Name: 
 

Practice Test 2A



Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

The balanced net ionic equation for reaction of calcium carbonate with nitric acid is
A)
mc001-1.jpg
B)
mc001-2.jpg
C)
mc001-3.jpg
D)
mc001-4.jpg
 

 2. 

Which of the following is a weak electrolyte in aqueous solutions?
A)
HNO3
B)
H2SO3
C)
KCl
D)
NaOH
 

 3. 

Which of the following ionic compounds is insoluble in water?
A)
LiNO3
B)
AgBr
C)
(NH4)2CO3
D)
CuSO4
 

 4. 

Which gas has the greatest root mean velocity at STP?
A)
Ar
B)
He
C)
Ne
D)
None of the above (all have the same kinetic energy)
 

 5. 

Which of the following gases has the greatest density at 2.5 atm and 25 °C?
A)
F2
B)
HNF2
C)
NF3
D)
N2O
 

 6. 

What volume of 6.0 M NaOH is required to prepare 180 mL of 0.20 M solution of NaOH?
A)
9.0 mL
B)
18 mL
C)
6.0 mL
D)
3.0 mL
 

 7. 

What is the precipitate that forms when aqueous ammonium sulfide reacts with aqueous copper (II) nitrate?
A)
Cu2S
B)
NH4(NO3)2
C)
NH4NO3
D)
CuS
 

 8. 

What volume of H2 at 675 mmHg and 25 ºC is required to produce 1.00 L of NH3 gas at the same temperature and pressure as shown below:

N2 (g)  +  3 H2 (g)  mc008-1.jpg  2 NH3 (g)
A)
1.00 L
B)
1.50 L
C)
2.00 L
D)
3.00 L
 

 9. 

The temperature of a gas in a sealed container changes from 40 °C to 80 °C.  If the volume remains constant, the pressure will change from 750 mmHg to
A)
665 mmHg
B)
846 mmHg
C)
375 mmHg
D)
1500 mmHg
 

 10. 

The pressure of 4.0 L of nitrogen in a flexible container is decreased to one-half of its original pressure, and its absolute temperature is increased to double its original temperature.  The volume is now
A)
4.0 L
B)
16 L
C)
8.0 L
D)
2.0 L
 

 11. 

A gas sample at STP contains 1.15 g of oxygen and 1.55 g of nitrogen.  What is the volume of this gas sample?
A)
1.26 L
B)
2.04 L
C)
4.08 L
D)
61.0 L
 

 12. 

16.55 mL of 0.844 M NaOH is required to titrate 10.0 mL of an unknown HCl solution.  What is the molarity of the HCl solution?
A)
0.510 M
B)
2.55 M
C)
0.700 M
D)
1.40 M
 

 13. 

A sample of He gas occupies 750 mL at STP.  What is the volume will it occupy at 780 mmHg and –77 ºC?
A)
0.690 L
B)
0.525 L
C)
1.45 L
D)
1.07 L
 

 14. 

How many grams of H3BO3 are needed to prepare 250 mL of 0.125 M H3BO3 solution?
A)
3.09 g
B)
0.312 g
C)
1.93 g
D)
0.505 g
 

 15. 

What is the density (in g/L) of SO2 at 37 °C and 720 mmHg?
A)
2.4
B)
0.48
C)
4.3
D)
1.2
 



 
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