Question 1

Perform the following mathematical operations. Express your answer to the proper number of significant figures.

Accepted Answer

The answer of Perform the following mathematical operations. Express your...

Question 2

Convert the following numbers from scientific notation to ordinary decimal notation.
-6.429 x 108 ____________________

Accepted Answer

Question 3

Express the following numbers in scientific notation.
-0.00021 ____________________

Accepted Answer

The answer of Express the following numbers in scientific notation.
-0.00021...

Question 4

The number 12.68 x 102, when expressed in correct scientific notation, becomes ________.

Accepted Answer

A)  1268 x 104 
B)  0.1268 x 100 
C)  1.268 x 103 
D)  1.268 x 10-3 
A)  1268 x 104 
B)  0.1268 x 100 
C)  1.268 x 103 
D)  1.268 x 10-3

Question 5

Which measurement is consistent with a graduated cylinder which has an uncertainty of 0.1 mL?

Accepted Answer

A)  21.14 mL 
B)  21 mL 
C)  21.1 mL 
D)  21.140 mL 
A)  21.14 mL 
B)  21 mL 
C)  21.1 mL 
D)  21.140 mL

Question 6

How many significant figures are found in each of the following measurements?

Accepted Answer

The answer of How many significant figures are found in...

Question 7

A rubber band is found to weigh 0.0978 g. What is the total mass of 106 such identical rubber bands?

Accepted Answer

A)  10.4 g 
B)  10.3 g 
C)  10.0 g 
D)  10 g 
A)  10.4 g 
B)  10.3 g 
C)  10.0 g 
D)  10 g

Question 8

How many of the following numbers have 4 significant figures? 
19.00 &ensp; 0.00006 &ensp; 1.609 x 108 &ensp; 13,600

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
A)  0 
B)  1 
C)  2 
D)  3

Question 9

The number 0.00309 expressed in scientific notation to the correct number of significant figures becomes ________.

Accepted Answer

A)  3.090 x 103 
B)  3.09 x 10-3 
C)  3.09 x 103 
D)  3.090 x 10-4 
A)  3.090 x 103 
B)  3.09 x 10-3 
C)  3.09 x 103 
D)  3.090 x 10-4

Question 10

A student cut 1200 pieces of copper wire, each wire weighed 1.769 grams. Calculate the total mass of the pieces of copper to the correct number of significant figures.

Accepted Answer

A)  2123 
B)  2100 
C)  2120 
D)  2122.8 
A)  2123 
B)  2100 
C)  2120 
D)  2122.8

Question 11

The number 0.090804, when rounded off to 4 significant figures, would appear as ________.

Accepted Answer

A)  0.091 
B)  0.0908 
C)  0.09080 
D)  0.090 
A)  0.091 
B)  0.0908 
C)  0.09080 
D)  0.090

Question 12

Express the following exponential expressions in correct scientific notation.
-0.123 x 106 ____________________

Accepted Answer

Question 13

Do the following multiplications and divisions, expressing your answers to the proper number of significant figures.
-(8.00 x 106)/(4.00 x 104) ____________________

Accepted Answer

Question 14

Do the following multiplications and divisions, expressing your answers to the proper number of significant figures.
-(2.00 x 102) x (2.00 x 10-4) ____________________

Accepted Answer

Question 15

Perform the following mathematical operations and express the answers to the correct number of significant figures.
-[(3.9780 x 10-2) x (1.010 x 104)]/ [(3.290 x 10-5) x (7.85 x 102)] = ___________________

Accepted Answer

Question 16

Express the following numbers in scientific notation.
-0.005300 ____________________

Accepted Answer

The answer of Express the following numbers in scientific notation.
-0.005300...

Question 17

When 0.0005760 is written in proper scientific notation with the correct number of significant figures the number is:

Accepted Answer

A)  57.60 x 10-5 
B)  5.760 x 10-4 
C)  5.760 x 104 
D)  5.76 x 10-4 
A)  57.60 x 10-5 
B)  5.760 x 10-4 
C)  5.760 x 104 
D)  5.76 x 10-4

Question 18

Express the following exponential expressions in correct scientific notation.
-0.000330 x 10−2 ____________________

Accepted Answer

Question 19

Which statement contains an exact number?

Accepted Answer

A)  A gross of paper contains 144 sheets. 
B)  One sheet of paper is 0.0042 inches thick. 
C)  One sheet of paper measures 8.5 x 11 inches. 
D)  A ream of medium weight paper weighs 20 pounds. 
A)  A gross of paper contains 144 sheets. 
B)  One sheet of paper is 0.0042 inches thick. 
C)  One sheet of paper measures 8.5 x 11 inches. 
D)  A ream of medium weight paper weighs 20 pounds.

