See picture in slide 7.
Bond angle labeled a and b?
a: slightly smaller than 109.5 degree. b: 120 degree.
100
Convert Ideal Gas law equation to an equation containing density and molar mass.
PM = dRT
100
What intermolecular forces dosn't exist between water and O2.
a)Hydrogen bonding
b)dipole dipole force
c)dipole induced dipole force
d)dispersion force
b
200
When and where is the exam?
Friday (May 15th) 10:05am
200
How many pi bonds are there in this molecule?
4
200
See slide 6
TiPbO3
200
A sample of CO2 gas has a pressure of 56.5 mm Hg in a 125. mL flask. The sample is transferred to a new flask where it has a pressure of 62.3 mm Hg at the same temperature. What is the volume of the new flask?
113 mL
200
1. Hydrogen bonding is present in all of the following molecules exept:
a)H2SO4
b)NH3
c)PH3
d)HF
e)H2O2
--------------------------------------------2. The intermolecular forces of attraction CCl4 is described by which of the following: (a) dipole-dipole forces (b)ion-dipole forces (c) dispersion (or London) forces (d)gravitational forces (e) ion-dipole forces
both are c
300
What orbitals overlap in forming bond at label d?
sp2 from N and sp2 from C: sigma bond
2p from N and 2p from C: pi bond
300
See slide 2.
2.17 L
300
See Slide 1
3 and 4
400
See slide 4
See slide 5
400
Calculate the root mean square speed of Helium atom at 1000 K. (R = 8.314 J/(K mol))
1.94 *10^15 m/s
500
Silver(107.86 g/mol) has a face centered cubic unit cell structure with a cell edge of 409 pm. Calculate the density (g/cm3) of silver.
10.5 g/cm^3
500
A 0.0125 g sample of a gas with an empirical formula of CHF2 is placed in a 165 mL flask. It has a pressure of 0.018 atm at 22.5ºC. What is the molecular formula of the
compound? (R = 0.08206 atm L/K mol)
C2H2F4
500
Which of the following comparison is incorrect: (a) intermolecular force: Xe>Ne (b) boiling point: NH3>PH3 (c) Vapor pressure: H2O is lower than H2S
(d) Vapor pressure: I2 is lower than Br2
(e) Intermolecular force between: H2O and Xe