Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/75

Click to flip

75 Cards in this Set

  • Front
  • Back
  • 3rd side (hint)
Which of the following does NOT involve a physical change?

A) grinding
B) mixing
C) melting
D) tarnishing
D)tarnishing
Which of the following is NOT a physical property of water?

A) It is composed of hydrogen and oxygen.

B) Sugar dissolves in it.

C) It has a boiling point of 100¶C.

D) It is a colorless liquid.
A) It is composed of hydrogen and oxygen.
Which state of matter takes both the shape and volume of its container?

A) solid
B) liquid
C) gas
D) both B. and C.
C) gas
Which state of matter is characterized by having a definite shape and a definite volume?

A) gas
B) solid
C) plasma
D) liquid
B) solid
All of the following are physical properties of a substance in the liquid state EXCEPT

A) indefinite shape
B) virtual incompressibility
C) definite mass
D) indefinite volume
D) indefinite volume
Which electron configuration of the 4f energy sublevel is the most stable?

A) 4f6
B) 4f
C) 4f13
D) 4f14
E) 4f7
D) 4f14
If there is an increase in the intensity of incident light with energy above the threshold for the photoelectric effect,

A) the ejected electrons move faster

B) the ejected electrons move more slowly

C) more electrons are ejected

D) fewer electrons are ejected
C) more electrons are ejected
In the Bohr model of the atom, an electron in an orbit has a fixed

A) color
B) energy
C) position
B) energy
The formula 2n2 represents

A) the number of sublevels in any energy level

B) the maximum number of electrons that can occupy an energy level

C) the number of orbitals in a sublevel

D) none of the above
B) the maximum number of electrons that can occupy an energy level
The principal quantum number indicates what property of an electron?

A) position
B) electron cloud shape
C) energy level
D) spin
E) speed
C) energy level
According to the Aufbau principle

A) electrons enter orbitals of lowest energy first

B) electrons enter orbitals of highest energy first

C) an orbital may be occupied by only two electrons

D) electrons in the same orbital must have opposite spins
A) electrons enter orbitals of lowest energy first
As the temperature of the gas in a balloon decreases

A) the volume increases

B) the pressure increases

C) the average kinetic energy of the gas decreases

D) all of the above
C) the average kinetic energy of the gas decreases
Chemical reactions

A) create and destroy atoms
B) produce new substances
C) only occur outside living organisms
D) occur only in living organisms
B) produce new substances
In every balanced chemical equation, each side of the equation has the same number of

A) moles
B) coefficients
C) atoms
D) molecules
E) subscripts
C) atoms
When your body breaks down sugar completely, it releases _____ if you burned the same amount of sugar in a flame.

A) the same amount of heat as
B) more heat than
C) less heat than
A) the same amount of heat as
In every chemical reaction,

A) mass and atoms are conserved
B) mass and molecules are conserved
C) mass and liters are conserved
D) moles and molecules are conserved
E) moles and liters are conserved
A) mass and atoms are conserved
How are the numerator and denominator in a conversion factor related?

A) One is greater than or less than the other.
B) Both equal the value 1.
C) They each have the same units.
D) They are equal.
D) They are equal
Which of the following is a pure compound?

A) neon
B) fresh air
C) salt water
D) calcium iodide
E) aluminum
D) Calcium Iodide
What is diffusion?
the tendency of molecules and ions to move toward areas of lower concentration until the concentration is uniform throughout the system
What happens to the partial pressure of oxygen in the air if the air temperature is increased?
The partial pressure will increase
Which of the following atoms have the greatest velocity if each atom had the same kinetic energy?

A) BR
B) NH3
C) Cl
D) H
E) Ar
D) H
which one is lightest?
A box with a volume of 22.4L contains 1.0 mol of N and 2.0 mol of H at 0 degrees Celsius.
The partial pressure of N2 is 101 kPa
Under________, the behavoir of real gases is most like that of ideal gases.
High temperature and low pressure
What is the basis for exceptions to the aufbau diagram?
Filled and half-filled energy sublevels are more stable than partially-filled energy
When an electron moves from a lower to higher energy level, the electron...
absorbs a quantum of energy
Which of the following electromagnetic waves have the highest frequencies?

A) gamma rays
B) ultraviolet rays
C) x-rays
D) microwaves
A) gamma rays
According tothe Heisenberg uncertainty principle, if the position of a moving particle is known, what other quantity CANNOT be known?
Velocity
If density of an unknown gas Z is 4.50g/L at STP. Find the molar mass of gas Z.
101 g/mol
Why is a gas easier to compress than liquid or a solid?
The volume of a gas's particles is small compared to the overall volume of the gas
What happens to the temperature of a gas when it's compressed?
The temperature increases
If a balloon is heated, what happens to the pressure of the air inside of the balloon if the volume remains constant?
The pressure increases
If oxygen is removed from a sample of air as iron rusts, what happens to the partial pressure of oxygen in the air?
It decreases
When the volume and the number of particles of a gas is constant, the ________ is also constant.
ratio of the pressure and temperature in Kelvins
Boyle's law states that the volume of a gas varies directly with pressure. True or False?
False.

