Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CHEM104 > Exam Flash Cards > Flashcards

Exam Flash Cards

1
Q

From a Thermochemical standpoint, the formation of a chemical bond is:

A

Exothermic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

The lattice energy of an ionic compound can be calculated using the:

A

Born-Haber Cycle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Atoms of different electronegativity form [ ] [ ] bonds

A

Polar Covalent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Defined as “the ability to attract electrons to itself in a chemical bond”

A

Electronegativity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Different, but formally correct Lewis structures of a molecule are called:

A

Resonance Structures

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The acronym for the method of predicting molecular structure based on their Lewis structures is:

A

VSEPR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

A central atom surrounded by 5 electron pairs always puts a lone pair in what position?

A

Equatorial

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The mixing of orbitals in the Valence Bond Theory is called:

A

Hybridization

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

The full name of the SI unit for pressure, which is equal to 1 N/m2, is:

A

Pascal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

22.4 L of a gas at standard temperature (273.15K) and pressure (atm) is called the:

A

Molar Volume

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

The pressure of a gas coexisting in equilibrium with a liquid is its:

A

Vapor Pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Urms is a measure of the [ ] [ ] of the particles of gas.

A

average velocity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The weakest of the intermolecular forces are:

A

Dispersion Forces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The type of intermolecular force giving water its unusually high boiling point is:

A

Hydrogen Bonding

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The phase change directly from a solid to a gas is called:

A

Sublimation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Solid, liquid, and gas coexist in equilibrium at the:

A

Triple Point

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

The body centered cubic unit cell contains how many atoms?

A

two

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Which forces are recognized as intermolecular forces?

A
  1. Dispersion Forces
  2. Dipole-dipole Forces
  3. Ion-dipole Forces
  4. Hydrogen Bonding
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is the coordination number of any atom in a body-centered cubic lattice?

A

8

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

LCAO is the acronym for a technique used in:

A

Valence Bond Theory

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What is the formula of Ozone?

A

O3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

The thermodynamic quantity that drives mixing of gases and solutions is the:

A

Entropy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

A measure of solution concentration defined as nsolute/(nsolute + nsolvent) is called the:

A

Mole Fraction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Vapor pressure lowering and boiling point elevation are examples of:

A

Colligative Properties

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

The equation Psoln = Xsolvent • Posolvent is known as:

A

Raoult’s Law

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

The rate law d[A] / dt = k[A]2 belongs to a reaction [ ] [ ] in [A].

A

Second Order

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

The time required for a reactant to decrease to half of its original concentration is called a:

A

Half Life

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

The temperature dependence of reaction rates is governed by what equation?

A

Arrhenius Equation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

A substance that facilitates a chemical reaction without being used up in the process is called a:

A

Catalyst

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

The notion that at equilibrium the rate of the forward reaction equals that of the reverse reaction is called:

A

Dynamic Equilibrium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

The equation giving the concentrations of an equilibrium is the:

A

The Law of Mass Action

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

The tendency of equilibria to counteract imposed changes is:

A

Le Chatelier’s Principle

33
Q

In the context of the Bronsted-Lowry definition, a base is a:

A

Proton Acceptor

34
Q

The reaction 2H2O ⇔ H3O+ + OH- is called the [ ] of water.

A

Autoionization

35
Q

The negative decadic logarithm of the hydroxide concentration is the:

A

pOH

36
Q

The defining criterion of a ‘strong acid’ is that it is:

A

Completely Dissociated

37
Q

Determining the concentration of a base with the aid of a buret is a lab technique called:

A

Titration

38
Q

The numerical value of the ion product of water is:

A

1.0 x 10-14

39
Q

A Lewis base is defined as an:

A

Electron Pair Donor

40
Q

As T increases, the solubility of gases in liquids:

A

Goes through a minimum at Tcrit

41
Q

Molality is a measure of concentration (of x) defined as:

A

nx / msolvent

42
Q

The osmotic pressure π is given by:

A

π = MRT

43
Q

A change in [ ] changes the rate constant of a reaction.

A

Temperature

44
Q

What plot for a first-order reaction (A→B) gives a straight line?

A

ln[A] vs. t

45
Q

The correct form of the Arrhenius equation is:

A

k = Ae(-Ea / kT)

46
Q

A rule of thumb that close to room temperature an increase in T by 10oC:

A

Increases rate by a factor of 2-3

47
Q

The half-life of a first-order reaction is:

A

t1/2 = 0.693 / k

48
Q

The relationship between Kc and Kp is:

A

Kp = Kc(RT)Δn

49
Q

An equimolar mixture of a weak base and its conjugate acid is a:

A

Buffer

50
Q

The pH of a buffer is given by what equation?

A

Henderson-Hsselbalch

51
Q

During the titration of a base of unknown concentration, an equal amounts of acid has been added at the:

A

Equivalence Point

52
Q

The equilibrium constant governing solubility of salts is the:

A

Solubility Product

53
Q

A process involving the ‘gain of electrons’ is a:

A

Reduction

54
Q

A voltaic Cell consists of two [ ] [ ] connected by a wire and a salt bridge.

A

Half Cells

55
Q

The electrode where the oxidation occurs is called the:

A

Anode

56
Q

All standard reduction potentials are quoted in Volt versus the potential of the:

A

Standard Hydrogen Electrode

57
Q

What constant gives the charge of a mole of electrons?

A

Faraday Constant

58
Q

Cell potentials in non-standard state concentrations and pressures can be calculated with the:

A

Nernst Equation

59
Q

The splitting of water by an electrical current is called the

[ ] of water.

A

Electrolysis

60
Q

The electrochemical oxidation of water to O2 encounters a significant:

A

Overvoltage

61
Q

Most elements are composed of several:

A

Isotopes

62
Q

The inherent instability of heavy nuclei is the cause of:

A

Radioactivity

63
Q

α-decay

A

Decay of a nuclide accompanied by ejection of a 42He particle.

64
Q

The kinetics of radioactive decay are:

A

First Order

65
Q

Nuclear Power Plants harvest the energy of nuclear [ ].

A

Fission

66
Q

According to Einstein, the energy released in nuclear reactions is associated with a:

A

Mass Defect

67
Q

At the equivalence point of a titration of a weak base with a strong acid, the solution is:

A

Mildly Acidic

68
Q

The pH of a buffer made with equal amounts (# moles) of acetic acid and acetate is:

A

4.74

69
Q

At a pH below 7.00, the indicator phenolphthalein is:

A

Colorless

70
Q

The correct relationship between ΔGo and Eo is:

A

ΔGo = -nFEo

71
Q

A common fuel cell extracts energy from what reaction:

A

2H2 + O2 → 2H2O

72
Q

What is the heat of fission of 1 mole of 235U?

A

1.66 x 1010 kJ/mol

73
Q

A process involving the ‘loss of electrons’ is an:

A

Oxidation

74
Q

β-Decay

A

Decay of a nuclide accompanied by ejection of a 0-1e particle.

75
Q

The MO Theory predicts that O2 has 2 unpaired electrons and thus is:

A

Paramagnetic

76
Q

What is true for conjugate acid/base pairs?

A

pKa + pKb = 14

77
Q

What is the halflife of 220Rn?

A

55.6 sec

78
Q

What is the halflife of 235U?

A

703 million years

CHEM104 (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions