Terms and Theories
Gas Laws
Moles and Gases
Stoichiometry
Random!
100
Name the 4 layers of the atmosphere
troposphere, stratosphere, mesosphere, thermosphere
100
1.00 L of a gas at 1.00 atm pressure is compressed to 0.437 L. What is the new pressure of the gas?
2.29atm
100
State Avogardro's Law
Avogardro's law states that the volume of gases present is proportional to the moles of gas present.
100
Consider the following reaction: CaCO3(s) --> CaO(s) + CO2(g) How many liters of carbon dioxide will be produced at STP if 2.38 kg of calcium carbonate reacts completely?
533L
100
What is meant by the term “molar volume of a gas?”
Molar volume of a gas is the volume that one mole of gas takes up at a specific temperature and pressure.
200
Explain what happens on a molecular level when ice melts to become liquid water.
When ice melts, intermolecular forces between water molecules are being broken. This results in an increase of energy in the molecules, allowing them to overcome the intermolecular forces and have rotational and vibrational motion.
200
A balloon inflated with air in a room in which the temperature of the air is 22C has a volume of 650 mL. The balloon is put into a refrigerator at 4C. Predict the volume of the balloon, assuming that the amount of gas and pressure has not changed.
610 mL
200
At STP, 1 mol of oxygen gas has a volume of 22.4 L. Determine the mass and number of molecules in a 44.8 L sample of the gas.
1.20 × 10^24 molecules
200
Solid iron (III) hydroxide decomposes to produce iron (III) oxide and water vapor. If 0.75 L of water vapor are produced at STP, how many grams of iron (III) hydroxide were used?
2.35g
200
A tire has a volume of 535 cm3 at a temperature of 20.0°C. While in use, the temperature of the tire rises to 65.0°C. Calculate the new volume of the tire, assuming constant pressure and amount of air.
617cm3
300
Explain the relationship stated by Boyle's law.
Boyle's law talks about the relationship between pressure and volume, given that temperature is constant. When the volume of a gas decreases, the gas molecules will collide more with the container and with one another, increasing the pressure. He states that the pressure and volume are inversely proportional to one another.
300
If a gas sample has a pressure of 30.7 kPa at 0.00°C, by how many degrees Celsius does the temperature have to increase to cause the pressure to be 160 torr?
-84C
300
A gas mixture contains 12% helium, 25% argon, and 63% neon. If the total pressure is 2.0 atm, what is the partial pressure of each gas?
helium = 0.24 atm argon = 0.50 atm neon = 1.2 atm
300
What volume of hydrogen gas is produced when excess sulfuric acid reacts with 40.0 g of iron at 18.0°C and 100.3 kPa?
17.3L
300
Find the temperature, in °C, of 2.50 mol of gas that occupies a volume of 56.5 L at a pressure of 1.20 atm.
57.4°C
400
State the five assumptions made for an ideal gas.
1.The volume of a molecule of gas is negligible compared to the volume of the container, meaning the container is mostly “full” of empty space. 2.Gas molecules neither attract nor repel each other. 3.Gas molecules more very fast in straight lines until the bounce off of something. 4.When gas molecules collide with something, the collisions cause no loss of energy. 5.The amount of kinetic energy and temperature are directly correlated. The hotter it gets, the faster they go.
400
A flask that can withstand a maximum internal pressure of 4.00 atm is filled with a gas at 20.0°C and 0.98 atm. At what temperature, in degrees Celsius, will the flask explode?
922°C
400
A commercial refrigeration unit accidentally releases 12.5 L of ammonia gas at SATP. Determine the mass and number of molecules of ammonia gas released.
moles = 0.504mol mass = 8.60g molecules = 5.18 x 10^24 molecules
400
At STP, 0.72 g of hydrogen gas reacts with 8.0 L of chlorine gas. How many litres of hydrogen chloride gas are produced?
16 L
400
A small carbon dioxide gas cylinder used to propel paint balls has a mass of 56.3 grams. When all the gas is expelled from the cylinder and the cartridge is empty, the cylinder has a mass of 50.4 g. If the volume of the cylinder is 25L and the temperature of the cylinder initially was 23°C, determine the initial pressure of gas in the cylinder in units of kPa.
13kPa
500
You and some friends to out on a winter day to play soccer. Indoors, the soccer ball seems fine. However, when you go outside, the ball seems soft and deflated. Explain why this is the case.
When you go outside, the temperature of the ball decreases. This causes the gas particles to slow down, resulting in a decrease in volume and pressure.
500
A small balloon contains 275 mL of helium gas at a temperature of 25.0°C and a pressure of 350 kPa. What volume would this gas occupy at 10.0°C and 1 atm?
910 mL
500
A 1.58 g sample of gas occupies a volume of 500.0 mL at STP. Calculate the molar mass of the gas.
70.8 g/mol
500
What mass of oxygen gas reacts with hydrogen gas to produce 0.62 L of water vapour at 100.0°C and 101.3 KPa?
0.32 g
500
What is the molecular formula of an unknown gas that is composed of 80.0% carbon and 20.0% hydrogen if a 4.60 g sample occupies a 2.50 L volume at 25.00°C and 152 kPa?
C2H6
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