Question 1

Which of the following is the lowest temperature?

Accepted Answer

A) 42 °C 
B) 57 °F 
C) 318 K 
D) All of these temperatures are equal. 
A) 42 °C 
B) 57 °F 
C) 318 K 
D) All of these temperatures are equal.

Question 2

A student performs an experiment to determine the density of a sugar solution.She obtains the following results: 1.11 g mL-1,1.81 g mL-1,1.95 g mL-1,1.75 g mL-1.If the actual value for the density of the sugar solution is 1.75 g mL-1,which statement below best describes her results?

Accepted Answer

A) Her results are precise,but not accurate. 
B) Her results are accurate,but not precise. 
C) Her results are both precise and accurate 
D) Her results are neither precise nor accurate. 
E) It isn't possible to determine from the information given. 
A) Her results are precise,but not accurate. 
B) Her results are accurate,but not precise. 
C) Her results are both precise and accurate 
D) Her results are neither precise nor accurate. 
E) It isn't possible to determine from the information given.

Question 3

Read the water level with the correct number of significant figures.

Accepted Answer

A) 5 mL 
B) 5.3 mL 
C) 5.32 mL 
D) 5.320 mL 
E) 5.3200 mL 
A) 5 mL 
B) 5.3 mL 
C) 5.32 mL 
D) 5.320 mL 
E) 5.3200 mL

Question 4

A student performs an experiment to determine the density of a sugar solution.She obtains the following results: 1.79 g mL-1,1.81 g mL-1,1.80 g mL-1,1.81 g mL-1.If the actual value for the density of the sugar solution is 1.80 g mL-1,which statement below best describes her results?

Accepted Answer

A) Her results are precise,but not accurate. 
B) Her results are accurate,but not precise. 
C) Her results are both precise and accurate 
D) Her results are neither precise nor accurate. 
E) It isn't possible to determine from the information given. 
A) Her results are precise,but not accurate. 
B) Her results are accurate,but not precise. 
C) Her results are both precise and accurate 
D) Her results are neither precise nor accurate. 
E) It isn't possible to determine from the information given.

Question 5

Because of the high heat and low humidity in the summer in Death Valley,California,a visitor requires about one quart of water for every two miles travelled on foot.Calculate the approximate number of litres required for a person to walk 10.kilometres in Death Valley.

Accepted Answer

A) 2.9 L 
B) 12 L 
C) 30 L 
D) 47 L 
A) 2.9 L 
B) 12 L 
C) 30 L 
D) 47 L

Question 6

A person has a mass of 77.1 kg.What is his weight in pounds?

Accepted Answer

A) 154 pounds 
B) 170 pounds 
C) 35.0 pounds 
D) 162 pounds 
A) 154 pounds 
B) 170 pounds 
C) 35.0 pounds 
D) 162 pounds

Question 7

Convert 514 nm to m and express it in scientific notation.

Accepted Answer

A) 514*10-5 m 
B) 5.14*10-7 m 
C) 51.4*10-7 m 
D) 5.14*1011 m 
E) 5.14*10-9 m 
A) 514*10-5 m 
B) 5.14*10-7 m 
C) 51.4*10-7 m 
D) 5.14*1011 m 
E) 5.14*10-9 m

Question 8

Convert 46.9 GHz to THz.

Accepted Answer

A) 0.0469 THz 
B) 46900 THz 
C) 0.469 THz 
D) 4690 THz 
E) 0.000469 THz 
A) 0.0469 THz 
B) 46900 THz 
C) 0.469 THz 
D) 4690 THz 
E) 0.000469 THz

Question 9

If I wish to travel 88 mph (miles per hour)in a DeLorean.How fast would I be travelling in m s-1? (1 km = 0.6214 miles)

Accepted Answer

A) 39 m s-1 
B) 142 m s-1 
C) 129 m s-1 
D) 76 m s-1 
E) 44 m s-1 
A) 39 m s-1 
B) 142 m s-1 
C) 129 m s-1 
D) 76 m s-1 
E) 44 m s-1

Question 10

An alligator is 244.0 cm long.How long is it in feet?

Accepted Answer

A) 8.00 ft 
B) 96.0 ft 
C) 20.3 ft 
D) 6.00 ft 
E) 9.00 ft 
A) 8.00 ft 
B) 96.0 ft 
C) 20.3 ft 
D) 6.00 ft 
E) 9.00 ft

Question 11

Which of the following is the smallest volume?

Accepted Answer

A) 44 cm3 
B) 1.0 dL 
C) 5.5 × 103 mL 
D) 1.0 × 108 nL 
A) 44 cm3 
B) 1.0 dL 
C) 5.5 × 103 mL 
D) 1.0 × 108 nL

Question 12

The melting point of copper is 1984 °F.What is the melting point in K?

Accepted Answer

A) 1724 K 
B) 1631 K 
C) 1358 K 
D) 2257 K 
E) 1286 K 
A) 1724 K 
B) 1631 K 
C) 1358 K 
D) 2257 K 
E) 1286 K

Question 13

Choose the pure substance from the list below.

