Mastering Chemistry Chapter 2

The metric base unit for length is the

meter

Is the density of the gray cube the same, lower than, or higher than that of the green cube?

The density of the gray cube is

higher than that of the green cube

Is the density of the green cube the same, lower than, or higher than that of the gray cube?

The density of the green cube is

Higher than that of the gray cube.

A 5.23 g sample of a metal occupies 0.27 mL. Calculate the density of the metal.

19 g/mL

Which of the following substances would float on water?

Note: Water has a density of 1.0 g/mL.

0.82 g/mL

Why can two conversion factors be written for an equality such as 1 kg=1000 g?

A conversion factor can be inverted to give a second conversion factor: 1 kg/1000 g and 1000 g/1 kg

Which of the following is a conversion factor for the following statement? A dosage for an antibiotic is 270 mg for 50 kg of body weight.

270 mg antibiotic 50 kg body weight

PART A: centimeters and inches

PART B: kilometers and miles

PART C: kilograms and pounds

PART D: liters and deciliters

PART E: micrograms and grams

PART A:Equality: 1 in.=2.54 cm; Conversion factors: 2.54 cm/1 in. and 1 in./2.54 cm

PART B:Equality: 1 km=0.621 mi; Conversion factors: 0.621 mi/1 km and 1 km/0.621 mi

PART C:Equality: 1 kg=2.20 lb; Conversion factors: 2.20 lb/1 kg and 1 kg/2.20 lb

PART D:Equality: 1 L=10 dL; Conversion factors: 10 dL/1 L and 1 L/10 dL

PART E:Equality: 1 g=1×10^6 μg; Conversion factors: 1×10^6 μg/1 g and 1 g/1×10^6 μg

PART A: centimeters and millimeters

PART B: nanograms and grams

PART C: liters and milliliters

PART D:seconds and microseconds

PART E:milliliters and microliters

PART A:Equality: 1 cm=10 mm; Conversion factors: 10 mm/1 cm and 1 cm/10 mm

PART B:Equality: 1 g=1×10^9 ng; Conversion factors: 1×10^9 ng/1 g and 1 g/1×10^9 ng

PART C:Equality: 1 L=1000 mL; Conversion factors: 1000 mL/1 L and 1 L/1000 mL

PART D:Equality: 1 s=1×10^6 μs; Conversion factors: 1×10^6 μs/1 s and 1 s/1×10^6 μs

PART E:Equality: 1 mL=1000 μL; Conversion factors: 1000 μL/1 mL and 1 mL/1000 μL

How many deciliters (dL) are in 1 liter (L)?

10 dL

Which of the following is the smallest unit?

microgram

PART A: 2.5805 m
Express your answer using two significant figures.

PART B: 1.858×10^2 g

PART C: 0.004412 mL

PART D: 3 L

PART A: 2.6 m

PART B: 1.9×10^2 g

PART C: 0.0044 mL

PART D: 3.0 L

Which of the following setups would convert centimeters to feet?

cm× 1 in/2.54 cm × 1 ft/12 in

The EPA limit for lead in the soil of play areas is 400 ppm. This is the same as

400 mg lead in each kilogram of soil.

Which one of the following substances will float in gasoline, which has a density of 0.66 g/mL?

balsa wood (density = 0.16 g/mL)

What is the mass of 2.00 L of an intravenous glucose solution with a density of 1.15 g/mL?

2.30 kg

In which of the following pairs do both numbers contain the same number of significant figures?

0.00012 s and 12000 s
0.0250 m and 0.205 m

PART A: There are 31 students in the laboratory.

PART B: The oldest known flower lived 1.20×10^8 years ago.

PART C: The largest gem ever found, an aquamarine, has a mass of 104 kg.

PART D:A laboratory test shows a blood cholesterol level of 184 mg/dL.

PART A: exact

PART B:measured

PART C:measured

PART D:measured

A calculator answer of 423.6059 must be rounded off to three significant figures. What answer is reported?

424

A graduated cylinder contains three liquids A, B, and C, which have different densities and do not mix: mercury (D = 13.6 g/mL), vegetable oil (D = 0.92 g/mL), and water (D = 1.00 g/mL).
Identify the liquids A, B, and C in the cylinder.

A is vegetable oil, B is water, C is mercury.