Lichter CHM1045 Quizzes (2A-2C) (Spring 2012)

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Chapter 2 Quiz

Review of attempt 1

Finish review Started on Wednesday, 25 January 2012, 12:26 PM

Completed on Wednesday, 25 January 2012, 12:43 PM

Time taken 17 mins 2 secs

Marks 7/11

Grade 6 out of a maximum of 10 (64%)

Question1 Marks: 1

A hypothetical element is composed of three isotopes with the following masses andabundances: 48.01X (23.5%; 48.01 amu),34.97X (45.500%; 34.97 amu), 42.28X (31.000%;42.28 amu). Calculate the average atomic mass of this element? Even though it isincorrect to do so, enter your answer to 3 decimal places in order to humor thecomputer.

Answer:125.260

Convert percentage to decimal for each isotope.Multiply respective decimal by themassAdd all these numbers together.Although this is an "average" you do NOTdivide by the number of components IncorrectMarks for this submission: 0/1.

Question2 Marks: 1

How many neutrons are contained in the nucleus of a 75Se atom.

Choose one answer.

a. 75

b. 34



c. 41

d. 109

e. 5

IncorrectMarks for this submission: 0/1.

Question3 Marks: 1

Which of the following represent isotopes?

Choose one answer.

a. A

andB

b. AandC

c. AandD

d. CandD


Question4 Marks: 1

Match the following symbols to the correct element names.

Se selenium

P phosphorus

K potassium

S sulphur

Na sodium

Correct



Marks for this submission: 1/1.

Question5 Marks: 1

Which of the following answers correctly list the subatomic particles contained in 109Ag+

Choose one answer.

a. 109protons,47neutrons,and 108electrons

b. 47protons,109neutrons,and 46

electrons

c. 47protons,62neutrons,and 47electrons

d. 47protons,62neutrons,and 46electrons

e. 47protons,62neutrons,and 48electrons


Question6 Marks: 1

What is the column number on the Periodic Table in the front of your textbook for thealkali metals

Choose one answer.

a. Column1A

b. Column2A



c. Column7A

d. Column8A

e. Column5B

CorrectMarks for this submission: 1/1.

Question7 Marks: 1

What is the column number on the Periodic Table in the front of your textbook for thehalogens

Choose one answer.

a. Column

1A

b. Column2A

c. Column7A

d. Column8A

e. Column5B


Question8 Marks: 1

What is the chemical symbol for tin?

Choose one answer.

a. Sb

b. Sn

c. Ta

d. Ti


Question9 Marks: 1



What is the chemical symbol for platinum?

Choose one answer.

a. P

b. Pa

c. Pt

d. Pu


Question10 Marks: 1

A fishing boat accidentally spills 9.0 barrels of diesel oil into the ocean. Each barrelcontains 42 gallons. If the oil film on the ocean is 2.5 x 10 2 nm thick, how many squaremeters will the oil slick cover? Assume that the oil slick forms a cube rather than acylinder.

Choose one answer.

a. 5.7 x10-3 m2

b. 5.7 x106 m2

c. 5.7 x107 m2

d. noneof these


Question11 Marks: 1

Because of the high heat and low humidity in the summer in Death Valley, California, avisitor requires about one quart of water for every two miles traveled on foot. Calculate

the approximate number of liters required for a person to walk 20. kilometers in DeathValley.

Choose one answer.

a. 5.9L



b. 23L

c. 61L

d. 93L


Finish review

Chapter 2 Quiz

Review of attempt 2

Finish review

Started on Friday, 27 January 2012, 12:03 PM

Completed on Friday, 27 January 2012, 12:17 PM

Time taken 13 mins 41 secs

Marks 9/11


Question1 Marks: 1

A hypothetical element is composed of three isotopes with the following masses andabundances: 114.91X (50.0%; 114.91 amu),124.55X (45.500%; 124.55 amu), 117.96X(4.5000%; 117.96 amu). Calculate the average atomic mass of this element. Eventhough it is incorrect to do so, enter your answer to 3 decimal places in order to humorthe computer.

Answer:167.207



Convert percentage to decimal for each isotope.Multiply respective decimal by themassAdd all these numbers together.Although this is an "average" you do NOTdivide by the number of components IncorrectMarks for this submission: 0/1.

Question2 Marks: 1

How many neutrons are contained in the nucleus of a 238U atom.

Choose one answer.

a. 92

b. 235

c. 143

d. 146

e. 327


Question3 Marks: 1

Which are isotopes? An atom that has an atomic number of 34 and a mass number of

76 is an isotope of an atom that hasChoose one answer.

a. anatomicnumber of 32 anda massnumber of 76.

b. anatomicnumber

of 34 anda massnumber of 80.

c. 42neutronsand 34protons.



d. 42protonsand 34neutrons.


