Molecular Geometry
Draw the lewis structure for Triiodide and identify the hybridization and geometry.
Hybridization : sp3d
Geometry : Linear
What are all the intermolecular forces and what type of molecules do they apply to?
LDF - All molecules
Dipole-induced - Polar + Nonpolar
Ion-Induced - Ion + Nonpolar
Dipole-Dipole - Polar + Polar
Ion-Dipole - Ion + Polar
Hydrogen bonding - H-FON + H-FON
What is the molarity of a solution made when 78 grams of calcium chloride are diluted to a total volume of 3200 mL.
0.22M
What is the national animal of Scotland?
Unicorn
Draw the lewis structure for Bromine pentafluoride and identify the hybridizations, geometries, and bond angles.
Hybridization: sp3d2
Geometry: Square Pyramidal
Bond angles: 180, 90
Draw the lewis structure for Acetonitrile (CH3CN) and identify all the possible intermolecular forces present.
IMFs: LDF, Dipole-Dipole
What is the molality of a solution prepared by dissolving 35.0 g of naphthalene (C10H8) in 600 mL of benzene? (C6H6). Density of benzene is 0.876g/mL
0.520m
What is the longest word you can type using only the top row of a keyboard?
Typewriter
Predict the molecular geometry and electrostatic maps representations of hydrogen cyanide (HCN).
Geometry: Linear
The vapor pressure of a volatile liquid at 15.0°C is 55 mmHg. Find its vapor pressure at 55.0°C. (DeltaHvap = 38kJ/mol, R=8.314J/molK)
380mmHg
Determine the approximate freezing point of an aqueous solution prepared by dissolving 18.5 g of magnesium chloride in 175 g of water. Kf=1.86C/m
-6.20C
What is the most stolen food in the world?
Cheese
Predict the molecular geometry, hybridization, and electrostatic map regions for Oxygen Difluoride. Explain how its map differs from water.
Geometry: Bent
Hybridization:Sp3
It differs from H2O since fluorine is more electronegative, compared to H2O where the oxygen is more electronegative.
A volatile liquid has a vapor pressure of 1.0 atm at 25.0°C. When heated to 125.0°C, its vapor pressure rises to 12.0 atm. What is the enthalpy of vaporization of this substance in kJ/mol? (R = 8.314J/molK)
24.5kJ/mol
The Henry's law constant for elemental oxygen in water at 25°C is 1.3x10-6M/mmHg. What is the equilibrium concentration of elemental oxygen in water when the partial pressure of oxygen is 610mmHg
7.9x10-4M
How many teeth does a snail have?
20,000
Draw the lewis structure for Selenium Tetrafluoride Dichloride. Identify the geometry, bond angles, dipole arrows, and identify which molecule is more electropositive/electronegative.
Geometry: Octahedral
Bond angles: 180, 90
Electropositive: Selenium
Electronegative: Fluorine
A substance has a triple point at 0.50 atm and 20°C, and a critical point at 75 atm and 350°C. Its normal freezing point is 25°C, and its normal boiling point is 80°C.
1.Sketch the phase diagram, labeling each point and phases
2. Identify the phase changes occurring at each prompt based off your diagram:
A - Sublimation
B - Deposition
C - Melting --> Vaporization
D - Condensation --> Freezing
45.0 g of aluminum chloride are dissolved in 650.0 mL of water at 45.0°C. What is the new freezing point (in °C), boiling point (in °C), and osmotic pressure (in atm) of this aqueous solution? Assume the density of water is 1.00 g/mL, and take into consideration the ideal van 't Hoff factor.
Kf = 1.86C/m; Kb = 0.512C/m; R = 0.0821atm/molK
Freezing point - -3.86C
Boiling point - 101.06C
Osmotic Pressure - 46.2atm
What did the ancient Romans use as mouthwash?
Urine