Question 1

38.325 lbs = ________ grams.(1 lb = 454 g)

Accepted Answer

The answer of 38.325 lbs = ________ grams.(1 lb =...

Question 2

Identify the common substance that has the lowest density.

Accepted Answer

A) ice 
B) aluminum 
C) copper 
D) table salt 
E) sugar 
A) ice 
B) aluminum 
C) copper 
D) table salt 
E) sugar

Question 3

Ethylene glycol is commonly used as antifreeze in the cooling systems of vehicles due to its low freezing point,8.6 °F.What is the freezing point in K?

Accepted Answer

A) 280 K 
B) -13 K 
C) 260 K 
D) 273 K 
E) 240 K 
A) 280 K 
B) -13 K 
C) 260 K 
D) 273 K 
E) 240 K

Question 4

Which of the following volumes is equal to 40 mL?

Accepted Answer

A) 40 cm3 
B) 40 dm3 
C) 0.40 L 
D) 0.00040 kL 
A) 40 cm3 
B) 40 dm3 
C) 0.40 L 
D) 0.00040 kL

Question 5

If the speed limit is 40 miles per hour,calculate the speed limit in kilometres per hour.(1 km = 0.6214 miles)

Accepted Answer

A) 95 km h-1 
B) 64 km h-1 
C) 80 km h-1 
D) 35 km h-1 
E) 60 km h-1 
A) 95 km h-1 
B) 64 km h-1 
C) 80 km h-1 
D) 35 km h-1 
E) 60 km h-1

Question 6

A substance composed of two or more elements in a fixed,definite proportion is

Accepted Answer

A) a homogeneous mixture. 
B) a heterogeneous mixture. 
C) a compound. 
D) a solution. 
E) an alloy. 
A) a homogeneous mixture. 
B) a heterogeneous mixture. 
C) a compound. 
D) a solution. 
E) an alloy.

Question 7

Crude oil is an example of

Accepted Answer

A) a compound. 
B) an element. 
C) a heterogeneous mixture. 
D) a homogeneous mixture. 
A) a compound. 
B) an element. 
C) a heterogeneous mixture. 
D) a homogeneous mixture.

Question 8

If the outside temperature is 35 °C,what is the temperature in K?

Accepted Answer

A) -238 K 
B) 308 K 
C) 95 K 
D) 31 K 
E) 63 K 
A) -238 K 
B) 308 K 
C) 95 K 
D) 31 K 
E) 63 K

Question 9

What answer should be reported,with the correct number of significant figures,for the following calculation? 
100 × 10-1.4 + log(1.6 × 102)

Accepted Answer

A) 6.2 
B) 6.19 
C) 6.18 
D) 6 
E) 6.185 
A) 6.2 
B) 6.19 
C) 6.18 
D) 6 
E) 6.185

Question 10

What answer should be reported,with the correct number of significant figures,for the following calculation? 
(433.621 - 333.9)× 11.900

Accepted Answer

A) 1.19 × 103 
B) 1.187 × 103 
C) 1.1868 × 103 
D) 1.18680 × 103 
E) 1.186799 × 103 
A) 1.19 × 103 
B) 1.187 × 103 
C) 1.1868 × 103 
D) 1.18680 × 103 
E) 1.186799 × 103

Question 11

Systematic error is defined as

Accepted Answer

A) error that tends to be consistently too high or too low. 
B) error that has equal probability of being too high or too low. 
C) error that averages out with repeated trials. 
D) error that is random. 
A) error that tends to be consistently too high or too low. 
B) error that has equal probability of being too high or too low. 
C) error that averages out with repeated trials. 
D) error that is random.

Question 12

The diameter of an atom is approximately 1 × 10-10 m.What is the diameter in millimeters?

Accepted Answer

A) 1 × 10-16 mm 
B) 1 × 10-13 mm 
C) 1 × 10-7 mm 
D) 1 × 10-4 mm 
A) 1 × 10-16 mm 
B) 1 × 10-13 mm 
C) 1 × 10-7 mm 
D) 1 × 10-4 mm

Question 13

A sample of liquid isopropyl alcohol is placed in a sealed container.Some of the volatile isopropyl alcohol vaporizes.Does the mass of the sealed container and its contents change during the vaporization? Explain.

