Chemistry
Draw the best Lewis structure for CBr3+. What is the formal charge on the C?
+1
What is the oxidation number of the chromium atom in CaCrO4 ?
+6
Give the numbers for ml for an f orbital.
-3, -2, -1, 0, +1, +2, +3
For n = 3, what are the possible values for l?
0, 1, 2
What is the density of chlorine gas at STP?
3.16 g/L
How many orbitals are contained in the third principal level (n = 3) of a given atom?
9
Which of the following is an example of physical change?
Dew forms on a blade of grass.
Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of K2S and Fe(NO3)2 are mixed.
Fe2+(aq) + S2-(aq) → FeS(s)
Give the ground state electron configuration for Pb
[Xe]6s^2 4f^14 5d^10 6p^2
Which of the following is NOT true about formal charge?
all charges should be zero
Identify the discovery that Thomson made.
an electron
Which of the following quantum numbers describes the shape of an orbital?
angular momentum quantum number
Write the name for Ba3(PO4)2.
barium phosphate
Identify the products of a combustion reaction of an alcohol.
carbon dioxide and water
Determine the name for N2O5.
dinitrogen pentoxide
Which of the following signs on q and w represent a system that is doing work on the surroundings, as well as gaining heat from the surroundings?
q = +, w = -
Which of the following signs on q and w represent the surroundings that is doing work on the system, as well as losing heat to the surroundings?
q = -, w = +
Identify the color of a flame test for lithium.
red
What are the possible orbitals for n = 4?
s, p, d, f
Identify the weakest bond
single covalent bond
An example of kinetic energy is
skiing down a mountain
Choose the pure substance from the list below.
sugar
Which of the following does NOT describe a metal?
tends to gain electrons
Give the name for P4O10
tetraphosphorus decoxide
The systematic pattern for filling up the electron configuration, from low energy to high energy, for an element is called the
the Aufbau principle.
The statement, "In a chemical reaction, matter is neither created nor destroyed" is called
the Law of Conservation of Mass.
Identify the discovery that Millikan made
the charge of a single electron
Which of the following processes is exothermic?
the condensation of water
Define specific heat capacity.
the quantity of heat required to change a system's temperature by 1°C
A covalent bond is best described as
the sharing of electrons between atoms.
An ionic bond is best described as
the transfer of electrons from one atom to another.
Which of the following processes is endothermic?
the vaporization of ethanol
Give the name for SnO.
tin(II) oxide
How do you determine the central atom in a Lewis structure?
typically the least electronegative element
Identify the color of a flame test for potassium.
violet
Choose the homogeneous mixture from the list below.
wine
Give the temperature and pressure at STP.
0°C and 1.00 atm
List the number of sigma bonds and pi bonds in a triple bond.
1 sigma, 2 pi
Give the number of core electrons for chlorine.
10
The bond angle in NBr3 is
107°
What value of l is represented by a d orbital?
2
Choose the statement below that is FALSE.
A strong acid solution consists of only partially ionized acid molecules.
The volume of a gas is inversely proportional to the pressure of a gas is known as
Boyle's Law
The chemical formula for calcium nitride is
Ca3N2.
Which one of the following compounds contains ionic bonds?
CaO
Give the formula for potassium dichromate
K2Cr2O7
Which of the following compounds is an Arrhenius base?
LiOH
Which of the following will cause the volume of an ideal gas to triple in value?
Lowering the pressure by a factor of 3 while the temperature stays constant.
The mixing of which pair of reactants will result in a precipitation reaction?
Mg(NO3)2(aq) + K2CO3(aq)
Identify the element that has a ground state electron configuration of [Kr]5s24d3
Nb
Which of the following statements is TRUE?
Nonmetals are located on the right side of the periodic table.
Which of the following statements about subatomic particles is FALSE?
Protons have about the same mass as electrons.
Use Lewis theory to determine the chemical formula for the compound formed between Rb and O.
Rb2O
Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of lithium sulfide and copper(II) nitrate are mixed.
S 2- (aq) + Cu2+(aq) → CuS(s)
Which statement is TRUE according to the kinetic molecular theory?
The average kinetic energy of a particle is proportional to the temperature in Kelvin.
Which statement is TRUE about kinetic molecular theory?
The collisions of particles with one another is completely elastic.
Choose the ground state electron configuration for Ti2+ .
[Ar]3d2
Choose the ground state electron configuration for Cr3⁺
[Ar]3d3
Give the ground state electron configuration for As
[Ar]4s^2 3d^10 4p^3
Which of the following is a molecular element?
fluorine
Define pressure.
force exerted per unit area by gas particles as they strike the surfaces around them
Write the name for FeS.
iron(II) sulfide
Identify the correct values for a 2p orbital
n = 2, l = 1, ml = 0
Which of the following quantum numbers describes the size and energy of an orbital?
principal quantum number
Identify the description of an atom.
protons and neutrons in nucleus; electrons in orbitals
