Q: Which of the following is the correct definition of density?

$$\text{Density} = \frac{\text{mass}}{\text{volume}}$$

Q: Which of the following is the correct formula for converting Fahrenheit to Celsius?

$$^\circ C = (^\circ F - 32) \times \frac{5}{9}$$

Q: A chemist needs to convert 5.0 cm$$^3 to m$^3. $$Which conversion factor should be used?

$$1\ \text{cm}^3 = 1 \times 10$$^{-6}$$\ \text{m}^3$$

Question 1

Which of the following best explains why graphite and diamond, both made of carbon, have such different properties?

Accepted Answer

Their atoms are arranged in different structures.

Question 2

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

Accepted Answer

Rusting of iron

Question 3

A sample of matter is found to have a fixed volume and a rigid shape. Which state of matter does this sample most likely represent?

Accepted Answer

Solid

Question 4

Which of the following is a homogeneous mixture?

Accepted Answer

Sweetened tea

Question 5

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

Accepted Answer

Distillation

Question 6

Which of the following is an intensive property?

Accepted Answer

Density

Question 7

Convert 25.0 °C to Kelvin using the appropriate formula.

Accepted Answer

$$K = ^\circ C + 273.15 = 25.0 + 273.15 = 298.15\ K$$

Question 8

Which of the following is the correct definition of density?

Accepted Answer

$$	ext{Density} = \frac{	ext{mass}}{	ext{volume}}$$

Question 9

A student measures the mass of a metal sample as 12.34 g and its volume as 4.56 mL. What is the density of the metal, reported to the correct number of significant figures?

Accepted Answer

$$2.7\ g/mL$$

Question 10

Which of the following statements about significant figures is correct?

Accepted Answer

Leading zeroes are not significant.

Question 11

Which temperature scale does not allow for negative values?

Accepted Answer

Kelvin

Question 12

Which of the following is an example of a compound?

Accepted Answer

Water (H$$_2O)$$

Question 13

A sample of copper is heated from room temperature to 100°C. What happens to its density?

Accepted Answer

The density decreases.

Question 14

Which of the following is a physical property?

Accepted Answer

Melting point

Question 15

Which of the following is an exact number?

Accepted Answer

The number of students in a classroom

Question 16

Which prefix multiplier would be most appropriate for reporting the mass of a human adult?

Accepted Answer

Kilo-

Question 17

A student adds 12.34 g and 0.567 g. What is the correct answer, reported to the proper number of decimal places?

Accepted Answer

$$12.91\ g$$

Question 18

Which of the following best describes a heterogeneous mixture?

Accepted Answer

A mixture in which the composition varies from one region to another

Question 19

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

Accepted Answer

$$^\circ C = (^\circ F - 32) 	imes \frac{5}{9}$$

Question 20

A chemist needs to convert 5.0 cm$$^3 to m$^3. $$Which conversion factor should be used?

Accepted Answer

$$1\ 	ext{cm}^3 = 1 	imes 10$$^{-6}$$\ 	ext{m}^3$$

Chapter 1: Matter, Measurement, and Problem Solving – Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard