Chem Test 3
Draw the dot formula for the HNO 2 molecule. The nitrogen atom is the central atom and the hydrogen atom is attached to an oxygen atom. On the basis of the number of regions of high electron density about the nitrogen atom, what is the approximate bond angle about the N atom?
120
the simplified balanced equation shows how many H+ ions?
14
What are the bond angles in BeI 2 molecules?
180
what if the coefficient of NO3
3
what is the total number of electrons involved in this reaction
6
The phosphorus pentachloride molecule is nonpolar and contains no lone (unshared) electron pairs on the phosphorus atom. What are all of the possible Cl-P- Cl bond angles?
90°, 120°, and 180°
Which of the following species does not have octahedral electronic geometry?
AsF5
Which of the following molecules has 120° bond angles?
BCl3
Which of the following is a false statement about BF 3
BF 3 has trigonal pyramidal electronic geometry.
Which of the following molecules has 120° bond angles?
BI3
According to Brongled law a base is defined as proton donor
False
Compound NOT soluble strong base
Fe(OH)2
Choose the species that is incorrectly matched with the electronic geometry about the central atom.
GeCl 4 trigonal bipyramidal
Which one of the following pairs of molecules and molecular geometries is incorrectly matched?
H 2 O angular
Which molecule is incorrectly matched with the molecular geometry?
H 2 S linear
which of the following species could not react as a brongled low rate
H+
Brengled law acid?
H2O
Which of the following molecules has the smallest bond angle(s)?
H2O
which of the following statement is true
H2O is the conjugate acid of OH-
in which of the following pairs is the order of the acid strength correct?
H2SO4>H2SO3
Which one of the following pairs of molecules and molecular geometries is incorrectly matched?
HBr linear
Strong acids (No weak acids)
HCLO4, HClO3, HI, Hal, HNO3, HBr, H2SO4
Which species is incorrectly matched with bond angles?
HI 90°
Which response contains all the characteristics listed that should apply to silicon tetrafluoride, SiF 4 , and no other characteristics?
I
Which of the following species has square pyramidal molecular geometry?
IF5
Which one of the following molecules is polar?
NCL3
Which molecule is incorrectly matched with the molecular geometry?
NO 2 - tetrahedral
Which one of the following molecules is polar?
PCl3
Which one of the following is a nonpolar molecule with polar bonds?
PF5
Consider a molecule with 109.5 o bond angles and sp 3 hybridization at the central atom. Which of the following molecules does not fit this description?
SF4
Which response contains all of the following molecules that can be described as bent or angular molecules and none that have other shapes?
SO 2 , H 2 S
Which molecule is incorrectly matched with the molecular geometry?
SO 2 linear
Choose the species that is incorrectly matched with the electronic geometry about the central atom.
SO 3 2- pyramidal
Which one of the following molecules is octahedral?
SeF6
Which of the following statements about PI 3 is false?
The bond angles are slightly larger than 109.5 o .
Which of the following statements about chloroform, CHCl 3 , is false?
The hybridization of Cl is sp 3 .
Which statement concerning the ion, SO 4 2- ,is true?
The hybridization of the S atom is sp 3 .
Which of the following statements about SCl 4 is false?
The molecular geometry is trigonal bipyramidal.
A Lewis base provides 2 electrons in the formation of a covalent bond
True
Which of the following molecules has three lone pairs of electrons on the central atom?
XeF2
Which of the following species has trigonal bipyramidal electronic geometry and trigonal bipyramidal molecular geometry?
XeF2
Which of the following species has square planar molecular geometry?
XeF4
a conjugate acid base pair differ by
a proton
The molecular geometry of the hydrogen sulfide molecule is
angular
What is the molecular geometry of the species, ICl 2 +
angular
Which of the following statements about AsF 5 is false?
as has one lone pair
what is the molarity of the solution if 15.66 ml of this solution requires 43.87 of 0.2283M KOH for titration to the equivalence point
e=0.6387
HF is a stronger acid than HCL?
false
How many unshared electrons are there in the highest energy level of phosphorus in the covalent compound PF 5 ? (HINT: draw Lewis dot formula.)
none
the simplified balanced equation shows how many H2O molecules
none
Which one of the following is a polar molecule with nonpolar bonds?
none of these
Predict the molecular geometry of the iodine tetrachloride ion, ICl 4 -
octahedral (square planar)
The molecular geometry of PCl 3 is ____.
pyramidal
according to Lewis theory base
releasing a pair of electrons
What is the hybridization of the oxygen atom in H 3 O + ?
sp3
What is the hybridization of the central I atom in I 3 - ?
sp3d
The electronic geometry of the central atom in PCl 3 is ____.
tetrahedral
For AsF 3 , the electronic geometry is ____ and the molecular geometry is ____.
tetrahedral, trigonal planar
What is the electronic geometry (and molecular geometry) of phosphorus pentachloride, PCl 5 .
trigonal bipyramidal
