Chem Test 3

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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


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