Chem Chap 1

10. The proprietor of a rock shop insists that a nugget is pure gold. If the nugget occupies a volume of 5.40 mL, what would its mass have to be if it were truly pure gold? (dgold = 19.3 g/mL) A) 104 g B) 3.57 g C) 0.279 g D) 13.9 g E) 197 g

A) 104 g Manipulate D=M/V

7. A package of miniature candy bars has a mass of 197 g. What is this mass in units of ounces? (16 ounces = 453.6 g) A) 6.95 oz B) 0.434 oz C) 8.94 × 104 oz D) 1.43 × 106 oz E) 2.71 × 10−2 oz

A) 6.95 oz (16 ounces = 453.6 g)

17. When the mathematical operation is carried out, how many significant figures should be reported in the answer? A) 1 B) 2 C) 3 D) 4 E) 5

B) 2 0.040 only has 2 sig figs

19. If a jet's cruising altitude is 32,200 ft (to three significant figures), this distance in km is: (1 mile = 1.61 km; 1 mile = 5280 ft) A) 9.8186 km B) 9.82 km C) 1.06 × 108 km D) 2.737 × 108 km E) 2.00 × 104 km

B) 9.82 km

6. Which of the following statements is incorrect? A) The condensation of steam on a mirror is an example of a physical change. B) The burning of a piece of charcoal to a white powder is an example of a physical change. C) Evaporation of water from a fish tank is evidence of a physical change. D) The fact that sulfur is a yellow powder is a physical property. E) The fact that copper conducts electricity is a physical property

B) The burning of a piece of charcoal to a white powder is an example of a physical change.

11. An ice cube will sink in hexane, but float in water. Place these three substances in order from least density to greatest density. A) ice < water < hexane B) hexane < ice < water D) water < hexane < ice E) water < ice < hexane

B) hexane < ice < water

14. The number 5.650 × 10−2 correctly expressed in decimal form is: A) 0.565 B) 0.0565 C) 0.05650 D) 565 E) 565.0

C) 0.05650 Don't forget the 0 at the end

18. The correct answer for the addition 102.5 mL + 6.55 mL is: (considering significant figures) A) 109.05 mL B) 109 mL C) 109.0 mL D) 109.050 mL E) 108.15 mL

C) 109.0 mL

1. Which of the following is not an example of a mixture? A) air B) iced tea C) 24-carat gold D) brass E) a person

C) 24-carat gold

12. If the temperature of water in a freezer decreases from 22°C to −25°C, what is the decrease in temperature in units of degrees Celsius and Kelvin? A) 47°C, 320 K B) 47°C, 273 K C) 47°C, 47 K D) 3°C, 276 K E) 3°C, 3 K

C) 47°C, 47 K

8. What is the mass in kilograms of a copper pipe that weighs 12.5 pounds? (1 lb = 453.6 g) A) 0.0276 kg B) 27.6 kg D) 5.67 kg E) 1.72 × 10−3 kg

D) 5.67 kg

20. If a car is traveling at 97 km/hr, what is its speed in mi/hr? (1 mile = 1.61 km) A) 1.6 × 102 mi/hr B) 156 mi/hr C) 60.2 mi/hr D) 6.0 × 101 mi/hr E) 3600 mi/hr

D) 6.0 × 10^1 mi/hr

5. The symbol for the element sodium is ________. A) S B) So C) Sm D) Na E) Sn

D) Na

9. A bottle of Gatorade has a volume of 591 mL. What is this volume in L? A) 5.91 L B) 591,000 L C) 0.00169 L D) 1.69 L E) 0.591 L

E) 0.591 L Divided by 1000

16. The correct answer for the product (6.1 × 104) × (3312) is: (considering significant figures) A) 2.020 × 108 B) 2.02 × 108 C) 2.0 × 109 D) 2.02032 × 108 E) 2.0 × 108

E) 2.0 × 10^8

13. The number 0.005925 correctly expressed in scientific notation is: A) 59.25 × 10−4 B) 5.93 × 10−3 C) 5.9 × 10−3 D) 5.925 × 103 E) 5.925 × 10−3

E) 5.925 × 10−3

15. The number 625,000 correctly expressed in scientific notation is: A) 6.25 × 10−5 B) 6.25 × 10−4 C) 6.3 × 105 D) 6.2 × 105 E) 6.25 × 105

E) 6.25 × 105

4. Which of these elements is a nonmetal? A) Na B) Mg C) Cu D) K E) Cl

E) Cl

2. Which of these substances is an element? A) C B) CO C) N2 D) HCl E) both C and N2

E) both C and N2

3. Which of these substances is a compound? A) Co B) NI3 C) Fe D) CCl4 E) both NI3 and CCl4

E) both NI3 and CCl4