Worksheetschem
Total questions: 39
Worksheet time: 8hrs 36mins
Name
Class
Date
1.
Determine the Celsius temperature of 2.49 moles of gas contained in a 1.00-L vessel at a pressure of 143 kPa.
a)
-266 degrees C
b)
-622 degrees C
c)
622 degrees C
d)
266 degrees C
2.
In the ideal gas law, which variable represents the gas constant?
a)
n
b)
R
c)
T
d)
V
3.
Determine the number of moles in a container of gas at STP with a volume of 99.2 L.
a)
2222.08 moles
b)
4.43 moles
c)
22.4 moles
d)
76.8 moles
4.
What about gasses can be measured?
a)
Pressure and Volume
b)
Temperature, Volume, and Pressure
c)
Volume and Temperature
d)
Pressure, Temperature, Volume, and Moles
5.
If the pressure exerted by a gas at 25 degrees C in a volume of 0.044 L is 3.81 atm, how many moles of gas are present?
a)
.002766 mole
b)
.0069 mol
c)
2.766 mol
d)
9.887 mol
6.
In order to solve gas law calculations, temperature must be measured in:
a)
Fahrenheit
b)
Celsius
c)
Kelvin
d)
It doesn't matter
7.
As number of moles goes up, volume
a)
goes down.
b)
goes up.
c)
stays the same
8.
At STP, what is pressure in atmospheres?
a)
1 atm
b)
10 atm
c)
0 atm
d)
100 atm
9.
Calculate the volume that a 0.323-mol sample of a gas will occupy at 265 K and a pressure of 0.900 atm.
a)
7.18 L
b)
7.81 L
c)
4.63 L
d)
4.36 L
10.
Determine the Kelvin temperature required for 0.0470 mol of gas to fill a balloon to 1.20 L under .998 atm pressure.
a)
0 K
b)
107 K
c)
207 K
d)
307 K
11.
What is the pressure exerted by 5.00 moles of nitrogen gas contained in a 30.0 Liter container at 25.0 °C?
a)
3670 atm
b)
0.245 atm
c)
4.08 atm
d)
605 atm
12.
At 17 °C, a 0.80 mole sample of a gas exerts a pressure of 1.2 atmospheres. What is the volume of the container?
a)
22.9 Liters
b)
2355 Liters
c)
0.0630 Liters
d)
15.9 Liters
13.
Dalton's Law states...
a)
that at a constant temperature the volume of a confined ideal gas varies inversely with its pressure.
b)
that the total pressure exerted by the mixture of non-reactive gases is equal to the sum of the partial pressures of individual gases
c)
how gases tend to expand when heated
d)
that the density of an ideal gas at constant pressure varies inversely with the absolute temperature of the gas.
14.
Three gases, Ar, N2 and H2 are mixed in a 500L container. Ar has a pressure of 255 torr, N2 has a pressure of 228torr and H2 has pressure of 752torr. What is the total pressure in the container?
a)
483torr
b)
270torr
c)
1235torr
15.
What does the variable "n" represent in the ideal gas law?
a)
pressure
b)
volume
c)
moles
d)
the gas constant
e)
temperature
16.
What does the variable "R" represent in the ideal gas law?
a)
pressure
b)
volume
c)
moles
d)
the gas constant
e)
temperature
17.
How many moles of propane gas are in a 7.0 L tank at 20°C and 5.45atm of pressure?
a)
0.629 mol
b)
1.59 mol
c)
23.2 mol
d)
917 mol
18.
At what temperature (in Kelvin) would 4.0 moles of hydrogen gas in a 100 liter container exert a pressure of 1.00 atmospheres?
a)
0.0305 K
b)
0.487 K
c)
32.8 K
d)
304.5 K
19.
A metal cylinder contains Oxygen and Helium at a total pressure of 450 KPa. What is the partial pressure of the oxygen if the the tank contains 70% helium?
a)
315 Kpa
b)
135 Kpa
c)
0.428 Kpa
d)
30 Kpa
20.
Mole ratios are obtained from the
a)
balanced chemical equation
b)
periodic table
c)
molar mass
21.
How many step will it take for me to go from moles given to moles unknown?
a)
1
b)
2
c)
3
d)
4
22.
How many steps will it take me to go from grams to grams?
a)
4
b)
3
c)
2
d)
1
23.
How many step will it take for me to go from grams to moles unknown
a)
1
b)
2
c)
3
d)
4
24.
I use molar mass when the problem gives me grams?
a)
False
b)
True
25.
I use 6.02 x 1023 when the problem gives me molecules?
a)
True
b)
False
26.
I use mole ratio (coefficients) from balanced chemical equation?
a)
True
b)
False
27.
Balance the following reaction :
CaC₂(s) + H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)
CaC₂(s) + H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)
a)
1,2,2,2
b)
1,2,1,1
c)
2,1,1,1
d)
2,1,2,1
28.
If you start with atoms of NaOH and are going to moles of NaOH, how many steps is it?
a)
1
b)
2
c)
3
d)
4
29.
What is the first thing you must do to solve a stoichiometry problem?
a)
Write a Balanced Equation
b)
Panic
c)
Write an Unbalanced Equation
d)
Ask for help
30.
What is the molarity of 3 mole of hydrochloric acid in 3 L of water.
a)
3
b)
1
c)
6
d)
9
31.
What is the molarity of 4 grams of sodium chloride in 3,800 mL of solution?
a)
0.018 M
b)
0.018 mol
c)
1.052 M
d)
1.052 mol
32.
The ___ is the thing being dissolved
a)
solute
b)
solvent
33.
True or false? Insoluble means that two substances can dissolve in one another.
a)
true
b)
false
34.
Which sweet tea would you expect to taste the sweetest?
a)
1M
b)
3M
c)
3.1M
d)
2.5M
35.
What is the formula for molarity?
a)
moles/grams
b)
moles/kilograms
c)
moles/milliliters
d)
moles/liters
36.
Molarity is measured in
a)
moles per kg
b)
mols per L
c)
moles per kJ
d)
moles per mL
37.
How many L are required to make 3.5 M hydrochloric acid using 1.1 moles?
a)
3.18 L
b)
0.31 L
c)
3.85 L
d)
4.6 L
38.
If you have 0.045 L of 0.465 M potassium bromide. How many moles of potassium bromide are present?
a)
20.9 mol
b)
0.021 mol
c)
0.02 mol
d)
0.0209 mol
39.
What is the molarity in 650. ml of solution containing 63 grams of sodium chloride?
a)
2.4 M
b)
0.86 M
c)
1.7 M
d)
0.54 M
100 %
