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After the following equation is properly balanced, what is the coefficient in front of

 After the following equation is properly balanced, what is the coefficient in front of O2?

S8(s)   +   O2(g)   ?    SO3(g)

A)  2    B)  3    C)  8    D)  12    E)  16

 

33.              After the following equation is properly balanced, what is the coefficient in front of O2(g)?

PbS(s)  +  O2(g)  ?    PbO(s)   +   SO2(g)

A)  1    B)  2    C)  3    D)  4    E)  6

 

34.              When the equation shown is balanced properly, what is the coefficient in front of O2(g)?

C6H14(l)  +   O2(g)  ?   CO2(g)  +   H2O(g)

A)  6    B)  7    C)  9    D)  12    E)  19

 

35.              When aqueous solutions of hydrochloric acid and sodium carbonate are mixed,

A)H2 gas is formed.D)a precipitate is formed.

B)CO2 gas is produced.E)no reaction occurs.

C)sodium metal is formed.

 

36.              A reaction which has two elements as reactants and one compound as a product is:

A)a decomposition reaction.D)a double-displacement reaction.

B)a combination reaction.E)a combustion reaction.

C)a single-displacement reaction.

 

37.              A reaction which has one element and one compound as reactants and one element and one compound as products is:

A)a decomposition reaction.D)a double-displacement reaction.

B)a combination reaction.E)a combustion reaction.

C)a single-displacement reaction.

 

38.              A reaction which has one compound as a reactant and two elements as products is:

A)a decomposition reaction.D)a double-displacement reaction.

B)a combination reaction.E)a combustion reaction.

C)a single-displacement reaction.

 

39.              A reaction which has two compounds as reactants and two compounds as products is:

A)a decomposition reaction.D)a double-displacement reaction.

B)a combination reaction.E)a combustion reaction.

C)a single-displacement reaction.

 

40.              A solution of silver nitrate is mixed with a solution of sodium chloride, resulting in a precipitate of silver chloride and a solution of sodium nitrate.  The class of this reaction is:

A)decomposition reaction.D)double-displacement reaction.

B)combination reaction.E)combustion reaction.

C)single-displacement reaction.

Jan 24 2020 Read more Less More

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