Quiz 4 - Flashcards


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1

Which of the following would exhibit hydrogen bonding in a pure substance?

A) HCl

B) CH₃CH₃

C) CF₂H₂

D) CH₃CH₂OH

E) CH₃OCH₃

D) CH₃CH₂OH

2

Which of the following represents the intermolecular forces present in CO₂?

A) dispersion only

B) dipole-dipole only

C) hydrogen bonding only

D) dispersion and dipole-dipole

E) dispersion and hydrogen bonding

A) dispersion only

3

What intermolecular forces are present between two molecules of CH₃CF₃?

A) dispersion only

B) dispersion and dipole-dipole

C) dispersion, dipole-dipole, and hydrogen bonding

D) dispersion and hydrogen bonding+

B) dispersion and dipole-dipole

4

What intermolecular forces are present between two molecules of CH₃OCH₂CH₃?

A) dispersion only

B) dipole-dipole only

C) dispersion and dipole-dipole

D) dispersion and hydrogen bonding

E) dipole-dipole and hydrogen bonding

C) dispersion and dipole-dipole

5

Ammonia and hydrogen fluoride both have unusually high boiling points due to _____

A) dispersion forces.

B) dipole-dipole interactions.

C) hydrogen bonding.

D) ion-dipole interactions.

E) low molar masses.

C) hydrogen bonding.

6

Which of the following would you expect to have the highest boiling point?

A) H₂

B) NH₃

C) N₂

D) CH₄

B) NH₃

7

Convert 287 kPa to atm

2.83 atm.

8

How many atm is 23.4 psi?

1.59 atm

9

How many mmHg are in 89.6 kPa?

672 mmHg

10

How many torr are in 42.6 psi?

2.20 × 10³ torr

11

Which one of the following is NOT a statement of the Kinetic Molecular Theory?

A) Gas particles will be attracted to one another.

B) The volume available to the gas particles is equal to the volume of the container.

C) The measured pressure is from collisions of the gas particles with the walls of the container.

D) The average kinetic energy is proportional to the temperature of the system.+

A) Gas particles will be attracted to one another.

12

How do you convert a Celsius temperature to Kelvin?

A) Multiply by 9/5 and then add 32

B) Subtract 273.15

C) Subtract by 32, then multiply by 5/9

D) Add 273.15

E) Celsius is always the same as Kelvin

D) Add 273.15

13

Which of the following temperatures is the coldest?

A) 100 K

B) 100 °C

C) 100 °F

A) 100 K

14

How do you convert a Fahrenheit temperature to Celsius?

A) Multiply by 9/5 and then add 32

B) Subtract 273.15

C) Subtract by 32, then multiply by 5/9

D) Add 273.15

E) Celsius is always the same as Kelvin

C) Subtract by 32, then multiply by 5/9

15

A thermometer reads 52.3 °C. What is the temperature in Fahrenheit?

126.14 °F

16

A thermometer reads 18.3 °C. What is the temperature in Kelvin?

291.5 K

17

A thermometer reads -111.1 °F. What is the temperature in °C?

-79.5 °C

18

A thermometer reads -111.1 °F. What is the temperature in Kelvin?

193.7 K

19

A sample of argon has a volume of 1.20 L at STP. If the temperature is increased to 22.0°C and the pressure is lowered to 0.800 atm, what will the new volume be, in L?

1.62 L

20

A weather balloon calibrated at 0.00 °C to have a volume of 20.0 L has what volume in L at -40.0 °C assuming pressure is held constant?

17.1 L

21

The gas in a 250.0 mL piston experiences a change in pressure from 1.00 atm to 2.80 atm. What is the new volume (in mL) assuming the moles of gas and temperature are held constant?

89.3 mL

22

A 1.20 L weather balloon on the ground has a temperature of 25.0°C and is at atmospheric pressure (1.00 atm). When it rises to an elevation where the pressure is 0.720 atm, then the new volume is 1.80 L. What is the temperature (in °C) of the air at this elevation?

49 °C

23

At STP, 5.00 mol of gas occupies approximately what volume in liters?

112 L

24

How many moles of chlorine gas at 110 °C and 28.0 atm would occupy a vessel of 15.0 L?

A) 0.0749 mol

B) 13.4 mol

C) 46.5 mol

D) 0.132 mol+

B) 13.4 mol

25

What temperature (in °C) did an ideal gas shift to if it was initially at -10.00 °C at 4.620 atm and 35.00 L and the pressure was changed to 8.710 atm and the volume changed to 15.00 L?-71

-60.6 °C

26

A sample of 2.00 mol of gas in a 10.00 L container is at 45.0 °C. What is the pressure (in atm) of the gas?