The volume of a gas varies INDIRECTLY with pressure
When the temperature and number of particles are kept constant for a sample of gas, ____________ is also constant.
the product of the pressure and volume
Charles's Law states that volume of a gas is directly proportional to its temperature. True or False?
True
Generally for a gas at constant volume, the pressure of a gas is directly proportional to its temperature in Kelvins. True or False?
True
When heat is added to boiling water, its temperature

A) increases
B) stays the same
C) decreases
B) stays the same
(Triangle)H stands for...
the heat of reaction for a chemical reaction
The volume of a gas is reduced from 4L to 0.5L, while the temperature is held constant. The gas pressure change is what?

A) increases by a factor of 4
B) decreases by a factor of 4
C) decreases by a factor of 0.5
D) increases by a factor of 8
D) increases by a factor of 8
Who developed the quantum mechanical model of the atom?
Erwin Schrodinger
To which variable of an object is the object's wavelength directly proportional?

A) position
B) mass
C) temperature
D) velocity
E) none
E) none
In Bohr's model of the atom, how are the subatomic particles placed?
The elctrons orbit the protons, which are at the center of the atom
If the spin of one electron in an orbital is clockwise, what is the spin of the other electron in that orbital?

A) clockwise
B) counterclockwise
C) zero
B) counterclockwise
... the position ofa particle can be determined.
By analyzing its interaction with another particle
1 mole of any gas at STP occupies ____ of volume.
22.4L
If heat involved in a chemical reaction has a negative sign, heat is ...

A) lost to the surroundings
B) gained from the surroundings
C) the same
A) lost to the surroundings
In an exothermic reaction, the energy stored in the chemical bonds of the reactants is...
greater than the energy stored in the bonds of the products
A calorie is ____ than a joule

A) lower
B) greater
A) greater
The heat capacity of an object depends in part on its _____
mass
The heat of formation for an element in its standard state is
always zero
The (triangle) H soln is

A) always positive
B) always negative
C) sometimes positive and sometimes negative
C) sometimes positive and sometimes negative
2 objects are sitting next to each other in direct sunlight. Object A gets hotter than Object B. Which one has a lower specific heat?
Object A
rate1/rate2 = square root of molar mass2/molar mass1

What law is this?
Graham's Law of Effusion
Px/Ptotal = molx/mol(total) = Vx/Vtotal

OR

Ptotal = P1 + P2 + P3 + ...

What Law is this?
Dalton's Law of Partial Pressure
P1V1/T1 = P2V2/T2

What law is this?
Combined Gas Laws
PV = nRT

What law is this?

What is the R?
Ideal Gas Law

R= 0.08206 L * atm/mol * K
P1V1 = P2V2

What law is this?
Boyle's Law
V1/V2 = T1/T2

What law is this?
Charles's Law
Who discovered that energy came in bundles and that it is quantized?
Max Planck
Speed of Light
2.997 * 10^8 m/s
Who discovered electrons using cathode ray tubes?
J.J Thompson
Who measured the charge of an electron?
Robert Millikan
Who discovered protons?
J.J Thompson
Who discovered the nucleus of an atom and that an atom is mostly empty space?
Ernst Rutherford
What is entrapy?
(s) It is a measure of disorder in a system
On what principle does calorimetry depend?

A) Law of Conservation of Energy
B) Law of Multiple Proportions
C) Hess's Law
D) Law of Enthalpy
A) Law of Conservation of Energy
How far can a molecule travel in air before it collides with another molecule?

A) about a meter
B) much less than a meter
C) much more than a meter
B) much less than a meter
Select the correct statement.

A) Molar mass refers to ternary ionic compounds only.

B) Gram atomic mass refers to all elements.

C) Gram molecular mass refers to all ionic compounds.

D) Gram Avogadro mass refers to binary compounds only.

E) Gram formula mass refers to all elements and compounds.
E) Gram formula mass refers to all elements and compounds.
In any chemical compound, the elements are always combined in the same proportion by

A) mass
B) volume
C) charge
D) density
E) number of protons
A) mass
Dimensional analysis involves which of the following processes?

A) multiplying a known measurement by a conversion factor
B) splitting a problem into steps
C) solving a formula
D) estimating the magnitude of the answer
A) multiplying a known measurement by a conversion factor
Which of the following is a true statement about compounds?

A) They can be physically separated into their constituent elements.
B) They have properties similar to those of their constituent elements.
C) They are pure substances.
D) They have variable compositions.
C) They are pure substances.
One difference between a mixture and a compound is that

A) a mixture can only be separated into its components by chemical means.
B) a compound can only be separated into its components by chemical means.
C) a mixture must be uniform in composition.
D) a compound is made up of more than one phase.
B) a compound can only be separated into its components by chemical means.
How does the speed of light change as light moves from a distant star toward earth in the vacuum of space?

A) The speed decreases.
B) The speed remains constant.
C) The speed increases.
B) The speed remains constant.
The quantum mechanical model of the atom

A) defines the exact path of an electron around the nucleus
B) has many analogies in the visible world
C) is concerned with the probability of finding an electron in a certain position
D) was proposed by Niels Bohr
C) is concerned with the probability of finding an electron in a certain position