PLEASE HELP ME !!! WILL MARK BRAINLIEST!!! Which of the following must be assumed to be true to test the relationship between temperature and pressure of an enclosed gas? (Choose all correct answers.) (2 pts)
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2 points
The amount of gas in the container may not change.
As the pressure increases, the volume will increase.
The volume of the gas may not change.
When temperature increases, the pressure will decrease.
This is a required question
3. Calculate the number of moles of gas present in a container that has a volume of 3.7L, is at a pressure of 1.2atm and is at a temperature of 290K given the gas constant R = 0.0821 Latm/molK. (2 pts)
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2 points
105.7 moles
0.186 moles
5.36 moles
4. Calculate the temperature of 1 mole of oxygen gas collected in a 10 L container at 1 atm of pressure given the gas constant R = 0.0821 Latm/molK. (2 pts)
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2 points
0.821 K
821 K
244 K
122 K
5. In the gas law formula PV-nRT, the P is the gas _______________. (1 pt)
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1 point
power
pressure
population
moles
6. In the gas law formula PV-nRT, the V is the gas _______________. (1 pt)
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1 point
volume
velocity
viscosity
moles
7. In the gas law formula PV-nRT, the T is the gas _______________. (1 pt)
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1 point
time
temperature in degrees celsius
temperature in Kelvins
moles
8. In the gas law formula PV-nRT, the n is the gas _______________. (1 pt)
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1 point
number of types of gas
integer
mass
moles
9. The formula PV-nRT represents _______________. (1 pt)
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1 point
Boyle's Law
Charles' Law
Gay-Lusac's Law
the Combined Gas Law
the Ideal Gas Law
9. The formula P₁V₁/T₁ = P₂V₂/T₂ represents _______________. (1 pt)
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1 point
Boyle's Law
Charles' Law
Gay-Lusac's Law
the Combined Gas Law
the Ideal Gas Law
10. In the formula P₁V₁/T₁ = P₂V₂/T₂ the subscript 1s represent _______________. (1 pt)
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1 point
the first values given in the problem
the values before the change in conditions
the values that are more important
that there is only one of each of these elements in the compound
11. Which of the following would you use if you are attempting to find the pressure of a gas at one set of conditions? (2 pts)
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2 points
P₁V₁/T₁ = P₂V₂/T₂
PV=nRT
12. Which of the following would you use if you are attempting to find the pressure of a gas given a starting set of conditions and some of the conditions after a change in pressure? (2 pts)
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2 points
P₁V₁/T₁ = P₂V₂/T₂
PV=nRT
13. For an enclosed gas, if the temperature is constant and the pressure goes up, the volume will.... (1 pt)
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1 point
stay constant
increase
decrease
be zero
14. For an enclosed gas, if the pressure is constant and the temperature goes up, the volume will.... (1 pt)
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1 point
stay constant
increase
decrease
be zero
15. For an enclosed gas, if the volume is constant and the temperature goes up, the pressure will.... (1 pt)
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1 point
stay constant
increase
decrease
be zero
15. (bonus)For an enclosed gas, if the pressure is constant what shape would you expect for a graph of the volume vs. temperature? (1 pt)
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1 point
a straight line with a negative slope
a straight line with a positive slope
a straight line with no slope (horizontal)
a power curve with a power of -1
16. Two balloons hold two different gases, both of which behave as ideal gases. The gases are held at the same pressure, volume, and temperature. Which quantity can differ between the two gases? (1 pt)
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1 point
the number of moles of each gas
the gas constant for each gas
the mass of each gas
the molar volume of each gas
17. Which statement explains the molecular changes that occur in an enclosed gas as the pressure increases and the temperature is held constant? (1 pt)
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1 point
An increase in pressure causes the particles to move farther apart, increasing the volume.
An increase in pressure causes the particles to move farther apart, decreasing the volume.
An increase in pressure causes the particles to move closer together, increasing the volume.
An increase in pressure causes the particles to move closer together, decreasing the volume.
