$$3.4 \times 10^3$\ \mu\text{m}$$

$$1\ \text{m} = 100\ \text{cm}$$

Question 1

Which of the following best describes a compound?

Accepted Answer

A substance composed of atoms of two or more different elements chemically combined in fixed proportions.

Question 2

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

Accepted Answer

Density

Question 3

A student measures the mass of a sample as 21.32 g, 21.33 g, 21.32 g, and 21.31 g. The true mass is 21.59 g. Which statement is correct?

Accepted Answer

The measurements are precise but not accurate.

Question 4

Which separation technique would be most appropriate to separate a mixture of sand and salt water?

Accepted Answer

Filtration

Question 5

Convert 0.34 cm to micrometers ($$\mum).$$

Accepted Answer

$$3.4 	imes 10^3$\ \mu	ext{m}$$

Question 6

Which of the following is the correct formula for calculating kinetic energy?

Accepted Answer

$$KE = \frac{1}{2} m v^2$

Question 7

A box has dimensions 3.6 cm × 2.45 cm × 10.0 cm. What is its volume, rounded to the correct number of significant figures?

Accepted Answer

$$88\ 	ext{cm}^3$$

Question 8

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

Accepted Answer

Melting of ice

Question 9

Which of the following is an exact number?

Accepted Answer

2.54 cm in an inch

Question 10

A sample of ether has a mass of 45 g and a density of 0.71 g/mL. What volume does it occupy?

Accepted Answer

$$63\ 	ext{mL}$$

Question 11

Which of the following best describes a homogeneous mixture?

Accepted Answer

A mixture with uniform composition throughout the sample

Question 12

Which of the following is the correct relationship between Celsius and Kelvin?

Accepted Answer

$$K = ^\circ C + 273.15$$

Question 13

A fastball is thrown at 105.1 miles per hour. What is this speed in feet per second?

Accepted Answer

$$154.1\ 	ext{ft/s}$$

Question 14

Which of the following is a chemical property?

Accepted Answer

Ability to react with oxygen

Question 15

Which of the following is the SI base unit for mass?

Accepted Answer

Kilogram (kg)

Question 16

Which metric prefix represents $$10^{-6}$$?

Accepted Answer

Micro-

Question 17

Which of the following is the correct formula for density?

Accepted Answer

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

Question 18

Which of the following is a heterogeneous mixture?

Accepted Answer

Salad with dressing

Question 19

Which of the following is the correct rule for significant figures in multiplication and division?

Accepted Answer

The answer should have as many significant figures as the number with the fewest significant figures.

Question 20

Which of the following is a correct conversion factor for changing from centimeters to meters?

Accepted Answer

$$1\ 	ext{m} = 100\ 	ext{cm}$$

Chapter 1: Introduction to Matter, Energy, and Measurement – Study Notes

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