Question4 Marks: 1

Match the following elements to the correct symbols.

titanium Ti

sodium Na

tin Sn

nitrogen N

nickel Ni


Question5 Marks: 1

Which of the following answers correctly list the subatomic particles contained in109

Ag+

Choose one answer.


b. 47protons,109

neutrons,and 46electrons







Question6 Marks: 1

Which of the following answers correctly list the subatomic particles contained in 37Cl-

Choose one answer.


b. 17protons,37neutrons,and 16electrons



e. 17

protons,20neutrons,and 18electrons


Question7



Marks: 1

What is the column number on the Periodic Table in the front of your textbook for thehalogens

Choose one answer.

a. Column1A

b. Column2A

c. Column7A

d. Column8A

e. Column5B


Question8 Marks: 1

What is the chemical symbol for tin?

Choose one answer.

a. Sb

b. Sn

c. Ta

d. Ti


Question9 Marks: 1

If 1.4% of the mass of a human body is calcium, how many kilograms of calcium are

there in a 173-pound man?

Choose one answer.

a. 1.1kg Ca

b. 5.3kg Ca



c. 1.1x102 kgCa

d. 5.3x102 kg


Question10 Marks: 1


Choose one answer.

a. 5.7 x10-3 m2

b. 5.7 x10

6m

2

c. 5.7 x107 m2

d. noneof these

Correct


Question11 Marks: 1

Because of the high heat and low humidity in the summer in Death Valley, California, avisitor requires about one quart of water for every two miles traveled on foot. Calculatethe approximate number of liters required for a person to walk 20. kilometers in DeathValley.

Choose one answer.

a. 5.9L

b. 23L

c. 61L

d. 93L




Finish review

Chapter 2 Quiz

Review of attempt 3

Finish review

Started on Sunday, 22 April 2012, 02:56 PM

Completed on Monday, 23 April 2012, 12:15 PM

Time taken 21 hours 19 mins

Marks 9/11


Question1

Marks: 1

A hypothetical element is composed of three isotopes with the following masses andabundances: 117.23X (50.0%; 117.23 amu),111.31X (45.500%; 111.31 amu), 135.93X(4.5000%; 135.93 amu). Calculate the average atomic mass of this element. Eventhough it is incorrect to do so, enter your answer to 3 decimal places in order to humorthe computer.

Answer:115.378

Convert percentage to decimal for each isotope.Multiply respective decimal by the

massAdd all these numbers together.Although this is an "average" you do NOTdivide by the number of components CorrectMarks for this submission: 1/1.

Question2 Marks: 1

How many neutrons are contained in the nucleus of a 75Se atom.



Choose one answer.

a. 75

b. 34

c. 41

d. 109

e. 5


Question3 Marks: 1

Which are isotopes? An atom that has an atomic number of 34 and a mass number of76 is an isotope of an atom that has

Choose one answer.

a. anatomicnumber of 32 anda massnumber of 76.

b. an

atomicnumber of 34 anda massnumber of 80.

c. 42neutronsand 34protons.

d. 42protonsand 34neutrons.


Question4 Marks: 1

Match the following symbols to the correct element names.



Pb lead

Au gold

Hgmercury

Si silicon

S sulphur


Question5 Marks: 1

Which of the following answers correctly list the subatomic particles contained in 109Ag+

Choose one answer.


b. 47protons,

109neutrons,and 46electrons


d. 47protons,62neutrons,

and 46electrons





Question6 Marks: 1

Which of the following answers correctly list the subatomic particles contained in 37Cl-

Choose one answer.


b. 17protons,37neutrons,and 16electrons



e. 17protons,20

neutrons,and 18electrons


Question7 Marks: 1

What is the column number on the Periodic Table in the front of your textbook for thenoble gases

Choose one answer.

a. Column1A

b. Column2A

c. Column7A



d. Column8A

e. Column5B

Correct


Question8 Marks: 1

Which of the following has the smallest mass?

Choose one answer.

a. 3.50 x1023 moleculesof I2

b. 85.0 g of Cl2

c. 2.50 mol of F2

d. 0.050 kg of Br 2


Question9 Marks: 1

Which element has the chemical symbol, Au?

Choose one answer.

a. aluminum

b. argon

c. gold

d. silver

Correct


Question10 Marks: 1




Choose one answer.

a. 5.7 x10-3 m2

b. 5.7 x10

6m

2

c. 5.7 x107 m2

d. noneof these


Question11 Marks: 1

Because of the high heat and low humidity in the summer in Death Valley, California, avisitor requires about one quart of water for every two miles traveled on foot. Calculatethe approximate number of liters required for a person to walk 20. kilometers in DeathValley.

Choose one answer.

a. 5.9L

b. 23L

c. 61

L

d. 93L


Finish review

Lichter CHM1045 Quizzes (2A-2C) (Spring 2012)

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