Question : 31.Which of the following ionic compounds would have a name : 1309585

 

 

31.Which of the following ionic compounds would have a name that contains the Roman numeral III?

a.AlCl3

b.FeBr3

c.Cu3N

d.more than one correct response

e.no correct response

 

 

 

32.In which of the following compounds is there a one-to-two ratio between positive and negative ions?

a.calcium sulfide

b.magnesium bromide

c.lead(IV) oxide

d.more than one correct response

e.no correct response

 

 

 

33.In which of the following pairs of polyatomic ions do both members of the pair have the same charge?

a.sulfate and phosphate

b.carbonate and hydroxide

c.ammonium and nitrate

d.more than one correct response

e.no correct response

 

 

 

34.Which of the following pairings of compound name and compound formula is incorrect?

a.sodium acetate – NaC2H3O2

b.barium sulfate – BaSO4

c.magnesium nitrate – MgNO3

d.more than one correct response

e.no correct response

 

 

 

35.Which of the following compounds contain more than 10 atoms per formula unit?

a.ammonium phosphate

b.aluminum carbonate

c.iron(III) cyanide

d.more than one correct response

e.no correct response

 

 

 

36.Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:

(1) Representative elements in the same group of the periodic table have the same number of valence electrons.

(2) Discrete molecules do not exist in ionic compounds.

(3) A sulfate ion has one less oxygen than a sulfite ion.

a.All three statements are true.

b.Two of the three statements are true.

c.Only one of the statements is true.

d.None of the statements is true.

 

 

 

37.Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:

(1) All ionic compounds that contain metal ions have names that contain Roman numerals.

(2) Ionic compounds tend to have high melting points and tend to be good conductors of electricity when in the molten state.

(3) Three ions are present in one formula unit of a compound that contains Na+ and O2- ions.

a.All three statements are true.

b.Two of the three statements are true.

c.Only one of the statements is true.

d.None of the statements is true.

 

 

 

38.Characterize EACH of the three given statements as being TRUE or FALSE andthen indicate the collective true-false status of the statements using the choices:

(1) If an atom loses one or more electrons, it becomes negatively charged because  protons now outnumber electrons.

(2) Nitrogen, a group VA element, possesses five valence electrons.

(3) Polyatomic ions are generally not very stable and usually lose their identity during chemical reactions.

a.All three statements are true.

b.Two of the three statements are true.

c.Only one of the statements is true.

d.None of the statements is true.

 

 

39.Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:

(1) An atom with the electron configuration 1s22s22p2 possesses two valence electrons.

(2) The formula of the ionic compounds that contains Ba2+ and N3- ions is Ba2N3.

(3) The polyatomic ions nitrate and azide are both tetraatomic entities.

a.All three statements are true.

b.Two of the three statements are true.

c.Only one of the statements is true.

d.None of the statements is true.

 

 

 

40.Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:

(1) Ionic bonds result from the sharing of one or more pairs of electrons.

(2) The compound copper(II) phosphate contains eight oxygen atoms per formula unit.

(3) Ionic compounds that contain fixed charge metals cannot contain polyatomic ions.

a.All three statements are true.

b.Two of the three statements are true.

c.Only one of the statements is true.

d.None of the statements is true.