Question 1

Which of the following best describes a chemical, as defined in chemistry?

Accepted Answer

A substance that has the same composition and properties wherever it is found.

Question 2

Which of the following is NOT a recommended strategy for successful learning in chemistry?

Accepted Answer

Cramming for an exam the night before.

Question 3

A forensic scientist analyzes a blood sample to determine its chemical composition. This is an example of chemistry being used to:

Accepted Answer

Study the structure and reactions of matter.

Question 4

A bullet contains 0.5 g of tin, 11.6 g of lead, and 0.4 g of antimony. What is the percentage of lead in the bullet? (Round to one decimal place)

Accepted Answer

92.8%

Question 5

Which of the following actions would NOT be helpful for learning chemistry effectively?

Accepted Answer

Procrastinating on assignments.

Question 6

Which of the following is the correct scientific notation for 425,000?

Accepted Answer

$$4.25 	imes 10^5$

Question 7

If $$T_f = 1.8T_c + 32$$ and $$T_f = 212$$, what is $$T_c$$?

Accepted Answer

$$T_c = 100$$

Question 8

Which of the following is a real-world example of a chemical reaction?

Accepted Answer

A tablet fizzing when dropped into water.

Question 9

A toothpaste contains 0.75 g of sodium lauryl sulfate in a 150 g tube. What is the percentage of sodium lauryl sulfate in the toothpaste?

Accepted Answer

0.5%

Question 10

Which of the following is the correct scientific notation for 0.00000039?

Accepted Answer

$$3.9 	imes 10$$^{-7}$$

Question 11

Which of the following best describes the role of hemoglobin in the blood from a chemical perspective?

Accepted Answer

It transports oxygen to tissues and carbon dioxide to the lungs.

Question 12

Which of the following is the correct way to write 0.00730 in scientific notation?

Accepted Answer

$$7.30 	imes 10$$^{-3}$$

Question 13

A student calculates the slope of a line on a graph as $$\frac{\Delta y}{\Delta x}. If$$ $$y$$ increases by 20 units when $$x$$ increases by 4 units, what is the slope?

Accepted Answer

$$5$$

Question 14

Which of the following is a common misconception about chemicals?

Accepted Answer

All chemicals are dangerous and should be avoided.

Question 15

A person has about $$1 	imes 10^5$ hairs on their scalp. Each hair is about 8$$ 	imes $$10^{-6} m $$wide. What is the total width of all hairs if placed side by side?

Accepted Answer

$$8 	imes 10$$^{-1}$$ m

Question 16

Which of the following is NOT a key math skill needed for chemistry?

Accepted Answer

Memorizing historical dates

Question 17

Which of the following is the correct scientific notation for the mass of a typical human, 68 kg?

Accepted Answer

$$6.8 	imes 10^1$ kg

Question 18

Which of the following is an example of making your studying and learning active?

Accepted Answer

Solving end-of-chapter problems regularly.

Question 19

If $$12 - (-5) = 17$$, which of the following is also true based on the rules for positive and negative numbers?

Accepted Answer

$$-12 - (-5) = -7$$

Question 20

Which of the following is the best example of chemistry solving a real-world problem?

Accepted Answer

Developing an antacid tablet to neutralize stomach acid.

Chapter 1: Chemistry in Our Lives – Foundations and Key Math Skills

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