A gas expands from a volume of 4.65 L to 6.21 L under a constant external pressure of 2.33 atm. How much work is done on the gas in joules? Give the value to three significant figures. Provide your answer below:
545 J of work is done on a gas and changes the volume by −2.50 L. What is the external pressure? Assume that the external pressure is constant over the change in volume. Give the answer to three significant figures. Provide your answer below: atm
A coat rack weighs 65.0 lbs when it is filled with winter coats and 40.0 lbs when it is empty. The base of the coat rack has an area of 452.4 in2. How much more pressure, in psi (pounds per square inch), is exerted by the coat rack on the floor when it is filled with winter coats than when it is empty? Report your answer with three significant figures. Provide your answer below: psi
−345 J of work is done on a gas and changes the volume by 6.65 L. What is the external pressure? Assume that the external pressure is constant over the change in volume. Give the answer to three significant figures. Provide your answer below: atm
−155 J of work is done on a gas and changes the volume by 0.250 L. What is the external pressure? Assume that the external pressure is constant over the change in volume. Give the answer to three significant figures. Provide your answer below: atm
A sample of helium gas is at 350 K and is heated up to 450 K, where it occupies 2.4 L. What must have been the initial volume? Report your answer with the correct number of significant figures. Provide your answer below:
A sample of argon gas occupies 5.0 L at 298 K. If the temperature is lowered until the volume is 2.0 L, what will be the new temperature? Report your answer with the correct number of significant figures. Provide your answer below: K
A gas is held in a closed container at 55.00∘C and occupies a volume of 355 mL. Assuming the pressure of the gas remains constant, what volume will the gas occupy if the temperature is decreased to 15.00∘C ? Report your answer with three significant figures. Use −273.15∘C for absolute zero. Provide your answer below: mL
A gas with a pressure of 36 atm and a volume of 22.4 L is held at 10.0∘C. What will the pressure (in atmospheres) be if the volume increases to 30.0 L and the temperature increases to 25.0∘C ? Report your answer to two significant figures. Provide your answer below: atm
A gas has a pressure of 8.5 atm and occupies 24 L at 25∘C. What volume (in liters) will the gas occupy if the pressure is increased to 13.5 atm and the temperature is decreased to 15∘C ? Round to the nearest liter. Provide your answer below:
What pressure will be exerted by 1.5 moles of neon gas occupying 5.0 L at 273 K ? Select the correct answer below: 3.5 atm 6.7 atm 9.9 atm 1.0 atm
Consider the reaction for the combustion of methane gas (CH4). CH4(g) + 2 O2(g) ⟶ CO2(g) + 2 H2O(g) What volume of carbon dioxide will be produced as a result of the combustion of 2.0 L of methane gas and 2.0 L of oxygen gas, under conditions of constant temperature and pressure? Assume ideal gas behavior. Provide your answer below: L
Carbon monoxide reacts with oxygen gas to form carbon dioxide according to the following chemical equation. 2 CO(g) + O2(g) ⟶ 2 CO2(g) How many mL of oxygen gas will remain in the reaction vessel when 82.4 mL of carbon monoxide gas reacts with 80.0 mL of oxygen gas to form carbon dioxide under constant pressure and temperature? Assume ideal gas behavior. Round your answer to three significant figures. Provide your answer below: mL
Molar mass (M) is equal to the following, where m is the mass in grams and n is the amount in moles: Select the correct answer below: m×n m/n n/m none of the above
A 4.2 g sample of gas occupies a volume of 10.0 L at a pressure of 180 torr and 20.0∘C. What is the molar mass? Use R = 0.08206 L atm mol K for the gas constant. Use −273.15∘C for absolute zero. Your answer should have two significant figures. Provide your answer below: g/mol
A planet has an atmosphere with an average molar mass of 28.6 g mol as well as a surface temperature of 95 K and pressure of 1.6 atm. What is the density of this planet's atmosphere? Use the ideal gas constant R = 0.08206 L atm mol K Select the correct answer below: 3.16 g L 4.33 g L 5.87 g L none of the above
Car airbags are inflated by a thermal decomposition of the sodium azide (NaN3) that yields nitrogen gas and sodium metal. 2 NaN3(s) ⟶ 2 Na(s) + 3 N2(g) How many liters of nitrogen gas can be prepared from 2.30 mol of NaN3 at 273.15 K and 1.00 atm. Assume ideal gas behavior. Use R = 0.08206 L atm mol K for the ideal gas constant. Report your answer to three significant figures. Provide your answer below:
The formula PM RT, where M is the molar mass, allows us to calculate which of the following? Select the correct answer below: temperature of a gas density of a gas volume of a gas molar mass of a gas
