Calculations: the Mole Concept and Chemical Formulas

Chemical Calculations Involving Chemical Equations

States of Matter

Gas Laws

Solutions

Acids, Bases and Salts

Oxidation and Reduction

Reaction Rates and Chemical Equilibrium

Nuclear Chemistry

Filters

Exam 2: Numbers From Measurements

The calculator answer obtained from multiplying 21.08 1.9634 is 41.388472. The answer to the correct number of significant figures is ________.

What is the correct number of significant figures in the answer for the following sum? 8.650 + 19.6 + 44.05 + 88

In which of the following pairs of numbers does each member of the pair contain the same number of significant figures?

Round off each of the following numbers to the number of significant figures indicated in parenthesis. -0.003010 (two) ____________________

The number 7.134 × 107 in normal decimal notation is ________.

Which of the following numbers contains 3 significant figures?

A penny weighs 1.575 g. What is the total mass of 150 pennies?

Express the following numbers in scientific notation. -5489 ____________________

Which of the following numbers contains 2 significant figures?

The numerical value for (5.6 x 104) ÷ (7.89 x 102) is equal to, with the proper number of significant figures:

Round off the following numbers to 4 significant figures. -0.00065298 ____________________

A balance has an accuracy of 0.001 grams. Which mass reading below was read from this balance?

Do the following additions or subtractions, expressing your answers to the proper number of significant figures. -200 + 0.09 ____________________

Express the following numbers in scientific notation. -0.0004081 ____________________

The correct answer obtained by dividing the measurement (6.00 x 104) by the measurement (2.0 x 102) is ________.

Express the following exponential expressions in correct scientific notation. -13.30 x 108 ____________________

Perform the following mathematical operations. Express your answer to the proper number of significant figures. (93.789 - 5.40) x 18.057 =

Which of the following statements concerning the "significance" of zeros in recorded measurements is incorrect?

The number 9080000 written in scientific notation to the correct number of significant figures is ________.

Perform the following mathematical operations and express the answers to the correct number of significant figures. -[400 x 1719]/[56.1 x 97] = ____________________

The Science of Chemistry

Unit Systems and Dimensional Analysis

Basic Concepts About Matter

Atoms, Molecules, Formulas, and Subatomic Particles

Electronic Structure and Chemical Periodicity

Chemical Bonds

Chemical Nomenclature

Chemical Calculations: the Mole Concept and Chemical Formulas

Chemical Calculations Involving Chemical Equations

States of Matter

Gas Laws

Solutions

Acids, Bases and Salts

Oxidation and Reduction

Reaction Rates and Chemical Equilibrium

Nuclear Chemistry

Filters

The number 7.134 × 10⁷ in normal decimal notation is ________.

The numerical value for (5.6 x 10⁴) ÷ (7.89 x 10²) is equal to, with the proper number of significant figures:

The correct answer obtained by dividing the measurement (6.00 x 10⁴) by the measurement (2.0 x 10²) is ________.

Express the following exponential expressions in correct scientific notation. -13.30 x 10⁸ ____________________