Perform the following mathematical operations. Express your answer to the proper number of significant figures.

Convert the following numbers from scientific notation to ordinary decimal notation. -6.429 x 10⁸ ____________________

Express the following numbers in scientific notation. -0.00021 ____________________

The number 12.68 x 10², when expressed in correct scientific notation, becomes ________.

Which measurement is consistent with a graduated cylinder which has an uncertainty of 0.1 mL?

How many significant figures are found in each of the following measurements?

A rubber band is found to weigh 0.0978 g. What is the total mass of 106 such identical rubber bands?

How many of the following numbers have 4 significant figures? 19.00 0.00006 1.609 x 10⁸ 13,600

The number 0.00309 expressed in scientific notation to the correct number of significant figures becomes ________.

A student cut 1200 pieces of copper wire, each wire weighed 1.769 grams. Calculate the total mass of the pieces of copper to the correct number of significant figures.

The number 0.090804, when rounded off to 4 significant figures, would appear as ________.

Express the following exponential expressions in correct scientific notation. -0.123 x 10⁶ ____________________

Do the following multiplications and divisions, expressing your answers to the proper number of significant figures. -(8.00 x 10⁶)/(4.00 x 10⁴) ____________________

Do the following multiplications and divisions, expressing your answers to the proper number of significant figures. -(2.00 x 10²) x (2.00 x 10^-4) ____________________

Perform the following mathematical operations and express the answers to the correct number of significant figures. -[(3.9780 x 10^-2) x (1.010 x 10⁴)]/ [(3.290 x 10^-5) x (7.85 x 10²)] = ___________________

Express the following numbers in scientific notation. -0.005300 ____________________

When 0.0005760 is written in proper scientific notation with the correct number of significant figures the number is:

Express the following exponential expressions in correct scientific notation. -0.000330 x 10⁻² ____________________

Which statement contains an exact number?

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

Perform the following mathematical operations. Express your answer to the proper number of significant figures.

Convert the following numbers from scientific notation to ordinary decimal notation. -6.429 x 108 ____________________

Express the following numbers in scientific notation. -0.00021 ____________________

The number 12.68 x 102, when expressed in correct scientific notation, becomes ________.

Which measurement is consistent with a graduated cylinder which has an uncertainty of 0.1 mL?

How many significant figures are found in each of the following measurements?

A rubber band is found to weigh 0.0978 g. What is the total mass of 106 such identical rubber bands?

How many of the following numbers have 4 significant figures? 19.00 0.00006 1.609 x 108 13,600

The number 0.00309 expressed in scientific notation to the correct number of significant figures becomes ________.

A student cut 1200 pieces of copper wire, each wire weighed 1.769 grams. Calculate the total mass of the pieces of copper to the correct number of significant figures.

The number 0.090804, when rounded off to 4 significant figures, would appear as ________.

Express the following exponential expressions in correct scientific notation. -0.123 x 106 ____________________

Do the following multiplications and divisions, expressing your answers to the proper number of significant figures. -(8.00 x 106)/(4.00 x 104) ____________________

Do the following multiplications and divisions, expressing your answers to the proper number of significant figures. -(2.00 x 102) x (2.00 x 10-4) ____________________

Perform the following mathematical operations and express the answers to the correct number of significant figures. -[(3.9780 x 10-2) x (1.010 x 104)]/ [(3.290 x 10-5) x (7.85 x 102)] = ___________________

Express the following numbers in scientific notation. -0.005300 ____________________

When 0.0005760 is written in proper scientific notation with the correct number of significant figures the number is:

Express the following exponential expressions in correct scientific notation. -0.000330 x 10−2 ____________________

Which statement contains an exact number?

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

Convert the following numbers from scientific notation to ordinary decimal notation. -6.429 x 10⁸ ____________________

The number 12.68 x 10², when expressed in correct scientific notation, becomes ________.

How many of the following numbers have 4 significant figures? 19.00 0.00006 1.609 x 10⁸ 13,600

Express the following exponential expressions in correct scientific notation. -0.123 x 10⁶ ____________________

Do the following multiplications and divisions, expressing your answers to the proper number of significant figures. -(8.00 x 10⁶)/(4.00 x 10⁴) ____________________

Do the following multiplications and divisions, expressing your answers to the proper number of significant figures. -(2.00 x 10²) x (2.00 x 10^-4) ____________________

Perform the following mathematical operations and express the answers to the correct number of significant figures. -[(3.9780 x 10^-2) x (1.010 x 10⁴)]/ [(3.290 x 10^-5) x (7.85 x 10²)] = ___________________

Express the following exponential expressions in correct scientific notation. -0.000330 x 10⁻² ____________________