Chapter 1 The Chemical World © 2012 Pearson Education, Inc.

Chapter 1The Chemical World

© 2012 Pearson Education, Inc.

© 2012 Pearson Education, Inc.

a. observations and experimentation. b. facts and scientific laws.c. theories and opinions.d. hypotheses and models.e. None of the above

1.4 The scientific method emphasizes

© 2012 Pearson Education, Inc.

a. Observationb. Scientific methodc. Scientific lawd. Scientific theorye. Hypothesis

1.5 Which term best fits the following definition: “A theory before it has become well established”?

© 2012 Pearson Education, Inc.

a. Observe some aspect of nature.b. Develop a scientific hypothesis.c. Design a detailed experiment.d. Check the results in triplicate.e. Develop a scientific law to summarize

observations.

1.7 What is the first step in the scientific method?

© 2012 Pearson Education, Inc.

a. All matter contains the same mass.b. Matter can be converted to less massive things.c. Matter can be converted to more massive

things. d. Mass is neither created nor destroyed in a

chemical reaction.e. Mass can be either created or saved in a

chemical reaction.

1.9 Which of the following statements best describes the Law of Conservation of Mass?

© 2012 Pearson Education, Inc.

a. Lead b. Salt c. Card. Chaire. All of the above

1.10 Which of the following can be classified as matter?

© 2012 Pearson Education, Inc.

a. 4.59 × 104

b. 0.459 × 103

c. 4.59 × 10–3

d. 4.59 × 10–4

e. 4.59 × 10–5

2.1 Convert 0.000459 to scientific notation.

© 2012 Pearson Education, Inc.

a. 3.23b. 32.3c. 323 d. 0.00323e. 3230

2.3 Convert 3.23 × 103 to decimal notation.

© 2012 Pearson Education, Inc.

a. 0.00450 mLb. 4.51 mLc. 0.451 mLd. 45.1 mLe. 45100 mL

2.7 How many mL are in 45.1 cm3?

© 2012 Pearson Education, Inc.

a. km, kg, s, Kb. m, g, s, °C c. m, g, s, Kd. m, kg, s, °Ce. m, kg, s, K

2.13 What are the fundamental base SI units of length, mass, time, and temperature respectively?

© 2012 Pearson Education, Inc.

a. 229 gb. 0.567 gc. 1.76 gd. 11.4 ge. 2.30 × 10–2 g

2.16 What is the mass of a sample of lead that has a density of 11.4 g/mL and displaces 20.1 mL of water?

© 2012 Pearson Education, Inc.

a. Copper b. Lead c. Gold d. Aluminume. Platinum

2.17 What is the identity of an unknown object that has a mass of 1080 g and displaces 50.5 cm3 of water? (See Table 2.4)

© 2012 Pearson Education, Inc.

a. g/L b. kg/L c. g/mL d. cm3/mLe. g/m3

2.19 Which of the following is a frequently used unit for the density of liquids and solids?

© 2012 Pearson Education, Inc.

a. 57.36 mLb. 0.0574 mLc. 0.574 mLd. 573.6 mL

2.30 What is the volume of 54.50 g of a liquid with a density of 0.9502 g/mL?