Q: A marathon is 26.2 miles long. How many inches are in the marathon? (1 mile = 5280 feet, 1 foot = 12 inches)

$$1.66 \times 10$$^{6}$$ inches

Question 1

Which of the following best describes the difference between measured and exact numbers in chemistry?

Accepted Answer

Exact numbers have no uncertainty, while measured numbers always have some uncertainty.

Question 2

A student measures the length of a caterpillar as shown in the image. If the ruler has fewer hash marks, what does this imply about the measurement?

Accepted Answer

The measurement will have more uncertainty and less precision.

Question 3

Which of the following is an example of an exact number?

Accepted Answer

24 students in a class

Question 4

A graduated cylinder contains a green liquid. To correctly measure the volume, where should you read the measurement?

Accepted Answer

At the meniscus

Question 5

Which statement about accuracy and precision is correct?

Accepted Answer

Accuracy refers to how close a measurement is to the true value, while precision refers to how close repeated measurements are to each other.

Question 6

Convert 0.00034 to scientific notation.

Accepted Answer

$$3.4 	imes 10$$^{-4}$$

Question 7

How many significant figures are in the measurement 0.03070 g?

Accepted Answer

4

Question 8

A hospital has 125 deciliter bags of blood plasma. What is the volume expressed in milliliters?

Accepted Answer

$$1.25 	imes 10$$^{4}$$ mL

Question 9

A marathon is 26.2 miles long. How many inches are in the marathon? (1 mile = 5280 feet, 1 foot = 12 inches)

Accepted Answer

$$1.66 	imes 10$$^{6}$$ inches

Question 10

A concrete block measures 7.36 cm long, 5.23 cm wide, and 1.2 cm thick. What is the volume in cubic centimeters?

Accepted Answer

$$46$$ $$cm^{3}$

Question 11

A cube of silver is 5.00 cm on a side and has a density of 10.5 g/cm$$^3. $$What is the mass of the silver?

Accepted Answer

$$1310 g$$

Question 12

If an object sinks in water, what can you conclude about its density?

Accepted Answer

Its density is greater than 1.00 g/mL.

Question 13

Sterling silver contains both silver and copper metals. If a pendant contains 18.5 g of silver and 1.5 g of copper, what is the percent silver?

Accepted Answer

$$92.5\%$$

Question 14

Which metric prefix represents $$10^{-6}$$?

Accepted Answer

micro (\mu)

Question 15

A foundation for a new house measures 14 m long, 15 cm thick, and has a total volume of 23.1 m$$^3. $$What is the width of the home? (Convert thickness to meters first)

Accepted Answer

$$110 m$$

Question 16

Which of the following conversion factors is considered an exact equivalent?

Accepted Answer

1 foot = 12 inches

Question 17

What is the correct answer to $$4.273 \div 1.2$$ with the proper number of significant figures?

Accepted Answer

$$3.6$$

Question 18

Which liquid will be at the bottom of a graduated cylinder if three liquids are poured in with densities: ethanol (0.789 g/mL), water (1.00 g/mL), and chloroform (1.48 g/mL)?

Accepted Answer

Chloroform

Question 19

Express the mass of a 325 mg aspirin tablet in grams.

Accepted Answer

$$0.325 g$$

Question 20

A shed has a volume of 326 ft$$^3. $$Express this in m$$^3. (1 ft$^3 = 0.0283 m$^3)$$

Accepted Answer

$$9.22$$ $$m^{3}$

Measurement and Problem Solving: Structured Study Notes for Introductory Chemistry

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