Question 1

Which of the following numbers is correctly written in scientific notation with the correct number of significant figures for 0.0004200?

Accepted Answer

$$4.200 	imes 10$$^{-4}$$

Question 2

A student measures the mass of a metal bolt as 14.74 g. The initial volume of water in a graduated cylinder is 20.0 mL, and after adding the bolt, the volume is 26.2 mL. What is the density of the bolt, reported with the correct number of significant figures?

Accepted Answer

$$2.38\ \mathrm{g/mL}$$

Question 3

Which of the following is an exact number?

Accepted Answer

The number of students in a classroom

Question 4

How many significant figures are in the measurement 0.073090 g?

Accepted Answer

5

Question 5

A marathon is 26.218 miles long. What is this distance in meters? (1 mile = 1.609 km)

Accepted Answer

$$42,195\ \mathrm{m}$$

Question 6

Which of the following best describes why measurements always have some degree of uncertainty?

Accepted Answer

Because measurements are limited by the precision of the measuring instrument

Question 7

What is the correct answer, with the proper number of significant figures, for $$(25.2 	imes 3.4 	imes 333) / 221$$?

Accepted Answer

$$13$$

Question 8

Which of the following conversion factors is defined as an exact number?

Accepted Answer

$$1\ \mathrm{in} = 2.54\ \mathrm{cm}$$

Question 9

A student adds $$2.345 + 0.0761 + 13.51 + 0.0025. $$What is the answer rounded to the correct number of decimal places?

Accepted Answer

$$15.93$$

Question 10

Which of the following statements about significant figures is FALSE?

Accepted Answer

Interior zeros are not significant.

Question 11

A sample of gold has a volume of $$25.0\ \mathrm{cm}^3$$ and a density of $$19.3\ \mathrm{g/cm}^3. $$What is its mass?

Accepted Answer

$$483\ \mathrm{g}$$

Question 12

Which of the following is the correct result for $$4.8 - 3.965$$, rounded according to the rules for significant figures?

Accepted Answer

$$0.8$$

Question 13

Which of the following is the correct reading for a thermometer showing a value between 19 and 20°C, with the meniscus at the third tick mark above 19?

Accepted Answer

$$19.3\ ^\circ\mathrm{C}$$

Question 14

Which of the following best describes the process of dimensional analysis?

Accepted Answer

Using conversion factors to change from one unit to another

Question 15

What is the correct answer, with the proper number of significant figures, for $$6600 / 2.25$$?

Accepted Answer

$$2900$$

Question 16

Which of the following is the correct way to express 582 in scientific notation?

Accepted Answer

$$5.82 	imes 10^2$

Question 17

A student calculates $$\log(3.245 	imes 10$$^{-9}$$). $$How many decimal places should the answer have?

Accepted Answer

4

Question 18

Which of the following is the correct metric relationship for volume?

Accepted Answer

$$1\ \mathrm{L} = 1000\ \mathrm{cm}^3$$

Measurement and Problem Solving: Scientific Notation, Significant Figures, and Units

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