Q: Convert 0.0057 to scientific notation and state the number of significant figures.

$5.7 \times 10^{-3}$, 2 significant figures

Q: What is the equivalence statement for converting cubic centimeters to cubic meters?

$1 \text{ cm}^3 = 1 \times 10^{-6} \text{ m}^3$

Q: Which conversion factor would you use to convert inches to centimeters?

$1 \text{ in.} = 2.54 \text{ cm}$

Question 1

Which of the following is the correct SI base unit and abbreviation for measuring temperature?

Accepted Answer

Kelvin (K)

Question 2

A graduated cylinder is used to measure volume. What feature makes it more accurate than a volumetric flask?

Accepted Answer

It has graduations (incremental markings) for volume.

Question 3

Convert 0.0057 to scientific notation and state the number of significant figures.

Accepted Answer

$5.7 	imes 10^{-3}$, 2 significant figures

Question 4

A sample of gold has a mass of 155 g and a volume of 8.00 cm$^3$. What is its density in g/cm$^3$?

Accepted Answer

$19.4$ g/cm$^3$

Question 5

Which of the following numbers has 4 significant figures?

Accepted Answer

0.2920

Question 6

A student measures the mass of a sample four times and gets: 2.52 g, 2.48 g, 2.42 g, 2.55 g. The actual mass is 2.50 g. Which statement best describes the data?

Accepted Answer

Good accuracy and good precision

Question 7

What is the equivalence statement for converting cubic centimeters to cubic meters?

Accepted Answer

$1 	ext{ cm}^3 = 1 	imes 10^{-6} 	ext{ m}^3$

Question 8

If a measurement is reported as 2.49 mL ± 0.01 mL, what does the ± 0.01 mL represent?

Accepted Answer

The uncertainty in the measurement

Question 9

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

Accepted Answer

Micro (μ)

Question 10

A woman has a mass of 115 lb. What is her mass in grams? (1 kg = 2.2 lb)

Accepted Answer

$5.2 	imes 10^4$ g

Question 11

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

Accepted Answer

There are 12 eggs in a dozen.

Question 12

When multiplying 7.3 cm by 0.002 cm, how many significant figures should the answer have?

Accepted Answer

1 significant figure

Question 13

What is the mass in grams of a 325 mg aspirin tablet? Report your answer with the correct number of significant figures.

Accepted Answer

$0.325$ g

Question 14

Which of the following statements about significant figures is TRUE?

Accepted Answer

Zeroes at the end of a number are significant if a decimal point is written.

Question 15

A hospital has 125 deciliters of blood plasma. What is the volume in milliliters?

Accepted Answer

$1.25 	imes 10^4$ mL

Question 16

Which of the following best describes the difference between accuracy and precision?

Accepted Answer

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

Question 17

Earth's oceans contain approximately $1.36 	imes 10^9$ km$^3$ of water. Calculate the volume in liters.

Accepted Answer

$1.36 	imes 10^{21}$ L

Question 18

Which conversion factor would you use to convert inches to centimeters?

Accepted Answer

$1 	ext{ in.} = 2.54 	ext{ cm}$

Chapter 1: Introduction to Matter, Energy, and Measurement – General Chemistry Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards