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Gas stoichiometry, gas laws, etc #matthawkinson #switchingchemistrys
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1
What volume of oxygen is needed for the complete combustion of 4.00 L of C
3
H
8
. P and T=constant
5.00L O2
18.0L O2
4.00L O2
20.0L O2
2
Charles law states
volume and temperature are directly proportional
pressure varies inversely with volume
the total pressure is equal to the sum of partial pressures
with constant volume the pressure of a gas is proportional
3
As the temperature of a gas decreases, the motion of the molecules
stays constant
increases
rapidly increases
decreases
4
ideal gas law describes
Mr. Hawkinson's favorite gas law
the pressure, volume, and temperature
the number of moles of gas present
the physical behavior of an ideal gas
5
STP stands for
22.4 L
0° C
standard temperature and pressure
1 mol of gas
6
What is the formula for Charles law?
V1V2 = P1P2
P1V1 = P2V2
V1/T1 = V2/T2
T1/V2 = T2/V1
7
With a constant temp, as the number of collisions decreases the volume can be expected to
disappear
increase
decrease
stay constant
8
Combined gas law describes
the relationship of temperature, pressure, and collisions
how all the gas laws are combined together
the relationship between pressure, temperature, and volume
Ptotal = P1 + P2......
9
Typically what is constant in the combined gas law?
amount of gas, volume
amount of gas, pressure
amount of gas
amount of gas, temperature
10
The pressure of a gas is 738 mmHg. Convert to atmospheres
.952 atm
.804 atm
.903 atm
.971 atm
11
The kinetic molecular theory is
that gases form to shape of the container
states objects in motion have kinetic energy
the behavior of matter in terms of particles in motion
states that particles are at a constant, high speed motion
12
The Gay-Lusaac's law states
pressure is directly proportional to its temperature
volume is directly proportional to moles
volume is proportionate to its temperature
pressure is proportionate to its volume
13
Using Graham's law, how much faster does ammonia diffuse than hydrogen chloride?
1.50
1.67
1.47
1.25
14
Are you ready for this test?
yes
no
15
In the ideal gas equation, to solve for molar mass you can substitute density for m/V
true
false
16
Dalton's law of partial pressures states
total pressure equals the product of the partial pressures
the pressure inside the container equals the presure outside
Ptotal = Pm
total pressure is equal to the sum of the partial pressures
17
If 5.00L of N
2
reacts with H
2
at a pressure of 3.00atm and temp of 298K how much NH
3
forms?
10.00 g NH3
20.8 g NH3
17.04 g NH3
1.23 g NH3
18
The temp of a sample of oxygen at 95.8 kPa is goes from 80.°C to 20.°C Find new pressure
83.2 kPa
71.3 kPa
79.5 kPa
35.1 kPa
19
The formula for Boyle's law is
P1 V1 = P2 V2
V1T1 = V2T2
V1/T1=V2/T2
P1(V1)/T1 = P2(V2)/T2
20
What is molar volume of gas?
volume occupied by one mole of a substance
volume that 1 mol occupies at 0.00°C and 1.00 atm pressure
22.4 L for all gases at any temperature
STP
21
If someone is measuring pressure, they might use any of the following units except
pounds
psi
KiloPascal
atmospheres
22
Find the number of moles of NH
3
contained in a 3.0L vessel at 300. K w/ a pressure of 1.50atm
0.18 mol
.30mol
.12 mol
1.5 mol
23
Boyle's law states
temperature varies directly with pressure
volume w/ a constant temperature varies inversly w/ pressure
volume w/ a constant temperature varies directly w/ pressure
pressure varies inversely with temperature
24
What type of relationship exists between volume and moles of gas in Avogadro's law?
gas pressure is directly proportional to number of moles
temperature and pressure
gas pressure is indirectly proportional to number of moles
gas volume is directly proportional to number of moles
25
Calculate the volume that 2.00kg of methane gas will occupy at STP
2.00*103 L
1.61 x 103 L
2.80*103 L
1.25 x 103 L
26
How many moles of air are in a 6.06-L tire at STP?
0.271mol
0.214mol
0.206mol
.302mol
27
What is temperature?
measure of the average kinetic energy in a sample of matter
all of the above
is only measured in Kelvin for gas laws
heat of the substance
28
80.0 mL of gas is heated from 47°C to 267°C. Find its new volume
135mL
196mL
163mL
285mL
29
As the temperature of a gas increases, its pressure _____, and the number of collisions_____
increases, stays the same
stays the same, increases
increases, decreases
increases, increases
30
The ideal gas law formula is PV=nT
true
false
31
A ball is inflated to a pressure of 32.0lbs (psi). convert to atm.
2.20 atm
2.39 atm
2.18 atm
2.42 atm