Accepted Answer

No.The vaporized isopropyl alcohol is ju

Question 14

Which of the following is an SI base unit?

Accepted Answer

A) volt 
B) gram 
C) hour 
D) kelvin 
E) dozen 
A) volt 
B) gram 
C) hour 
D) kelvin 
E) dozen

Question 15

Ampere is a measure of

Accepted Answer

A) luminous intensity. 
B) amount. 
C) mass. 
D) length. 
E) current. 
A) luminous intensity. 
B) amount. 
C) mass. 
D) length. 
E) current.

Question 16

The factor 1,000,000 corresponds to which prefix?

Accepted Answer

A) deka 
B) deci 
C) mega 
D) milli 
A) deka 
B) deci 
C) mega 
D) milli

Question 17

Choose the pure substance from the list below.

Accepted Answer

A) tea 
B) a casserole 
C) carbon monoxide 
D) sugar water 
E) pomegranate juice 
A) tea 
B) a casserole 
C) carbon monoxide 
D) sugar water 
E) pomegranate juice

Question 18

Which of the following is an example of extensive properties?

Accepted Answer

A) mass 
B) colour 
C) density 
D) temperature 
E) taste 
A) mass 
B) colour 
C) density 
D) temperature 
E) taste

Question 19

Ethylene glycol is commonly used as antifreeze in the cooling systems of vehicles due to its low freezing point,8.6 °F.What is the freezing point in °C?

Accepted Answer

A) 0.0°C 
B) -13°C 
C) -26°C 
D) -45°C 
E) -54°C 
A) 0.0°C 
B) -13°C 
C) -26°C 
D) -45°C 
E) -54°C

Question 20

Read the length of the metal bar with the correct number of significant figures.

Accepted Answer

A) 20 cm 
B) 15 cm 
C) 15.0 cm 
D) 15.00 cm 
E) 15.000 cm 
A) 20 cm 
B) 15 cm 
C) 15.0 cm 
D) 15.00 cm 
E) 15.000 cm

Exam 1: Units of Measurement for Physical and Chemical Change

38.325 lbs = ________ grams.(1 lb = 454 g)

Identify the common substance that has the lowest density.

Ethylene glycol is commonly used as antifreeze in the cooling systems of vehicles due to its low freezing point,8.6 °F.What is the freezing point in K?

Which of the following volumes is equal to 40 mL?

If the speed limit is 40 miles per hour,calculate the speed limit in kilometres per hour.(1 km = 0.6214 miles)

A substance composed of two or more elements in a fixed,definite proportion is

Crude oil is an example of

If the outside temperature is 35 °C,what is the temperature in K?

What answer should be reported,with the correct number of significant figures,for the following calculation? 100 × 10-1.4 + log(1.6 × 102)

What answer should be reported,with the correct number of significant figures,for the following calculation? (433.621 - 333.9)× 11.900

Systematic error is defined as

The diameter of an atom is approximately 1 × 10-10 m.What is the diameter in millimeters?

A sample of liquid isopropyl alcohol is placed in a sealed container.Some of the volatile isopropyl alcohol vaporizes.Does the mass of the sealed container and its contents change during the vaporization? Explain.

Which of the following is an SI base unit?

Ampere is a measure of

The factor 1,000,000 corresponds to which prefix?

Choose the pure substance from the list below.

Which of the following is an example of extensive properties?

Ethylene glycol is commonly used as antifreeze in the cooling systems of vehicles due to its low freezing point,8.6 °F.What is the freezing point in °C?

Read the length of the metal bar with the correct number of significant figures.

Atoms and Elements

Molecules,compounds,and Nomenclature

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding II: Molecular Shapes, valence Bond Theory, and Molecular Orbital Theory

Liquids, solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry II: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

What answer should be reported,with the correct number of significant figures,for the following calculation? 100 × 10^-1.4 + log(1.6 × 10²)

The diameter of an atom is approximately 1 × 10^-10 m.What is the diameter in millimeters?