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Benchmark 4 Review!!!
Test Description: Review Problems for the end of the year
Instructions: Answer all questions to get your test result.
1) In this equation A what is the acid?
A
NH4Cl
B
HCl
C
NH4OH
D
H2O
2) For equation A, what is the salt created?
A
H2O
B
NH4OH
C
HCl
D
NH4Cl
3) Which of the following would effuse the FASTEST?
A
Al
B
P
C
Br
D
Mg
4) A gas has a constant temperature. The starting pressure is 4 atm and takes up a volume of 15 L. If the new pressure is 6 atm, what is the new volume?
A
1.6 L
B
.0444 L
C
10 L
D
22.5 L
5) A sample of an ideal gas at 171°C and 4.0 atmospheres has a volume of 4.5 Liters, how many moles of the gas does the sample contain?
A
0.494 moles
B
36.4524 moles
C
18 moles
D
2.025 moles
6) For equation B, if you have 5 moles of oxygen gas, how many moles of Na2O will you make?
A
0.4 moles
B
2.5 moles
C
10 moles
D
5 moles
7) For equation B, if you produce 16 moles of Na2O, how much sodium did you use?
A
2 moles
B
32 moles
C
16 moles
D
8 moles
8) Which gas would effuse the SLOWEST?
A
N2
B
Al
C
Mg
D
C
9) For equation B, if you make 10 moles of Na2O, how many GRAMS of oxygen gas did you use?
A
160 grams
B
5 grams
C
80 grams
D
6.4 grams
10) For equation B, how many grams of sodium would react with 3 moles of oxygen gas?
A
132 grams
B
1.92 grams
C
0.52 grams
D
276 grams
11) For equation B, if you are given 44 grams of sodium, how many moles of product can you make?
A
22 moles
B
0.96 moles
C
0.475 moles
D
3.8 moles
12) If you have 4.5 moles of salt and dissolve it in 400 mL of water, what is the molarity?
A
0.01125 M
B
0.089M
C
11.25 M
D
89 M
13) I give you 1,000mL of a solution and you drop in 54 grams of aluminum, what is the molarity?
A
0.054M
B
54M
C
2M
D
0.002 M
14) When you double the temperature, what happens to the pressure?
A
nothing
B
cut in 1/2
C
doubles
D
cut by 1/4
15) Which of the following is not a unit for pressure?
A
atm
B
mmHg
C
mL
D
torr
16) If I keep the temperature constant and make my pressure go from 5atm to 15 atm, what happens to my volume?
A
cut by 1/3
B
triples
C
cut by 1/2
D
doubles
17) d. If I have an unknown quantity of gas at a pressure of 0.5 atm, a volume of 25 liters, and a temperature of 300 K, how many moles of gas do I have?
A
20 moles
B
2.05 moles
C
34 moles
D
0.508 moles
18) When you add an acid to a base which of the following DOES NOT HAPPEN?
A
make a weaker acid
B
a chemical reaction takes place
C
make water
D
make a salt
*select an answer for all questions
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