Question : 51.              Consider the following reaction. CrCl3(s) + KCl(s) + 2H2SO4(l)  ?  : 1335443

51.              Consider the following reaction.

CrCl3(s) + KCl(s) + 2H2SO4(l)  ?  KCr(SO4)2(s) + 4HCl(g)

green        white      colorless            purple              colorless

solid          solid         liquid              solid                 gas

When the green solid is mixed with the white solid and the colorless liquid is added, the mixture starts to bubble and fume.  When all action has stopped, a wet purple solid containing solid white specks remains.  Which substance is the limiting reactant?

A)  CrCl3    B)  KCl    C)  H2SO4    D)  KCr(SO4)2    E)  HCl

52.              Consider the following reaction.

Cr2O3(s) +  3CCl4(l) ? 2CrCl3(s) + 3COCl2(g)

green        colorless         purple          colorless

solid         liquid              solid             gas

When the green solid is mixed with the colorless liquid, the mixture starts to bubble and fume.  When all action has stopped, a dry purple solid containing solid green specks remains.  Which substance is the limiting reactant?

A)  Cr2O3    B)  CCl4    C)  CrCl3    D)  COCl2    E)  there is no limiting reactant

53.              Consider the following reaction.

Cr2O3(s) +  3CCl4(l) ? 2CrCl3(s) + 3COCl2(g)

green        colorless         purple          colorless

solid         liquid              solid             gas

When the green solid is mixed with the colorless liquid, the mixture starts to bubble and fume.  When all action has stopped, a wet purple solid remains.  Which substance is the limiting reactant?

A)  Cr2O3    B)  CCl4    C)  CrCl3    D)  COCl2    E)  there is no limiting reactant

54.              Phosphorus trichloride can be made by the reaction:

P4(s) + 6Cl2(g) ? 4PCl3(l)

What is the maximum amount of phosphorus trichloride that can be formed if 10 molecules of P4 react with 36 molecules of chlorine?

A)4 moleculesD)24 molecules

B)6 moleculesE)46 molecules

C)12 molecules

55.              Phosphorus trichloride can be made by the reaction:

P4(s) + 6Cl2(g) ? 4PCl3(l)

What is the maximum amount of phosphorus trichloride that can be formed if 15 molecules of P4 react with 42 molecules of chlorine?

A)4 moleculesD)28 molecules

B)12 moleculesE)57 molecules

C)24 molecules

56.              Ammonia is usually made by the reaction:

N2(g) + 3H2(g) ? 2NH3(g)

What is the maximum amount of ammonia that can be formed if 25 molecules of nitrogen react with 60 molecules of hydrogen?

A)20 moleculesD)40 molecules

B)25 moleculesE)85 molecules

C)30 molecules

57.              Ammonia is usually made by the reaction:

N2(g) + 3H2(g) ? 2NH3(g)

What is the maximum amount of ammonia that can be formed if 30 molecules of nitrogen react with 100 molecules of hydrogen?

A)20 moleculesD)60 molecules

B)30 moleculesE)70 molecules

C)40 molecules

58.              The figure shows a molecular-level diagram of reactant molecules

List the number and formulas of the molecules that will be present after the reaction takes place.

A)2H2O + 6H2 + 2O2D)6H2O + 2H2 + O2

B)3H2O + 5H2 + O2E)6H2O + 2H2

C)4H2O + 4H2 + O2

59.              The figure shows a molecular-level diagram of reactant molecules

2C2H2(g) + 5O2(g) ? 4CO2(g) + 2H2O(g)

List the number and formulas of the molecules that will be present after the reaction takes place.

A)4CO2 + 2H2OD)6CO2 + 3H2O + 3O2

B)4CO2 + 2H2O + 2C2H2E)8CO2 + 4H2O + 2C2H2

C)4CO2 + 2H2O + 2C2H2 + 5O2

60.              Consider the reaction, N2(g) + O2(g) ? 2NO(g)

The molecular image represents a mixture of N2(g) and O2(g) just before reaction occurs.

What is the limiting reactant and how much of the excess reactant remains after the reaction is complete?   The image contains 2 N2 molecules and 4 O2 molecules.

A)N2(g), 1 O2(g)D)O2(g), 1 N2(g)

B)N2(g), 2 O2(g)E)N2(g), 0 O2(g)

C)N2(g), 3 O2(g)