Question 1

Express using scientific notation: 351 000 000 000

Accepted Answer

3.51 × 10¹¹

Question 2

In order to enhance your learning in chemistry, you should NOT

Accepted Answer

A) form a study group. 
B) wait until the night before the exam to study. 
C) go to professor's office hours. 
D) be an active learner. 
E) study a little every day. 
A) form a study group. 
B) wait until the night before the exam to study. 
C) go to professor's office hours. 
D) be an active learner. 
E) study a little every day. B

Question 3

In the number 12.345, the 1 is in the ________ place.

Accepted Answer

A) tens 
B) ones 
C) tenths 
D) hundredths 
E) thousandths 
A) tens 
B) ones 
C) tenths 
D) hundredths 
E) thousandths A

Question 4

The substances released when tissues are injured are ________.

Accepted Answer

The answer of The substances released when tissues are injured...

Question 5

One example of a chemical used in toothpaste is

Accepted Answer

A) sulfur. 
B) chlorine. 
C) calcium carbonate. 
D) sugar. 
E) carbon dioxide. 
A) sulfur. 
B) chlorine. 
C) calcium carbonate. 
D) sugar. 
E) carbon dioxide.

Question 6

Express using scientific notation: 0.000 000 050

Accepted Answer

The answer of Express using scientific notation: 0.000 000 050...

Question 7

A substance that always has the same composition and properties is called a(n)________.

Accepted Answer

The answer of A substance that always has the same...

Question 8

Titanium dioxide is a chemical used in toothpaste to

Accepted Answer

A) disinfect the toothbrush. 
B) strengthen tooth enamel. 
C) make the toothpaste white. 
D) remove plaque. 
E) keep the paste from spoiling. 
A) disinfect the toothbrush. 
B) strengthen tooth enamel. 
C) make the toothpaste white. 
D) remove plaque. 
E) keep the paste from spoiling.

Question 9

Written in scientific notation, 0.000 000 33 is

Accepted Answer

A)  3.3 × 108. 
B)  3.3. 
C)  3.3 × 107. 
D)  3.3 × 10-8. 
E)  3.3 × 10-7. 
A)  3.3 × 108. 
B)  3.3. 
C)  3.3 × 107. 
D)  3.3 × 10-8. 
E)  3.3 × 10-7.

Question 10

For the equation : -10 - (-4)=

Accepted Answer

A) 4 
B) 6 
C) -14 
D) 14 
E) -6 
A) 4 
B) 6 
C) -14 
D) 14 
E) -6

Question 11

For the equation 4x + 2 = 10 , x equals

Accepted Answer

A) -2 
B) 8 
C) 3 
D) 2 
E) 12 
A) -2 
B) 8 
C) 3 
D) 2 
E) 12

Question 12

In the number 12.345, the 3 is in the ________ place.

Accepted Answer

A) tens 
B) ones 
C) tenths 
D) hundredths 
E) thousandths 
A) tens 
B) ones 
C) tenths 
D) hundredths 
E) thousandths

Question 13

The product of (-4)× (-5)is

Accepted Answer

A) -1 
B) .20 
C) -20 
D) 0 
E) .1 
A) -1 
B) .20 
C) -20 
D) 0 
E) .1

Question 14

16 is what percentage of 80?

Accepted Answer

A) 20% 
B) 5% 
C) 200% 
D) 2% 
E) 50% 
A) 20% 
B) 5% 
C) 200% 
D) 2% 
E) 50%

Question 15

On the graph, what is the temperature after 40 minutes?

Accepted Answer

A)  44 °C 
B)  40 °C 
C)  57 °C 
D)  26 °C 
E)  36 °C 
A)  44 °C 
B)  40 °C 
C)  57 °C 
D)  26 °C 
E)  36 °C

Question 16

Express using scientific notation: 5 207 000

Accepted Answer

The answer of Express using scientific notation: 5 207 000...

Question 17

The chemical used to make cans and foil is ________.

Accepted Answer

The answer of The chemical used to make cans and...

Question 18

In the number 12.345, the 4 is in the ________ place.

Accepted Answer

A) tens 
B) ones 
C) tenths 
D) hundredths 
E) thousandths 
A) tens 
B) ones 
C) tenths 
D) hundredths 
E) thousandths

Question 19

Written in scientific notation, 540 000 is

Accepted Answer

A)  5.4 × 10-5. 
B)  5.4. 
C)  54 × 108. 
D)  0.54 × 106. 
E)  5.4 × 105. 
A)  5.4 × 10-5. 
B)  5.4. 
C)  54 × 108. 
D)  0.54 × 106. 
E)  5.4 × 105.

Question 20

Express using scientific notation: 0.000 860

Accepted Answer

The answer of Express using scientific notation: 0.000 860...

Exam 1: Chemistry in Our Lives

Express using scientific notation: 351 000 000 000

In order to enhance your learning in chemistry, you should NOT

In the number 12.345, the 1 is in the ________ place.

The substances released when tissues are injured are ________.

One example of a chemical used in toothpaste is

Express using scientific notation: 0.000 000 050

A substance that always has the same composition and properties is called a(n)________.

Titanium dioxide is a chemical used in toothpaste to

Written in scientific notation, 0.000 000 33 is

For the equation : -10 - (-4)=

For the equation 4x + 2 = 10 , x equals

In the number 12.345, the 3 is in the ________ place.

The product of (-4)× (-5)is

16 is what percentage of 80?

On the graph, what is the temperature after 40 minutes?

Express using scientific notation: 5 207 000

The chemical used to make cans and foil is ________.

In the number 12.345, the 4 is in the ________ place.

Written in scientific notation, 540 000 is

Express using scientific notation: 0.000 860

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