Chemical Equations
Stoichiometry!
Atomic Theory
Bonding
Gas Laws
100
Balance this equation:
CH4 + Cl2 --> CCl4 + HCl
CH4 + 4 Cl2 --> CCl4 + 4 HCl
100
If I combust 1 mole of propane (C3H8), how many moles of water are produced?
4 moles of water are produced
100
What is the general shape of an atom?
A tightly packed, positively charged nucleus with electrons orbiting around it.
100
What is the lewis structure for Boron?
Answer drawn.
100
True or False: Gases have no defined shape(they expand to fit their container), are easy to compress and occupy more space than solids or liquids.
True
200
In the last problem, which were reactants and which were products?
Reactants: CH4 and Cl2
Products: CCl4 and HCl
200
If I have 1.5 moles of C3H8 and 10 moles of oxygen gas, which reactant will run out first (and what is it called when a reactant runs out first)?
The propane will run out first, which means it is the limiting reactant!
200
What is the electron configuration for Na?
1s22s22p63s1
200
What is the lewis structure for HCl?
Answer drawn.
200
How many moles of gas are present in a container with the following conditions:
Pressure = 197 atm, Volume = 20.0 L, Temperature = 28.0 oC
(197 atm)(20.0 L) = (n)(0.0821 L atm / mol K)(301 K)
n = 159 mol
300
Will the following reaction create a precipitate?
AgNO3 (aq) + HCl (aq) --> AgCl (s) + HNO3 (aq)
Yes, AgCl is a precipitate
300
How many moles of CO2 are produced when I combust 25 grams of C3H8?
25 g / 44.1 g/mol = 0.567 mol x 3 = 1.70 moles of CO2 produced
300
How do we abbreviate/shorten Nitrogen's electron configuration?
N: 1s22s22p3
N: [He]2s22p3
Noble gas cores allows us to shorten electron configurations!
300
What is the electron geometry of PI3?
Triagonal Pyramidal
300
If I have a balloon with a volume of 3 L at 298 K and under a constant 1 atm of pressure, at what temperature would the volume expand to 4 L?
(3 L)(1 atm) / (298 K) = (4 L)(1 atm) / (T)
T =397.3333 K
400
For the previous problem, write the net ionic equation.
Ag+ (aq) + Cl- (aq) --> AgCl (s)
400
What is the theoretical yield of CO2 for the last reaction (with 25 grams of C3H8)?
1.70 mol CO2 x 44.1 g/mol = 75 grams of CO2 (Theoretical Yield)
400
Draw the orbital diagram of fluorine.
400
Is NCl3 polar or non polar?
Polar
400
What is the pressure of the air in a room with 2 atm of Nitrogen, 3 atm of Oxygen, 1 atm of Hydrogen, and 5 atm of Argon?
The room's air would be 11 atm.
500
Write the net ionic equation for this equation:
Ba(NO3)2 (aq) + NiSO4 (aq) --> Ni(NO3)2 (aq) + BaSO4 (s)
Ba 2+ (aq) + SO4 2- (aq) --> BaSO4 (s)
500
In the last problem, what would be the percent yield if I only created 56 grams of CO2 in the reaction?
(56 g) / (75 g) x 100% = 74.7%
500
What is the difference between the Bohr and Quantum models?
Bohr = electrons behave as particles
Quantum = electron has both particle and wave behavior
500
What is the molecular geometry of XeF4?
Square Planar
500
If I have a gas that has a molar volume of 22.414, and it fills an 80 L container, how many moles of gas do I have?
(80 L) / (22.414 L/mol) = 3.569 mol