Question 1

Which of the following best describes the scope of chemistry as a science?

Accepted Answer

The study of substances in terms of their composition, structure, properties, and reactions.

Question 2

Which everyday event is NOT an example of a chemical process?

Accepted Answer

A glass of water freezes into ice.

Question 3

Which branch of chemistry would most likely study the chemical processes occurring in living organisms?

Accepted Answer

Biochemistry

Question 4

A scientist observes that a metal alloy resists corrosion better than pure iron. What is the next step in the scientific method?

Accepted Answer

Formulate a hypothesis explaining the observation.

Question 5

Which statement about chemicals is TRUE?

Accepted Answer

Chemicals are substances that always have the same composition and properties.

Question 6

Which chemical in toothpaste is responsible for inhibiting bacteria that cause plaque and gum disease?

Accepted Answer

Triclosan

Question 7

A student writes the number 0.000000000456 in scientific notation. Which is the correct representation?

Accepted Answer

$$4.56 	imes 10$$^{-10}$$

Question 8

Which of the following is the correct scientific notation for the number 708,900,000,000,000,000,000,000,000?

Accepted Answer

$$7.089 	imes 10$$^{26}$$

Question 9

Which step in the scientific method involves testing a possible explanation for an observation?

Accepted Answer

Designing and performing experiments

Question 10

If you move the decimal point 5 places to the left to convert a number to scientific notation, what is the exponent of 10?

Accepted Answer

$$5$$

Question 11

Which chemical in toothpaste is used as an abrasive to remove plaque?

Accepted Answer

Sodium carbonate

Question 12

A student solves the equation $$4x + 6 = 22. $$What is the value of $$x$$?

Accepted Answer

$$x = 4$$

Question 13

Which of the following is NOT a recommended strategy for success in a chemistry course?

Accepted Answer

Ignoring sample problems in the textbook

Question 14

Which of the following is a property that chemistry studies?

Accepted Answer

The color of a substance

Question 15

Which of the following is an example of applying the scientific method in everyday life?

Accepted Answer

Testing whether you are allergic to cats by visiting homes with cats and observing your symptoms

Question 16

Which chemical in toothpaste is responsible for giving it a pleasant wintergreen flavor?

Accepted Answer

Methyl salicylate

Question 17

If a number is less than 1 and you move the decimal point to the right to write it in scientific notation, what is true about the exponent?

Accepted Answer

The exponent is negative.

Question 18

Which branch of chemistry would most likely study the composition of rocks and minerals?

Accepted Answer

Geochemistry

Question 19

Which chemical in toothpaste is used to make it white and opaque?

Accepted Answer

Titanium dioxide

Question 20

A calculator displays the number $$5.2 	imes 10$$^{9}$$. What is the standard form of this number?

Accepted Answer

5,200,000,000

Chapter 1: Chemistry in Our Lives – Foundations and Everyday Applications

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