chapter 1 AP CHEMISTRY

1. The volume of a regular cylinder is V =πr2h. Using the value 3.1416 for the constant π, the volume (cm3) of a cylinder of radius 2.34 cm and height 19.91 cm expressed to the correct number of significant figures is __________.

• A) 342.49471

• B) 342.495

• C) 342.49

• D) 343

• E) 342

2. There are __________ significant figures in the answer to the following computation. _(29.2- 20.0)(1.79 X 10⁵)

1.39

• A) 1

• B) 2

• C) 3

• D) 4

• E) 5

3) The density of a 167.4 g sample of magnesium having a volume of 96.32 ml is __________ g/cm³.

• A) 0.5754

• B) 7128

• C) 3.625

• D) 2.663

• E) 1.738

4.) The output of a plant is 4335 pounds of ball bearings per week (five days). If each ball bearing weighs 0.0113 g, how many ball bearings does the plant make in a single day? (Indicate the number in proper scientific notation with the appropriate number of significant figures.)

• A) 3.84 × 10⁵

• B) 7.67 × 10⁴

• C) 867

• D) 3.49 × 10⁷

• E) 2.91 × 10⁶

5) The density of mercury is 13.6 g/cm³. The density of mercury is __________ kg/m³.

• A) 1.36 × 10^-2

• B) 1.36 × 10⁴

• C) 1.36 × 10⁸

• D) 1.36 × 10^-5

• E) 1.36 × 10^-4

6.) The distance from the Earth to the Moon is approximately 240,000 miles. If a rocket travels at a speed of 7.50 km/sec, it will take __________ days to travel between the Earth and Moon.

• A) 0.60

• B) 1.7

• C) 3.9

• D) 7.3

• E) 5.6

7) 1.55 kg/m³ is equivalent to __________ g/L.

• A) 3.58 x 10¹²

• B) 1.95 x 10³

• C) 6.83

• D) 1.60 x 10⁹

• E) 1.55

8) An iron mine produces 1.67 x 10⁴ tons of raw ore per day. If the ore is 26.39% elemental iron, the mine produces __________ pounds of elemental iron per year. (Assume the mine operates 365 days per year.)

• A) 1.221 x 10¹⁰

• B) 8.814 x 10⁶

• C) 3.217 x 10⁹

• D) 1.611 x 10⁶

• E) 3.66 x 10¹¹

Tags

NGSS.HS-ESS3-2

9) A 4.369 g sample of metal is placed in a flask. Water is added to the flask and the total volume in the flask is read to be 126.4 ml. The mass of the water, flask, and metal is 268.5 g. If the mass of the flask is 139.3 g and the density of water is 1.000 g/ml, the density of the solid is __________ g/cm³.

• A) 0.366

• B) 1.56

• C) 0.641

• D) 2.73

• E) 3.21

10) The quantity 1.0 mg/cm² is the same as 1.0 × __________ kg/m².

• A) 10^-4

• B) 10⁴

• C) 10-⁶

• D) 10^-2

• E) 104