The molar mass of a gaseous compound is 42.79 g mol. At 20.00∘C, the gas has a pressure of 0.237 atm. What is the density of the gas, in grams per liter? Use R = 0.08206 L atm mol L for the ideal gas constant. Use −273.15∘C for absolute zero. Report the answer to three significant figures. Provide your answer below: g/L
If the total pressure of a mixture collected over water is 97.51 torr, what is the pressure of the "dry" gas at 24.0∘C ? Your answer should have three significant figures. Vapor Pressure of Ice and Water in Various Temperatures at Sea Level
What is the volume of 11.6 g of ethane gas (C2H6) at STP? Round to 3 significant figures. Provide your answer below:
An unknown homonuclear diatomic gas has a volume of 2.5 L at standard conditions of temperature and pressure, and it has a mass of 3.571 g. What is the molecular formula for the gas? Provide your answer below:
At STP, what is the volume of 148 g of methane (CH4) ? Round to 3 significant figures. Provide your answer below:
A mixture with H2 and He exerts a total pressure of 0.480 atm. If there is 1.00 g of H2 and 1.00 g of He in the mixture, what is the partial pressure of the helium gas? Round the answer to three significant figures. Provide your answer below: atm
A sample of carbon monoxide was collected over water at a total pressure of 756 torr and a temperature of 18∘C. What is the partial pressure of the carbon monoxide? Select the correct answer below: 771.5 torr 15.5 torr 740.5 torr 3.9 torr
Use the chart above to answer the following question: 0.060 L of neon gas is collected over water at 29.0∘C and has a system pressure of 300 . torr. What is the partial pressure of neon? Your answer should be a whole number. Provide your answer below: torr Vapor Pressure of Ice and Water in Various Temperatures at Sea Level
0.120 L of oxygen gas is collected over water at 30.0∘C with a total pressure of 392 torr. Use the table above to determine the partial pressure of the water vapor. Your answer should have three significant figures. Provide your answer below: Vapor Pressure of Ice and Water in Various Temperatures at Sea Level
The total pressure inside a collection flask is measured as being 670. torr. If the temperature is 18.0∘C, what is the dry gas pressure, in torr? Your answer should have three significant figures. Provide your answer below: torr
Which unit of pressure is equivalent to mmHg ? Select the correct answer below: atmospheres torr pascals kilopascals
Which would apply the most pressure? Select the correct answer below: a 10 N force on a 50 in2 area a 5 N force on a 30 in22 area a 15 N force on a 70 in2 area a 10 N force on a 30 in2 area
Which of these measurements has the largest amount of pressure? Select the correct answer below: 1 pascal 1 kilopascal 1 bar 1 millibar
Which would apply the most pressure? Select the correct answer below: a 100 N force on a 10 ft2 area a 50 N force on a 20 ft2 area a 75 N force on a 10 ft2 area a 150 N force on a 20 ft2 area
A basket weighs 100. lbs and its bottom has an area of 23 in2. What is the pressure exerted by the box on the floor? Report your answer with two significant figures. Provide your answer below: lb/in^2
Air pressure at sea level is equal to: Select the correct answer below: 101,325 torr 760 bar 14.7 psi all of the above
Which unit of pressure is commonly used in meteorology? Select the correct answer below: pascals torr atmospheres bar
Gay-Lussac's law assumes that (Select all the are true. ) Select all that apply: the temperature is held constant the volume is held constant the number of moles is held constant the force is held constant
Which plot will give a straight line? Select the correct answer below: V vs. P V vs. 1 P 1 V vs. 1 P V vs. ln(P)
A sample of carbon dioxide gas at 1.5 atm is compressed until it reaches 4.5 atm and 9.0 L. What was the initial volume of the sample? Select the correct answer below: 3.0 L 15 L 27 L 57 L
If the volume of a gas is kept constant and the temperature in Kelvin is doubled, the pressure will: Select the correct answer below: double quadruple be cut in half be cut in one fourth
Under conditions of constant temperature and amount of substance, a plot of pressure vs. volume for an ideal gas will result in Select the correct answer below: a line a parabola a logarithmic function none of the above
Charles's law is described by which of the following equations? Select the correct answer below: V = kT VT = k V1 T1 = V2 T2 all of the above
Assuming the temperature and the amount of gas are held constant, a plot of volume vs. pressure will give a: Select the correct answer below: line parabola hyperbola none of the above
Which is a correct way of stating Amontons's (Gay-Lussac's) law? Select the correct answer below: P = kT PT = k P1 T1 = P2 T2 all of the above
