Exam 1
What is equal to 1/12 the mass of a carbon-12 atom
What is Atomic Mass Unit
The number of atoms in 12 grams of Carbon-12.
What is a mole.
Form in which energy is transferred?
What is heat
Species with an odd number of electrons placed on the least electronegative atom.
What are free radicals.
Give possible sets of (n, l, ml, ms) for electrons in 4p2.
What is:
n = 4, l = 1, ml = 1, ms = 1/2
n = 4, l = 1, ml = 0, ms = 1/2
When two elements combine to form more than one compound, the mass of one element that combines with a fixed mass of the other are in a ratio of small, whole numbers
What is Law of Multiple Proportions
Name the 7 diatomic molecules and the two odd molecules.
What is H, N, O, F, Cl, Br, I, and P4, and S8
What is the complete ground state electron configuration of an atom of Copper, one with a gas core, one without?
1s22s22p63s23p64s13d10
[Ar]4s13d10
What are the three types of intermolecular forces and which is the strongest?
What are: dipole, induced dipole, and hydrogen bonds, hydrogen bongs are strongest.
Use the given equation to come up with the net ionic equation. 2LiOH(aq) + (NH4)2SO4(aq) -> Li2SO4(aq) + 2 NH4OH
What is OH-(aq) + NH4+(aq) -> NH3(aq) + H2O (L)
Name and give formulas for the 5 oxoacids
What is: Carbonic - H2CO3, Nitric - HNO3, Phosphoric - H3PO4, Sulfuric - H2SO4, Chloric - HClO3
Determine the percentage composition by mass of dichlorine heptoxide.
What is 38.76% Chlorine, 61.24% Oxygen.
How many photons are emitted from a laser source if the pulse has an energy of 5.2kJ and wavelength of 6.00 x 102nm?
What is 1.6 x 1022 photons.
Determine the mass of solid that must be used in preparing 2.50 mL of 0.085M silver nitrate solution.
What is 3.6 g AgNO3
Energy. Find q, w, delta E and delta H for 50.0 g CCl4.
What is 9.72kJ = q = delta H, w = -0.946kJ, delta E = 8.77kJ.
What mass in grams of fluoride ion is in 3.0 gallons of drinking water with 3.0 ppm by mass fluoride ion?
What is 3.4 x 10-2 g fluoride ion.
If 1 mole of dimes were distributed equally among the earth's population, which is currently estimated at 7 billion, and if 10-cent dime coins were made silver, what would be the number of houses would you need to store your dimes. The density of silver is 10.5 g/cm3, and a single dime coin has a mass of 2.3 grams. An average U.S. house has a floor area of 2200 ft2 and floor-to-ceiling height of 8 feet.
4 x 104 houses per person
Explain the reason for the general trend of increasing ionization energy across a period.
What is ionization energy increases across a period because the number of protons increases. When protons are higher, they have more pull on the electrons in the valence shell. This makes it harder to take the electrons and thus needs more energy to do so.
Determine deltarH from bond enthalpy date for the gas phase reaction of methane (CH4) and steam to form CO2 and Hydrogen.
What is 154 kJ.
Consider the bond between the carbon atoms in the C2H4 molecule. How does it occur, is it sigma, pi, both or neither. EXPLAIN.
What is both. One of the bonds is a sigma forming when the sp2 hybrid orbitals form each carbon overlap. The pi bond is the other bond in the double bond. It is pi because it is the bond that bonds the two unhybridized p orbitals directly across from each other.
The mass of 60.4% of the atoms of an element is 68.9257 u. There is only one other natural isotope of that element, and its atomic mass is 70.9249 u. Calculate the average atomic mass of the element.
What is 69.7 u.
Calculate the mass of Lead(II) iodide that will precipitate if 42.5 grams of Lead(II) nitrate and 15.6 grams of sodium iodide are dissolved in the same container of water. Also, identify the reactant that is in excess and determine the mass that will remain unreacted.
What is Lead II nitrate is in excess and 25.3g of it will remain unreacted, 24.0g Lead II iodide precipitates.
Determine the quantity of heat transferred in kilojoules when 100.0 grams of steam at 103.5 degrees Celcius is cooled to ice at 0.0 degrees Celcius.
What is -302 kJ.
What is the electron-pair and molecular geometry and the bond angles for Bromine Pentafluoride?
What is octahedral, square pyramidal, and 90 degrees.
A lab technician combines 25.0mL of 0.269 M Nickel II chloride with 30.0mL of 0.260 M Potassium hydroxide. How many grams of nickel hydroxide can precipitate?
What is 0.362 g nickel hydroxide will precipitate.