Final

1    In the reaction N2 + 3 H2 -> 2 NH3, what is the mole ratio of hydrogen to nitrogen?

 

A   1 : 1

B   1 : 2

C   3 : 1

D   3 : 2

 

 

 

 C   3 : 1

2   What is the new pressure of 150 mL of a gas that is compressed to 50 mL when the original pressure is 3.0 atm and the temperature is held constant?

 

 100 atm

 0.90 atm

 1.0 atm

 9.0 atm

 

 

 

H   1.0 atm

3   Carbon tetrachloride is a solvent wich is used as a refrigerant and also as a cleaning agent. Prior to the 1950s, carbon tetrachloride was maufactured by the chlorination of carcon sidulfide:

CS2 + 3 Cl2 -> CCl4 + S2Cl2

but now it is mainly produced from methane:

CH4 + 4 Cl2 – > CCl4 + 4 HCl

How many grams of carbon tertachloride can be proiduced from reacting 709.0 grams of chlorine (Cl2) qith excess methane?

 

A   3.845 g

B   61.53 g

C   384.5 g

D   6153 g

 

 

 

 C   384.5 g

4   In the reaction ! + B -> C + D, if element B is in excess, then —

 

F   A is the limiting reactant

G   B is the limiting reactant

H   C is the limiting reactant

J   Both A and B are limiting reactants

 

 

 

 F   A is the limiting reactant

5   Use the information in the table to answer the question.


Which is the correct heat of reaction ( ? H rxn) for the decomposition of two moles of water according to the following endothermic reaction?

2H20(g) -> 2H2(g) + O2(g)


A   ? H°f  =  +241.8 kJ

B   ? H°f  =  -285.8 kJ

C   ? H°f  =  +438.6 kJ

D   ? H°f  =  -571.6 kJ

 

 

 

C   ? H°f  =  +438.6 kJ

6  

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