A gas sample has a volume of 150.0 mL at 30.00∘C and 300.0 kPa. What will the pressure be if it is cooled to 20.00∘C at a constant volume? Report your answer with four significant figures. Provide your answer below: kPa
What pressure will be exerted by 1.5 moles of neon gas occupying 5.0 L at 273 K ? Use R = 0.0821 L atm mol K Select the correct answer below: 3.4 atm 6.7 atm 9.8 atm 1.0 atm
Which law can be derived from the ideal gas law? Select the correct answer below: Boyle's law Charles's law Amontons's law all of the above
The ideal gas law displays the relationship in which of the following? Select all that apply. Select all that apply: Amontons's law Charles's law Boyle's law Avogadro's law
Under which set of conditions will the ideal gas law give the best approximation for the properties of a real gas? Select the correct answer below: low pressure and low temperature low pressure and high temperature high pressure and low temperature high pressure and high temperature
A gas is held in a 12 L container at 25∘C with a pressure of 1.6 atm. If the gas is moved to a 5 L container and the temperature is raised to 30∘C, find the new pressure of the gas in atmospheres. Report your answer to one significant figure. Provide your answer below: atm
A gas has a pressure of 0.750 atm and occupies 20.0 L at 25.00∘C. What volume (in liters) will the gas occupy if the pressure is increased to 1.30 atm and the temperature is decreased to 15.00∘C ? Use −273.15∘C(0 K) for absolute zero. Report your answer with three significant figures. Provide your answer below: L
The density of an ideal gas is directly proportional to which of the following quantities? Select all that apply: temperature pressure number of moles molar mass of the gas
What is the molar mass of a 4.10 g sample of gas exerting 1.35 atm of pressure at 325 K in a 5.00 L container? Your answer should include three significant figures. Provide your answer below: g/mol
Which of the following is the correct expression for Avogadro's law? k is a constant. Select the correct answer below: V = kP V = k n V = kn V = kT
The molar mass of a gas is equal to: Select the correct answer below: mRT PV RT mPV PV mRT PR mVT
A gas with a molar mass of 26.54 g/mol is at a pressure of 172 torr and 27∘C. What is its density? Select the correct answer below: 0.24 g L 0.32 g L 0.49 g L none of the above
How does one calculate the mole fraction of a substance? Select the correct answer below: the total number of moles minus the number of moles of the substance the total number of moles divided by the number of moles of the substance the number of moles of the substance divided by the total number of moles none of the above
What is the mass of 8.55 L of phosphine gas (PH3) at STP? Round to 3 significant figures. Provide your answer below: g
What does the term "dry" gas pressure refer to when a gas sample is collected over water? Select the correct answer below: Atmospheric pressure Vapor pressure of water Total pressure of the pure gas plus the water vapor pressure Pressure of the pure gas
What is the volume of 11.6 g of ethane gas (C2H6) at STP? Round to 3 significant figures. Provide your answer below:
What is one way to calculate the partial pressure exerted by a gas? Select the correct answer below: divide the total pressure by the mole fraction of the gas multiply the total pressure by the mole fraction of the gas add the total pressure to the mole fraction of the gas subtract the mole fraction of the gas from the total pressure
Q 2(c) The pressure-volume diagram to the right shows an isothermal expansion process for 2.20 moles of an ideal gas at 355 K from 0.200 m3 to 0.500 m3. (i) Show that the work done in the isothermal process shown to the right is given by: W = nRT[ln(V2) − ln(V1)] (ii) Calculate the work done in the isothermal process. [2 Marks] Volume
An ideal monatomic gas initially has a temperature of 275 K and a pressure of 7.50 atm. It is to expand from volume 537 cm3 to volume 1530 cm3. If the expansion is isothermal, what are (a) the final pressure and (b) the work done by the gas? If, instead, the expansion is adiabatic, what are (c) the final pressure and (d) the work done by the gas? (a) Number Units (b) Number Units (c) Number Units (d) Number Units
In the graph below, each unit on the horizontal axis is 4.50 m3 and each unit on the vertical axis is 1.50 atm. Convert pressures in atm to pascals (Pa) because pascals is the SI unit that works well with Joules. 1 atm = 101,325 Pa To find the work done along a path, calculate the area between the path curve and the horizontal volume axis. (a) A gas is compressed along the path AC. What is the work done on the gas in this case? J (b) If the gas is instead compressed along the path ABC, what is the work done on the gas? J (c) What is the work done on the gas if the path of compression is along ADC?
