$$0.409 \times 10^6$ = 409,000 mg$$

Question 1

Which of the following best describes the scientific process as outlined in the study materials?

Accepted Answer

A search for understanding through careful observation and experimentation.

Question 2

Which statement about scientific theories is most accurate according to the study materials?

Accepted Answer

Theories are tentative until exhaustive proof can be generated.

Question 3

A scientist proposes a hypothesis that can be tested and potentially proven false. Which principle of critical thinking does this illustrate?

Accepted Answer

Falsifiability

Question 4

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

Accepted Answer

A bicycle left outdoors begins to rust.

Question 5

A mixture that has the same chemical composition throughout is called:

Accepted Answer

A homogeneous mixture

Question 6

Which SI base unit is used to measure temperature?

Accepted Answer

Kelvin

Question 7

Convert 0.409 kg to milligrams ($$mg).$$

Accepted Answer

$$0.409 	imes 10^6$ = 409,000 mg$$

Question 8

Which of the following is a physical property?

Accepted Answer

Water boils at $$100^\circC.$$

Question 9

A solution has a mass of 234 g and a volume of 210 mL. What is its density in $$g/mL$$?

Accepted Answer

$$\frac{234}{210} = 1.11$$ $$g/mL$$

Question 10

Which of the following is an example of basic research?

Accepted Answer

Studying the structure of DNA to understand genetic inheritance.

Question 11

Which of the following is a compound?

Accepted Answer

Sodium chloride ($$NaCl)$$

Question 12

If the boiling point of ethanol is $$78^\circC$$, what is this temperature in kelvin ($$K$$)? Use the formula $$K = ^\circ C + 273.15.$$

Accepted Answer

$$K = 78 + 273.15 = 351.15 K$$

Question 13

Which of the following claims is falsifiable?

Accepted Answer

A student claims to have memorized all the element names and symbols on the periodic table.

Question 14

Which of the following best describes the difference between mass and weight?

Accepted Answer

Mass is a measure of the amount of matter, while weight is the force of attraction between an object and Earth.

Question 15

Which prefix represents $$10^6 in $$the metric system?

Accepted Answer

mega-

Question 16

A mass of 2.61 kg is how many grams?

Accepted Answer

2,610 g

Question 17

Which of the following is NOT a characteristic of science according to the study materials?

Accepted Answer

Dogmatic

Question 18

Which of the following best describes a benefit-risk analysis in science?

Accepted Answer

A process of calculating whether something is desirable given the risks and benefits.

Question 19

If a drug has a desirability quotient ($$DQ) $$calculated as $$DQ = \frac{Benefits}{Risks}$$ and $$DQ \u003c 1$$, what does this indicate?

Accepted Answer

The risks outweigh the benefits.

Chapter 1: Foundations of Chemistry – Science, Technology, and Matter

Guida di studio - Domande di pratica