An airbag is inflated by the nitrogen produced in the reactiondescribed in the balanced equation below:
2NaN3(s) 2Na(s) + 3N2(g)
When 0.18 mol NaN3(g) wasdecomposed to produce solid sodium and nitrogen gas, 5.55 g ofnitrogen inflated the airbag. What is the percent yield ofnitrogen?
Select one:
a.
73.4%
b.
14.9%
c.
67%
d.
7.57%
e.
The percentage yield can’t be calculated as the yield obtainedis greater than the theoretical yield
Q27,
Which one of the following statements DOESNOT result from VSEPR Theory?
Select one:
a.
Electrons and bonds around an atom will be in the lowest energyarrangement
b.
Methane, CH4, has a tetrahedral geometry
c.
All bonds around any carbon atom must be of the same length
d.
The positive or negative charge of an ion must be considered inVSEPR theory
e.
Boron compounds are planar (flat) as B only has three electronsto bond and no lone pairs of electrons
Q29.
Which of the following statements about intermolecular forcesis FALSE?
Select one:
a.
Intermolecular forces between gas molecules are generally weakerthan those between molecules in the liquid phase.
b.
Dispersion forces can occur between any molecules at anytime
c.
All molecules experience some intermolecular forces
d.
During boiling, the thermal movement of molecules breaksintermolecular interactions – the stronger the intermolecularforces the higher the boiling point
e.
Molecules can have either dipole-dipole interactions ordispersion forces but not both
Q30.
Which of the following statementsis FALSE for nitrogen?
Select one:
a.
When nitrogen forms 4 single bonds it has a positive charge.
b.
Nitrogen has five valence electrons 2s2 and2p3
c.
The shape around nitrogen is always trigonal planar.
d.
Nitrogen often forms compounds containing three bonds and anon-bonding pair of electrons.
e.
Nitrogen forms a triple bond between the nitrogen atoms innitrogen gas (N2)
- Q22 An Airbag Is Inflated By The Nitrogen Produced In The Reaction Described In The Balanced Equation Below 2nan3 S 1 (71.16 KiB) Viewed 57 times