When the value 4.449 is rounded to two significant figures, the number should be reported as: 

A) 4.4

B) 4.5

C) 4.44

D) 4.45

E) none of the above

Answer: A

Which of the following statements is NOT part of the rules for determining significant figures?

A) Non-zero digits at the end of a number are not significant.

B) Zeroes between two numbers are significant.

C) Zeroes to the left of the first non-zero number are not significant. 

D) Trailing zeroes at the end of a number, but before an implied decimal point are ambiguous.

E) All of the above statements are part of the rules.

Answer: A

The correct number of significant figures in the number 0.002320 is: 

A) 7

B) 4

C) 3

D) ambiguous

E) none of the above

Answer: B

The correct number of significant figures in the number 4.0 × 10-2 is: 

A) 1

B) 2

C) 3

D) ambiguous.

E) none of the above

Answer: B

The correct number of significant figures in the number 0.027090 is: 

A) 7

B) 6

C) 5

D) ambiguous

E) none of the above

Answer: C

The correct number of significant figures in the number 1.250100 is:

A) 5

B) 7

C) 4

D) ambiguous

E) none of the above

Answer: B

The correct number of significant figures in the number 865,000 is:

A) 3

B) 6

C) 4

D) ambiguous

E) none of the above

Answer: D

There are exactly 2.54 centimeters in 1 inch. When using this conversion factor, how many significant figures are you limited to?

A) 1

B) 3

C) ambiguous

D) depends on if you are using it in multiplication/division or addition/subtraction 

E) infinite number of significant figures

Answer: E

In the number 48.93, which digit is estimated? 

A) 4

B) 8

C) 9

D) 3

E) None of the above, all digits are certain

Answer: D

Suppose a thermometer has marks at every one degree increment and the mercury level on the thermometer is exactly between the 25 and 26 degree Celsius marks. We should properly report the temperature measurement as: 

A) 25°C

B) 26°C

C) 25.5°C

D) 25.50°C

E) 25.55°C

Answer: C

The correct decimal representation of 6.453 × 103 is:

A) 6,453

B) 0.006453

C) 6.5 × 103

D) 6.453

E) none of the above

Answer: A

The wavelength of blue light is 0.00000045 m. Express this wavelength in scientific notation.

A) 4.5 × 10-6 m

B) 4.5 × 10^6 m

C) 4.5 × 10 -7 m

D) 4.5 × 10^7 m

E) 0.45 × 10-7 m

Answer: C

The distance between the two hydrogen atoms in a molecule of water is 0.000000000172 m. Express this distance in scientific notation.

A) 1.72 × 10- 9 m

B) 1.72 × 10-10 m

C) 0.172 × 10-10 m

D) 17.2 × 9 m

E) 1.72 × 10 m

Answer: B

The correct scientific notation for the number 500.0 is:

A) 5 × 102

B) 5.00 × 102

C) 5.000 × 102

D) 5 × 10-2

E) none of the above

Answer: C

The correct scientific notation for the number 0.00050210 is:

A) 5.0210 × 104

B) 5.021 × 10-4

C) 5.021 × 104

D) 5.0210 × 10-4

E) none of the above

Answer: D