Question 1

Which of the following numbers has exactly three significant figures?

Accepted Answer

$$0.00450$$

Question 2

How many significant figures are in the measurement $$0.02030$$?

Accepted Answer

$$4$$

Question 3

Which of the following statements about significant figures is correct?

Accepted Answer

Leading zeros are not significant.

Question 4

A student measures the mass of a sample as $$12.30 g $$and the volume as $$0.040 L. $$What is the density, reported with the correct number of significant figures?

Accepted Answer

$$308 g/L$$

Question 5

Which calculation below is correctly rounded to the appropriate number of significant figures?

Accepted Answer

$$2.34 	imes 1.2 = 2.8$$

Question 6

How many significant figures are in the measurement $$0.07080$$?

Accepted Answer

$$5$$

Question 7

When adding $$12.11$$, $$18.0$$, and $$1.013$$, what is the sum rounded to the correct number of decimal places?

Accepted Answer

$$31.1$$

Question 8

Which of the following best describes the rule for determining the number of significant figures in a product or quotient?

Accepted Answer

The answer should have as many significant figures as the number with the fewest significant figures.

Question 9

A laboratory thermometer reads $$0.00250$$ °C. How many significant figures does this measurement have?

Accepted Answer

$$3$$

Question 10

A student multiplies $$3.22 (3 $$sig figs) by $$2.1 (2 $$sig figs) and gets $$6.762. $$What is the correct answer with the proper number of significant figures?

Accepted Answer

$$6.8$$

Question 11

Which of the following numbers has four significant figures?

Accepted Answer

$$0.004560$$

Question 12

When performing the calculation $$4.56 + 1.4$$, what is the correct answer with the proper number of decimal places?

Accepted Answer

$$6.0$$

Question 13

Which of the following is NOT a rule for determining significant figures?

Accepted Answer

Leading zeros are significant.

Question 14

A measurement is recorded as $$0.03040 m. $$How many significant figures does it have?

Accepted Answer

$$4$$

Question 15

A student adds $$2.345 g$$, $$0.07 g$$, and $$0.004 g. $$What is the sum, rounded to the correct number of decimal places?

Accepted Answer

$$2.42$$

Significant Figures (Sig Figs) in Measurement and Calculations

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