Suppose the system pressure is 30.0 atm, the liquid volume is 9.00 liters, the tank diameter is 10.00 cm, the gas contains 40.00 mol% CO2, the Henry's law constant is 9230 atm/(mole/cm3), and the mass-transfer coefficient is 0.030 cm/s. Calculate the time required for CA to reach 1.2351 mol/L.
What relates the partial pressure of a gas to the total pressure of a gas mixture? Select the correct answer below: mole fraction gas percentage compression volume none of the above
When collecting gases over water, the pressure of the pure gas being collected is called the: Select the correct answer below: true gas pressure dry gas pressure wet gas pressure none of the above
In order to know the total pressure of gas collected over water, we need to know: Select the correct answer below: pressure of the water vapor pressure of the pure gas both A and B neither A or B
What is the pressure exerted by water vapor known as? Select the correct answer below: atmospheric pressure vapor pressure of water total pressure of the pure gas plus the water vapor pressure pressure of the pure gas
The pressure inside a propane tank is 87.5 psi. What is this pressure in units of bar? Select the correct answer below: 0.0127 bar 5.87 bar 6.03 bar 18.9 bar
A gas expands from a volume of 3.58 L to 8.64 L under a constant external pressure of 1.22 atm. How much work is done on the gas in joules? Give the value to three significant figures. Provide your answer below: J
A force of 26.4 lb is applied to an area of 1.71 in2. What is the pressure? Report your answer with three significant figures. Provide your answer below: lb/ in^2
A tank of oxygen has a volume of 40.0 L and is held at a pressure of 159 atm at 25∘C. What volume of O2 gas (in liters) would there be at normal body conditions, or 1.00 atm and 37∘C ? Round the answer to two significant figures. Write the answer in scientific notation. When reporting your answer in scientific notation format, use the multiplication symbol, x, not the letter x. Provide your answer below: L
A sample of a gas has a pressure of 1.26 bar at 58.0∘C. What is the pressure of the gas at 118∘C? Report your answer with the correct number of significant figures. Provide your answer below: bar
A sample of a gas has a pressure of 248 mmHg when the volume is 1.05 L. What is the pressure of the gas when the volume is 3.98 L ? Report your answer with the correct number of significant figures. Provide your answer below: mmHg
What will happen to the volume of a gas if its absolute temperature triples (increases by a factor of three) as the amount of gas and the pressure are held constant? Select the correct answer below: The volume will decrease by a factor of three. The volume will triple (increase by a factor of three). The volume will double (increase by a factor of two). The volume will be cut in half (decrease by a factor of two).
What is the volume of a flask containing 0.199 mol of Cl2 at a temperature of 313 K and a pressure of 1.19 atm ? Select the correct answer below: 3.36 L 2.17 L 4.30 L 0.233 L
Which of the following statements is NOT true? Select the correct answer below: One mole of oxygen gas has larger mass than one mole of fluorine gas. One mole of oxygen gas has larger mass than one mole of ammonia gas. One mole of oxygen gas has larger mass than one mole of nitrogen gas. One mole of oxygen gas has larger mass than one mole of carbon monoxide gas.
What is the density of Cl2 gas at a pressure of 1.06 atm and a temperature of 333 K ? Your answer should have three significant figures. Provide your answer below: g/L
A 13.7 g sample of a compound exerts a pressure of 2.01 atm in a 0.750 L flask at 399 K. What is the molar mass of the compound? Your answer should include three significant figures. Provide your answer below: g/mol
What is the mass of 20.0 L of gaseous nitrogen dioxide (NO2) at STP? Round to 3 significant figures. Provide your answer below: g