$$KE = \frac{1}{2} \times 2 \times 3^2$

$$1 \text{ inch} = 2.54 \text{ cm}$$

$$1 \text{ km} \times \frac{1 \times 10^3$ \text{ m}}{1 \text{ km}}$$

Question 1

Which of the following is an example of an intensive property of matter?

Accepted Answer

Density

Question 2

A nurse is interested in how ibuprofen affects patient care. Which aspect of chemistry is most directly relevant to this scenario?

Accepted Answer

The study of chemical reactions and drug interactions

Question 3

Which of the following best describes a homogeneous mixture?

Accepted Answer

A mixture with uniform composition throughout

Question 4

Which separation technique would be most appropriate for separating sand from water?

Accepted Answer

Filtration

Question 5

Which of the following is a chemical change?

Accepted Answer

Rusting of iron

Question 6

A sample of concrete contains sand, gravel, and mortar. How is this sample best classified?

Accepted Answer

Heterogeneous mixture

Question 7

Which of the following correctly expresses the kinetic energy of a 2 kg object moving at 3 m/s?

Accepted Answer

$$KE = \frac{1}{2} 	imes 2 	imes 3^2$

Question 8

Which of the following is the correct conversion factor to change inches to centimeters?

Accepted Answer

$$1 	ext{ inch} = 2.54 	ext{ cm}$$

Question 9

Which of the following statements about significant digits is correct?

Accepted Answer

Trailing zeros are only significant if there is a decimal point.

Question 10

A scientist measures the mass of a carbon atom as $$1.992 	imes 10$$^{-23}$$ g. How many significant digits are in this measurement?

Accepted Answer

4

Question 11

Which of the following is NOT a SI base unit?

Accepted Answer

Liter

Question 12

Which of the following best describes the scientific approach to knowledge?

Accepted Answer

Develop a hypothesis, run experiment, interpret result, adapt theory

Question 13

Which of the following is a correct expression for converting Fahrenheit to Celsius?

Accepted Answer

$$T(\degree C) = (T(\degree F) - 32)/1.8$$

Question 14

Which of the following is an example of a physical transformation?

Accepted Answer

Melting ice

Question 15

A jewelry gold alloy is described as a solution of Au/Cu. How is this best classified?

Accepted Answer

Homogeneous mixture

Question 16

Which of the following is the correct SI prefix for $$10^{-6}$$?

Accepted Answer

micro

Question 17

Which of the following is true about accuracy and precision?

Accepted Answer

Precision is easy to estimate by repeating experiments under the same conditions.

Question 18

A student measures the volume of a liquid as 20.46 mL using a burette. How many significant digits does this measurement have?

Accepted Answer

4

Question 19

Which of the following is the correct formula for density?

Accepted Answer

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

Question 20

Which of the following is a correct example of dimensional analysis for converting 1 km to meters?

Accepted Answer

$$1 	ext{ km} 	imes \frac{1 	imes 10^3$ 	ext{ m}}{1 	ext{ km}}$$

Chapter 1: Matter and Measurement – General Chemistry Study Notes

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