Accepted Answer

A) sea water 
B) sugar 
C) air 
D) lemonade 
E) milk 
A) sea water 
B) sugar 
C) air 
D) lemonade 
E) milk

Question 14

Convert 4 μm to metres.

Accepted Answer

A) 4 × 10-9 m 
B) 4 × 10-6 m 
C) 4 × 10-3 m 
D) 4 × 106 m 
A) 4 × 10-9 m 
B) 4 × 10-6 m 
C) 4 × 10-3 m 
D) 4 × 106 m

Question 15

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

Question 16

What answer should be reported,with the correct number of significant figures,for the following calculation? $$10 ^ { - 4.68 }$$

Accepted Answer

A) 2.1 × 10-5 
B) 2 09 × 10-5 
C) 2 × 10-5 
D) 2.089 × 10-5 
E) 2.0893 × 10-5 
A) 2.1 × 10-5 
B) 2 09 × 10-5 
C) 2 × 10-5 
D) 2.089 × 10-5 
E) 2.0893 × 10-5

Question 17

A chemical change

Accepted Answer

A) occurs when methane gas is burned. 
B) occurs when paper is shredded. 
C) occurs when water is vaporized. 
D) occurs when sand is mixed with water. 
E) occurs when powdered lemonade is stirred into water. 
A) occurs when methane gas is burned. 
B) occurs when paper is shredded. 
C) occurs when water is vaporized. 
D) occurs when sand is mixed with water. 
E) occurs when powdered lemonade is stirred into water.

Question 18

How many significant figures are in 3.408 × 104 m?

Accepted Answer

A) 3 
B) 4 
C) 5 
D) 7 
E) 8 
A) 3 
B) 4 
C) 5 
D) 7 
E) 8

Question 19

How many mg does a 433 kg sample contain?

Accepted Answer

A) 4.33 × 10-4 mg 
B) 4.33 × 107 mg 
C) 4.33 × 10-3 mg 
D) 4.33 × 106 mg 
E) 4.33 × 108 mg 
A) 4.33 × 10-4 mg 
B) 4.33 × 107 mg 
C) 4.33 × 10-3 mg 
D) 4.33 × 106 mg 
E) 4.33 × 108 mg

Question 20

What is the correct answer,with the proper number of significant figures,for the following calculation?
(1815 - 1806)× (9.11 × 7.92)

Accepted Answer

The answer of What is the correct answer,with the proper...

Exam 1: Units of Measurement for Physical and Chemical Change

Which of the following is the lowest temperature?

A student performs an experiment to determine the density of a sugar solution.She obtains the following results: 1.11 g mL-1,1.81 g mL-1,1.95 g mL-1,1.75 g mL-1.If the actual value for the density of the sugar solution is 1.75 g mL-1,which statement below best describes her results?

Read the water level with the correct number of significant figures.

A student performs an experiment to determine the density of a sugar solution.She obtains the following results: 1.79 g mL-1,1.81 g mL-1,1.80 g mL-1,1.81 g mL-1.If the actual value for the density of the sugar solution is 1.80 g mL-1,which statement below best describes her results?

Because of the high heat and low humidity in the summer in Death Valley,California,a visitor requires about one quart of water for every two miles travelled on foot.Calculate the approximate number of litres required for a person to walk 10.kilometres in Death Valley.

A person has a mass of 77.1 kg.What is his weight in pounds?

Convert 514 nm to m and express it in scientific notation.

Convert 46.9 GHz to THz.

If I wish to travel 88 mph (miles per hour)in a DeLorean.How fast would I be travelling in m s-1? (1 km = 0.6214 miles)

An alligator is 244.0 cm long.How long is it in feet?

Which of the following is the smallest volume?

The melting point of copper is 1984 °F.What is the melting point in K?

Choose the pure substance from the list below.

Convert 4 μm to metres.

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

What answer should be reported,with the correct number of significant figures,for the following calculation? 10−4.6810 ^ { - 4.68 }10−4.68

A chemical change

How many significant figures are in 3.408 × 104 m?

How many mg does a 433 kg sample contain?

What is the correct answer,with the proper number of significant figures,for the following calculation? (1815 - 1806)× (9.11 × 7.92)

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A student performs an experiment to determine the density of a sugar solution.She obtains the following results: 1.11 g mL^-1,1.81 g mL^-1,1.95 g mL^-1,1.75 g mL^-1.If the actual value for the density of the sugar solution is 1.75 g mL^-1,which statement below best describes her results?

A student performs an experiment to determine the density of a sugar solution.She obtains the following results: 1.79 g mL^-1,1.81 g mL^-1,1.80 g mL^-1,1.81 g mL^-1.If the actual value for the density of the sugar solution is 1.80 g mL^-1,which statement below best describes her results?

If I wish to travel 88 mph (miles per hour)in a DeLorean.How fast would I be travelling in m s^-1? (1 km = 0.6214 miles)

What answer should be reported,with the correct number of significant figures,for the following calculation? $10 ^ { - 4.68 }$

How many significant figures are in 3.408 × 10⁴ m?