Question : 11.              When the mixture of molecules shown in the molecular-level : 1335439

 

 

11.              When the mixture of molecules shown in the molecular-level image undergoes complete reaction, all of these molecules are converted to products.  Which of the following reactions could this represent?

A)N2 + O2 ? 2NOD)N2 + 3H2 ? 2NH3

B)N2 + 2Cl2 ? N2Cl4E)N2 + 3O2 ? 2NO3

C)N2 + 2O2 ? 2NO2

 

12.              When the mixture of molecules shown in the molecular-level image undergoes complete reaction, all of these molecules are converted to products.  Which of the following reactions could this represent?

A)2N2 + 3O2 ? 2N2O3D)N2 + 3Cl2 ? 2NCl3

B)N2 + 2Cl2 ? N2Cl4E)3N2 + 2H2 ? 3N2H4

C)O2 + 2H2 ? 2H2O

 

13.              When mixed, solutions of aluminum nitrate, Al(NO3)3, and ammonium carbonate, (NH4)2CO3, will form a precipitate of aluminum carbonate, Al2(CO3)3. The balanced equation is:

2Al(NO3)3(aq) + 3(NH4)2CO3(aq) ? Al2(CO3)3 (s) + 6NH4NO3(aq)

Which of the following statements regarding this reaction is incorrect?

A)2 moles of Al(NO3)3 will react with 3 moles of (NH4)2CO3.

B)If 6 moles of (NH4)2CO3 react with sufficient Al(NO3)3, 2 moles of Al2(CO3)3 will be formed.

C)If 0.5 mole of (NH4)2CO3 react with sufficient Al(NO3)3, 3 moles of Al2(CO3)3 will be formed.

D)If 1.5 moles of Al2(CO3)3 are formed, given sufficient starting materials, then 9 moles of NH4NO3 will also be formed.

E)4 moles of Al(NO3)3 will react with 6 moles of (NH4)2CO3.

 

14.              When mixed, solutions of silver nitrate, AgNO3, and sodium phosphate, Na3PO4, will form a precipitate of silver phosphate, Ag3PO4. The balanced equation is:

3AgNO3(aq) + Na3PO4(aq) ?  Ag3PO4(s) + 3NaNO3(aq)

Which of the following statements regarding this reaction is incorrect?

A)6 moles of AgNO3  will react with 2 moles of Na3PO4.

B)9 moles of AgNO3  will form 2 moles of Ag3PO4, given sufficient Na3PO4.

C)1.5 moles of NaNO3 will be formed when 0.5 mole of Na3PO4 reacts with sufficient AgNO3.

D)3 moles of Ag3PO4 will be formed when 3 moles of Na3PO4 react with sufficient AgNO3.

E)2 moles of Na3PO4 will react with 6 moles of AgNO3.

 

15.              When mixed, solutions of copper(II) nitrate, Cu(NO3)2, and sodium phosphate, Na3PO4, will form a precipitate of copper phosphate, Cu3(PO4)2. The balanced equation is:

3Cu(NO3)2(aq)  + 2Na3PO4(aq) ?  Cu3(PO4)2(s) + 6NaNO3(aq)

Which of the following statements regarding this reaction is incorrect?

A)8 moles of Na3PO4 will react with 12 moles of  Cu(NO3)2.

B)1 mole of NaNO3 will be formed when 0.5 mole of Cu(NO3)2  reacts with sufficient Na3PO4.

C)12 moles of Cu3(PO4)2 will be formed when 36 moles of Cu(NO3)2  reacts with sufficient Na3PO4.

D)If 10 moles of Na3PO4 react with sufficient Cu(NO3)2, 4 moles of Cu3(PO4)2 will be formed.

E)If 5 moles of Cu3(PO4)2 are needed, it would require the combination of 15 moles of Cu(NO3)2  and 10 moles of Na3PO4.

 

16.              Consider the reaction between hydrogen and oxygen gases to form water:

2H2(g) + O2(g) ?  2H2O(l)

Which of the following is not conserved in this reaction?

A)atoms

B)moles of atoms

C)mass

D)both moles of molecules and moles of atoms

E)moles of molecules

 

17.              Consider the reaction between sodium metal and chlorine gas to form sodium chloride:

2Na(s) + Cl2(g) ?  2NaCl(s)

Which of the following is not conserved in this reaction?

A)atoms

B)moles of atoms

C)mass

D)both moles of molecules and moles of atoms

E)moles of molecules

 

18.              Consider the reaction between acetylene, C2H2, and oxygen in a welding torch:

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

Which of the following is not conserved in this reaction?

A)atoms

B)moles of atoms

C)mass

D)both moles of molecules and moles of atoms

E)moles of molecules

 

19.              Which of the following equations is balanced?

A)P4(s) + 10O2(g) ? P4O10(s)

B)ZnS(s) + 3O2(g) ? ZnO(s) + 2SO2(g)

C)NH3(g) + O2(g) ? NO2(g) + H2O(g)

D)4KBrO3(s) ? 3KBrO4(s) + KBr(s)

E)2Na(s) + P(s) ? Na3P(s)

 

20.              Phosphine, PH3, a reactive and poisonous compound, reacts with oxygen as follows:

4PH3(g) + 8O2(g) ? P4O10(s) + 6H2O(g)

If 9.2 moles of phosphine react with sufficient oxygen, how many moles of P4O10 will be formed?

A)  4.0 moles    B)  9.2 moles    C)  37 moles    D)  2.3 moles    E)  6.0 moles