5.22 atm

27

Write the formula of the conjugate base of the Brønsted-Lowry acid, CH₃CH₂COOH

CH₃CH₂COO⁻

28

Write the formula of the conjugate base of the Brønsted-Lowry acid, HF

F⁻

29

Write the formula of the conjugate base of the Brønsted-Lowry acid, NH₄⁺

NH₃

30

Consider the reaction below. Which species is(are) the Brønsted-Lowry base(s)? HCO₃⁻ (aq) + F⁻ (aq) ⇌ CO₃²⁻ (aq) + HF (aq)

A) F⁻, HF

B) HCO₃⁻, F⁻

C) CO₃²⁻, HF

D) CO₃²⁻, F⁻+

D) CO₃²⁻, F⁻

31

Which of the following is a conjugate acid/base pair?

A) H₃PO₄, PO₄³⁻

B) H₂PO₄⁻, PO₄³⁻

C) HPO₄²⁻, PO₄³⁻

D) H₃PO₄, HPO₄²⁻

C) HPO₄²⁻, PO₄³⁻

32

Write the basic equilibrium equation for NH₃

NH₃(aq) + H₂O(l) ⇌ OH⁻(aq) + NH₄⁺(aq)

33

Write the acidic equilibrium equation for C₃H₇COOH.

HA(aq) + H₂O(l) ⇌ A⁻(aq) + H₃O⁺(aq)

34

The equation below is best described as ___________.

²³⁵₉₂U → ²³⁵₉₃Np + ⁰₋₁e

A) alpha decay.

B) beta decay.

C) gamma emission.

D) positron emission.+

B) beta decay.

35

Which of the following symbols represents a beta particle?

A) ⁰₊₁e

B) ⁰₋₁e

C) ⁴₂He

D) γ+

B) ⁰₋₁e

36

Which of the following symbols represents an alpha particle?

A) ⁰₊₁e

B) ⁰₋₁e

C) ⁴₂He

D) γ

C) ⁴₂He

37

What is the product of alpha emission from uranium-238?

A) ²³⁴U

B) ²³²Th

C) ²³⁴Th

D) ²³⁷Np

E) ²³¹Pa+

C) ²³⁴Th

38

Complete the following nuclear decay process: ²³⁵₉₂U → ⁴₂He + ___

A) ²³⁹₉₄Pu

B) ²³¹₉₄Pu

C) ²³¹₉₂U

D) ²³¹₉₀Th

E) ²³⁹₉₀Th

D) ²³¹₉₀Th

39

The Cs-131 nuclide has a half-life of 30 years. After 120 years, 3.0 g remain. What is the original mass of the Cs-131 sample in grams?

48 g

40

10 g of a radioactive substance was placed in an airtight container 50 years ago. When the container is opened, only 2.5 g remains. What is the half-life of this material?

A) 5 years

B) 25 years

C) 50 years

D) 80 years

E) 100 years

B) 25 years

41

One of the radioactive isotopes used in chemical and medical research is sulfur-35, which has a half-life of 87 days. How many days would it take for 0.25 g to remain of a 1.00 g sample of sulfur-35?

174 days

42

What species is formed by gamma ray emission of fermium-250?

A) ²⁵⁰Es

B) ²³⁰Th

C) ²⁵⁰Fm

D) ²⁵¹Fm

E) ²⁵¹Md

C) ²⁵⁰Fm

43

What species is produced when californium-253 undergoes alpha particle emission?

A) ²⁵²Bk

B) ²⁴⁹Cm

C) ²⁵³Es

D) ²⁵¹Cm

E) ²⁵²Es

B) ²⁴⁹Cm

44

Complete the following nuclear bombardment equation by filling in the nuclear symbol for the missing species.

²³⁵₉₂U + ¹₀n → ? + ¹³⁹₅₄Xe + 3 ¹₀n

A) ⁹⁴₄₈Cd

B) ⁹⁶₃₈Cm

C) ⁹⁴₃₈Pu

D) ⁹⁴₃₈Sr

E) ⁹⁶₃₈Sr

D) ⁹⁴₃₈Sr

45

²³⁵U undergoes fission by one neutron to produce ¹³³Sb, three neutrons, and what other nuclide?

A) ¹⁰⁰Zr

B) ¹⁰⁰Nb

C) ¹⁰¹Nb

D) ¹⁰⁰Mo

E) ¹⁰²Mo

B) ¹⁰⁰Nb

46

Assuming only one product forms, what nuclide is produced from the fusion reaction between ³H and ⁴He?

A) ⁷He

B) ⁷N

C) ⁷Li

D) ³N

E) ³Li

C) ⁷Li

47

Bombarding nuclei with neutrons is characteristic of

A) fission reactions only.

B) fusion reactions only.

C) both fission reactions and fusion reactions.

D) neither fission reactions nor fusion reactions.

A) fission reactions only.