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25 questions
What is the new pressure of 150 mL of a gas that is compressed to 50 mL when the original pressure was 3.0 atm and the temperature is held constant?
100 atm
0.90 atm
1.0 atm
9.0 atm
What is the volume of 1 mole of gas at Standard Temperature and Pressure (STP)?
22.4 L
2.4 L
.24 L
.024 L
With pressure, volume, and temperature being known values, the ideal gas law can be used to —
calculate the kinetic energy
calculate the chemical formula
calculate the number of moles
calculate the density
Solid sodium carbonate, Na2CO3, reacts with sulfuric acid, H2SO4, to produce CO2 gas according to the following equation:
Na2CO3(s) + H2SO4(aq) → CO2(g) + H2O(l) + Na2SO4(aq)
During an experiment to produce carbon dioxide gas, a student recorded the following data:
Pressure CO2 = 708.1 mm Hg
Volume CO2 = 29.65 mL
Temperature CO2= 25.5 °C
How many moles of CO2 were produced?
1.13 × 10-3 mol CO2
8.57 × 10-1 mol CO2
8.46 × 10-1 mol CO2
8.88 × 102 mol CO2
A sample of a gas in a rigid container at 30.0°C and 2.00 atm has its temperature increased to 40.0°C. What will be the new pressure?
1.50 atm
2.67 atm
2.07 atm
6.04 atm
Calculate the approximate volume of a 1.50 mol sample of gas at 15.0oC and a pressure of 3.75 atm.
1.73 L
5.93 L
8.65 L
9.46 L
The volume of a gas is 50.0 mL at 20.0 K. What will be the new temperature if the gas is compressed to 10.0 mL under constant pressure?
100 K
10.0 K
4.00 K
5.00 K
The volume of a sample of oxygen is 200.0 mL when the pressure is 3.000 atm and the temperature is 37.0 oC. What is the new temperature if the volume increases to 400.0 mL and the pressure decreases to 2.000 atm?
49.33 oC
140.3 oC
209.8 oC
413.0 oC
A fixed quantity of gas is placed inside a container of fixed volume at a temperature of 27°C. The gas has a pressure, P.Which expression shows the pressure of the gas at 57°C?
(27/57) P
(57/ 27) P
(300/330) P
(330/300) P
If the temperature of a gas changes, but the number of moles and volume remain constant, which of the following values must also change?
Density
Pressure
Number of atoms
Mass
Consider four sealed, rigid containers with the following volumes: 50 mL, 100 mL, 250 mL and 500 mL. If each of these contains .25 moles of helium gas at standard temperature, which container would have the greatest pressure?
50 mL
100 mL
250 mL
500 mL
In an experiment with the apparatus shown, the plunger is used to compress helium gas to different volumes. The corresponding volume and pressures (arbitrary units) are measured and displayed in the table below. Which statement best characterizes the data in the table above?
The volume and pressure values are randomly related
As the pressure increases, the volume also increases.
As the volume decreases, the pressure increases.
The volume seems to jump around, going up and then down.
In an experiment with the apparatus shown, the plunger is used to compress helium gas to different volumes. The corresponding volume and pressures (arbitrary units) are measured and displayed in the table below.
Referring to the data table above, what is the best estimate of the pressure if the volume is compressed to a value of 10.0 units?
3.23 units
40.3 units
51.6 units
80.4 units
Observe the balloons A and B above. Both balloons have a temperature of 25.0°C, contain 0.50 moles of gas sealed by the knot at the bottom, and have a volume of 2.2 L.
If balloon A is placed in a freezer with a temperature of -5.50°C, which of the following statements regarding the volumes of the balloons is accurate?
The balloons will remain unchanged and have equal volume at 2.2 L.
Balloon A will be smaller due to fewer moles of gas in the balloon.
Balloon A will be larger due to lower pressure inside the freezer.
Balloon A will be smaller due to the gas particles moving slower.
Which of the following is not one of the postulates of the kinetic molecular theory for ideal gases?
The collisions between particles are elastic.
The particles attract and then repel each other.
The particle size is very small compared to the space between the particles.
The particles are in constant random motion.
Which of the following statements is related to a postulate (assumption) of the kinetic molecular theory of gases?
Gas particles are in constant motion, giving them a large amount of potential energy.
Gas particles are in constant motion so they lose kinetic energy when they collide with the walls of their container.
Gas particles are in constant motion because they are strongly attracted to each other.
Gas particles are in constant motion and are very far apart compared to their size.
Two gas molecules collide together in a box container. Which reaction accurately portrays the kinetic molecular theory?
The two molecules will stay together because they are attracted to each other.
The two molecules will move off in opposite directions because they are repelled by each other.
The two molecules will move in different directions without being attracted or repelled by the other.
The two molecules will either be attracted or repelled by each other depending on the charge of each gas molecule.
Which of the following is NOT a postulate of the Kinetic Molecular Theory?
The average speed of particles is proportional to the temperature.
Particles move in straight lines until they collide with something.
There are no attractive or repulsive forces between particles.
Larger particles exert more pressure at a given temperature.
Ammonia is produced from the reaction of nitrogen and hydrogen gases. What volume of hydrogen at STP is required to produce 25 g of ammonia?
N2(g) + 3H2(g) → 2NH3(g)
33 L
1.1 L
49 L
25 L
Given the following reaction for respiration, C6H12O6 + 6O2 → 6CO2+ 6H2O, how many liters of CO2 can be produced from 1.00 x 103 g of sugar at standard temperature and pressure?
28.9 L
124 L
180 L
746 L
Given the balanced equation of 2Fe(OH)3 → Fe2O3 + 3H2O, how many liters of water can be produced from 1.00 x 102 g Fe(OH)3 of at standard temperature and pressure?
20.9 L
23.7 L
31.4 L
106 L
Given the balanced equation of NaOH(s) + CO2(g) → NaHCO3, how many liters of Carbon Dioxide are needed to produce 2.00 x 102 g of NaHCO3 of at standard temperature and pressure?
2.38 L
9.41 L
53.3 L
84.0 L
How many molecules are produced from 25.0 L of oxygen gas?
2 H2 (g) + O2 (g) --> 2 H2O (g)
1.34 x 1024
1.88 x 1024
3.01 x 1025
6.72 x 1023
Given the following reaction for photosynthesis, 6 CO2 + 6 H2O → C6H12O6 + 6 O2, how many liters of O2 can be produced from 100 g of water at standard temperature and pressure?
1.49 L
24.8 L
80.4 L
124 L
Ammonia and oxygen can react to produce nitrogen and water.
Following is the balanced equation:
4NH3(g) + 3O2(g) 2N2(g) + 6H2O(g)
Suppose 17.0 grams of ammonia react completely with oxygen. How many liters of nitrogen will be produced at STP?
11.2
14.0
22.4
28.0
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