Stoichiometry
Empirical/Molecular Formulas
Molecular Geometry
Lewis Structures and Hybridization
Intermolecular Forces
100
Iron and Carbon Dioxide react to form Iron (III) Oxide and carbon monoxide. What is the sum of the coefficients in the balanced equation?
9
100
Determine the empirical formula for mustard gas, a chemical warfare agent, which has the following composition by mass: 30.2% carbon, 5.07% hydrogen, 44.58% chlorine, and 20.16% sulfur.
C4H8Cl2S
100
A compound with 2 bonding pairs and one lone pair has what molecular geometry?
Bent
100
How many bonded electrons are there in the lewis structure for PO43-?
10
100
What intermolecular forces are present in NCl3?
London Dispersion Forces and Dipole-Dipole
200
Aluminum reacts with water to produce Aluminum Oxide and Hydrogen Gas. What is the sum of the coefficients of the balanced chemical equation?
8
200
The empirical formula of a compound if CH2O. Its molar mass is 120.10 g/mol. What is the molecular formula of the compound?
C4H8O4
200
What is the molecular geometry of PO33-
Trigonal Pyramidal
200
How many lone pairs are there in the lewis structure for XeF5
16
200
What intermolecular forces are present in XeCl2?
London Dispersion Forces
300
Sodium Phosphate reacts with Calcium Chloride to produce Calcium Phosphate and Sodium Chloride. What is the sum of the coefficients of the balanced chemical equation?
12
300
Find the molecular formula for a compound containing C, H, and O that is 54.5% carbon and 36.3% oxygen by mass. The compound has a molar mass of 176 g/mol.
C8H16O4
300
SI4 has what molecular geometry?
Seesaw
300
In the acetylene ion:
H-C≡C:-
What is the hybridization of the carbon on the left? On the right?
sp and sp
300
Arrange the following by increasing boiling point: CH3CH3, CH3CH2Cl, CH3CH2OH, and CH4
CH4 < CH3CH3 < CH3CH2Cl < CH3CH2OH
400
In the reaction, where magnesium oxide reacts with water to produce magnesium hydroxide. What mass of magnesium oxide is needed to produce 264g of magnesium hydroxide?
182g MgO
400
Burning 11.2 mL of a gas known to contain only carbon and hydrogen, we obtained 44.0 mg CO2 and 0.0270 g H2O. Find the empirical formula of the gas.
CH3
400
What is the molecular geometry of IF5
Square Pyramidal
400
How many pi bonds are in this molecule? How many sigma bonds?
4 pi bonds, 16 sigma bonds
400
Arrange the following by decreasing vapor pressure: CH3Cl, CH4, CH3CH2OH
CH4 > CH3Cl > CH3CH2OH
500
Barium chloride reacts with Sodium Phosphate to produce Barium Phosphate and Sodium Chloride. What mass of barium chloride is needed to react completely with 46.8g of sodium phosphate?
89.2 g BaCl2
500
A tartaric acid sample containing C, H, and O and weighing 12.01 grams produced 14.08 grams of CO2 and 4.32 grams of H2O under combustion analysis. What is the empirical formula?
C2H3O3
500
What is the molecular geometry of XeOF2?
T-shaped
500
a. sp3 e. sp
b. sp3 f. sp
c. sp2
d. sp3
500
Which of the following is NOT true?
a) Sulfur tetrafluoride, SF4, is a polar molecule with seesaw molecular geometry.
b) Bromine pentafluoride, BrF5, is a nonpolar molecule with trigonal bipyramidal molecular geometry.
c) CH2Cl2 is a polar molecule with tetrahedral geometry.
d) Boron trifluoride, BF3, is a nonpolar molecule with trigonal planar geometry.
e) Dimethyl ether, CH3OCH3, is a polar molecule.
b) Bromine pentafluoride, BrF5, is a nonpolar molecule with trigonal bipyramidal molecular geometry.