Question 1

After carrying out the operation (13.7 + 0.027) ÷ 8.221,how many significant figures are appropriate to show in the result?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5F) B) and C)
G) A) and E)

Question 2

Walking fast can consume 5.0 kcal per minute.How many hours of exercise are required to consume 450 kcal,the energy in a large candy bar?

Accepted Answer

A)  7.5 hr
B)  1.25 hr
C)  1.75 hr
D)  1.5 hr
E)  1 hrF) A) and E)
G) A) and D)

Question 3

A scoop of vanilla ice cream is a pure substance.

Accepted Answer

A) True 
 B)False

Question 4

If the density of corn syrup is 1.380 g/mL and a sample of corn syrup has a mass of 32 grams,what is the volume of corn syrup,in liters?

Accepted Answer

A)  43 L
B)  23 L
C)  0.043 L
D)  0.023 L
E)  2.3 LF) C) and D)
G) B) and D)

Question 5

Which of the following speeds is the greatest? (1 mi = 1609 m)

Accepted Answer

A)  40 mi/h
B)  2.0 × 105 mm/min
C)  40 km/h
D)  0.74 km/min
E)  400 m/minF) D) and E)
G) B) and E)

Question 6

77 K is colder than 4 K.

Accepted Answer

A) True 
 B)False

Question 7

If a patient in the hospital is running a temperature of 39.5°C,what is this in degrees Fahrenheit?

Accepted Answer

A)  99°F
B)  101.3°F
C)  102.4°F
D)  103.1°F
E)  104°FF) D) and E)
G) A) and E)

Question 8

The ripening of fruit,once picked,is an example of physical change.

Accepted Answer

A) True 
 B)False

Question 9

There are 58 counties in California and about 660,000 people in each county.How many million people live in California?

Accepted Answer

A)  383 million people
B)  38 million people
C)  40 million people
D)  58 million people
E)  11 million peopleF) D) and E)
G) B) and E)

Question 10

If two numbers are multiplied together,one which has 3 significant figures and the other which has 4 significant figures,explain how to round the answer.

Accepted Answer

The answer will have 3 signifi...

Question 11

How many significant figures are in 0.006570?

Accepted Answer

A)  3
B)  4
C)  5
D)  6
E)  7F) C) and E)
G) C) and D)

Question 12

___________ is the term used to indicate a measuring device is accurate.(Hint: Often used when measuring the volume of a liquid.)

Accepted Answer

Graduated ...

Question 13

The number 6.0448,rounded to 3 decimal places,becomes 6.045.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following represents the greatest mass?

Accepted Answer

A)  2.0 x 103 mg
B)  10.0 dg
C)  0.0010 kg
D)  1.0 x 106 μg
E)  3.0 x 1012 pgF) B) and C)
G) B) and E)

Question 15

The juice from an orange is a mixture.

Accepted Answer

A) True 
 B)False

Question 16

Which one of these represents a physical change?

Accepted Answer

A)  Water,when heated,forms steam.
B)  Bleach turns hair yellow.
C)  Sugar,when heated,becomes brown.
D)  Milk turns sour.
E)  Apples,when exposed to air,turn brown.F) B) and C)
G) B) and E)

Question 17

The result of (3.8621 × 1.5630) - 5.98 is properly written as

Accepted Answer

A)  0.06.
B)  0.056.
C)  0.0565.
D)  0.05646.
E)  0.056462.F) A) and E)
G) C) and D)

Question 18

An empty flask's mass is 17.4916 g,and its mass is 43.9616 g when filled with water at 20.0°C (density = 0.9982 g/mL) .The density of "heavy water" at 20.0°C is 1.1053 g/mL.What is the mass of the flask when filled with heavy water at 20.0°C?

Accepted Answer

A)  29.2573 g
B)  46.8016 g
C)  46.7489 g
D)  29.3100 g
E)  43.9140 gF) All of the above
G) A) and B)

Question 19

Select the answer with the correct number of decimal places for the following sum: 13.914 cm + 243.1 cm + 12.00460 cm =

Accepted Answer

A)  269.01860 cm
B)  269.0186 cm
C)  269.019 cm
D)  269.02 cm
E)  269.0 cmF) A) and D)
G) A) and C)

Question 20

A smart phone has dimensions of 4.9 inches (height) ,2.3 inches (width) and 8.0 millimeters (depth) .What is the volume of the smart phone in cubic centimeters? (1 in = 2.54 cm)

Accepted Answer

A)  58 cm3
B)  1.7 x 105 cm3
C)  90 cm3
D)  3.4 cm3
E)  34 cm3F) A) and B)
G) A) and C)

Exam 1: Chemistry: the Central Science

77 K is colder than 4 K.

Correct AnswerverifiedShow Answer

___________ is the term used to indicate a measuring device is accurate.(Hint: Often used when measuring the volume of a liquid.)

Correct AnswerverifiedGraduated ...View AnswerShow Answer

Which of the following represents the greatest mass?

Correct AnswerverifiedShow Answer

An empty flask's mass is 17.4916 g,and its mass is 43.9616 g when filled with water at 20.0°C (density = 0.9982 g/mL) .The density of "heavy water" at 20.0°C is 1.1053 g/mL.What is the mass of the flask when filled with heavy water at 20.0°C?

Correct AnswerverifiedShow Answer

Which one of these represents a physical change?

Correct AnswerverifiedShow Answer

The juice from an orange is a mixture.

Correct AnswerverifiedShow Answer

A scoop of vanilla ice cream is a pure substance.

Correct AnswerverifiedShow Answer

The ripening of fruit,once picked,is an example of physical change.

Correct AnswerverifiedShow Answer

There are 58 counties in California and about 660,000 people in each county.How many million people live in California?

Correct AnswerverifiedShow Answer

After carrying out the operation (13.7 + 0.027) ÷ 8.221,how many significant figures are appropriate to show in the result?

Correct AnswerverifiedShow Answer

If the density of corn syrup is 1.380 g/mL and a sample of corn syrup has a mass of 32 grams,what is the volume of corn syrup,in liters?

Correct AnswerverifiedShow Answer

How many significant figures are in 0.006570?

Correct AnswerverifiedShow Answer

The result of (3.8621 × 1.5630) - 5.98 is properly written as

Correct AnswerverifiedShow Answer

The number 6.0448,rounded to 3 decimal places,becomes 6.045.

Correct AnswerverifiedShow Answer

A smart phone has dimensions of 4.9 inches (height) ,2.3 inches (width) and 8.0 millimeters (depth) .What is the volume of the smart phone in cubic centimeters? (1 in = 2.54 cm)

Correct AnswerverifiedShow Answer

Walking fast can consume 5.0 kcal per minute.How many hours of exercise are required to consume 450 kcal,the energy in a large candy bar?

Correct AnswerverifiedShow Answer

Select the answer with the correct number of decimal places for the following sum: 13.914 cm + 243.1 cm + 12.00460 cm =

Correct AnswerverifiedShow Answer

Which of the following speeds is the greatest? (1 mi = 1609 m)

Correct AnswerverifiedShow Answer

If two numbers are multiplied together,one which has 3 significant figures and the other which has 4 significant figures,explain how to round the answer.

Correct AnswerverifiedThe answer will have 3 signifi...View AnswerShow Answer

If a patient in the hospital is running a temperature of 39.5°C,what is this in degrees Fahrenheit?

Correct AnswerverifiedShow Answer

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The answer will have 3 signifi...
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