Question 1

Which of the following best describes the difference between science and technology?

Accepted Answer

Science is the process of seeking an understanding of the underlying principles of nature, while technology is the direct application of that knowledge to solve problems.

Question 2

Which of the following is an example of a chemical change?

Accepted Answer

A bicycle left outdoors begins to rust.

Question 3

A hypothesis in science must be:

Accepted Answer

Testable

Question 4

Which of the following statements is a scientific law?

Accepted Answer

The total mass of substances present at the end of a chemical process is the same as the mass of substances present before the process took place.

Question 5

Which of the following is NOT a pure substance?

Accepted Answer

Air

Question 6

Which of the following best describes a homogeneous mixture?

Accepted Answer

A mixture that is uniform in composition throughout.

Question 7

Which of the following is the correct formula for density?

Accepted Answer

$$d = \frac{m}{V}$$

Question 8

A 10.0-g sample of which of the following substances would have the greatest volume? (Assume densities: gold = 19.3 g/mL, aluminum = 2.70 g/mL, water = 1.00 g/mL, ethanol = 0.789 g/mL)

Accepted Answer

Ethanol

Question 9

Which state of matter is composed of particles that are free to move about, but remain close together?

Accepted Answer

Liquid

Question 10

When one travels from Earth to the moon, one’s mass ______ and one’s weight ______.

Accepted Answer

remains the same / decreases

Question 11

Which of the following is a correct conversion for 1.83 kg to grams?

Accepted Answer

$$1.83 	imes 10^3$ g

Question 12

A sample of acetone has a volume of 511 mL. What is the volume in cubic inches? (1 in$$^3 = 16.387 mL)$$

Accepted Answer

31.2 in$$^3$$

Question 13

Which of the following is an example of applied research?

Accepted Answer

Developing more than 300 products from peanuts to solve agricultural problems.

Question 14

Which of the following is the correct equation to convert Celsius temperature to Kelvin?

Accepted Answer

$$T_K = T_C + 273.15$$

Question 15

A box measures 3.0 ft on each side. If the density of helium gas at 300 K is 0.164 g/L, what mass of helium, in kilograms, could be contained in the box? (1 ft = 30.48 cm, 1 L = 1000 cm$$^3)$$

Accepted Answer

0.13 kg

Question 16

Which of the following is a physical property?

Accepted Answer

Boiling point

Question 17

Which of the following is the smallest mass?

Accepted Answer

100 mg

Question 18

Which of the following is an example of a risk–benefit analysis in chemistry?

Accepted Answer

Evaluating whether the short-term use of ketorolac is appropriate for a young, healthy patient after surgery.

Question 19

Which of the following is a correct conversion for 2.5 hours to minutes?

Accepted Answer

150 min

Question 20

Which of the following best describes a scientific theory?

Accepted Answer

A model for the way nature is that tries to explain not merely what nature does, but why or how.

Introductory Chemistry Study Guide: Chapter 1 and Metric System

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