gas
If a 0.750-liter canister contains 1.50 moles of gas and is heated in a fire to a temperature of 1,200 °C, what is the resulting pressure inside the can in atm? Assume the gas behaves ideally.
242 atm
PV = nRT
solve for P
temp. in Kelvin
how much space does a gas occupy at 1 atm and 0 degrees celcius?
22.4 liters
Calculate the number of grams of 38.0 L of butane (C₄H₁₀) gas at 5.0 °C and 715 mm Hg pressure.
91.3g
n = PV/RT
molar mass to get to grams
convert 20psi to mmHg
1034.3mmHg
At a temperature of 315 K, a 6.2 L container holds a mixture of helium (He) and argon (Ar) gases. The total pressure of the system is 1.88 atm. If there are 0.045 moles of helium, what is the partial pressure of argon?
1.69 atm
PV = nRT
solve for P
use the Ideal Gas Law to find the partial pressure of helium, then subtract from the total to get argon’s pressure
During World War 2, what music was used to jam land mines?
bagpipes
If 72.0 L of oxygen gas is collected over water at 35.0 °C when the atmospheric pressure is 745.0 mm Hg, what is the partial pressure of the oxygen gas?
vapor pressure of water at 35C is 42.2mmHg
702.8mmHg
The volume a balloon at STP is 3.3L, how many moles of gas are present?
0.147 mol
What is the molar mass of a gas if its density is 4.21x10^-3 g/ml?
94.3 g/mol
molar mass = density x molar volume
at STP, molar volume is 22.4L/mol
aka 22,400 mL
plug into formula
This is Remy's brother's name in Ratatouille
Emile
Let’s say a relaxed person has a lung capacity of 4.20 liters at a body temperature of 37°C. During a heated argument, their body temperature rises to 40°C. Assuming the pressure remains constant, what would the new volume of their lungs be due to thermal expansion?
4.24 L
V1/T1 = V2/T2
solve for v2
convert temp. to Kelvin
Doug from the Disney movie, "Up" is this breed of dog
golden retriever
A weather researcher releases a balloon that initially has a volume of 2.40 liters at a ground temperature of 15°C and a pressure of 1.02 atm. As it rises to an altitude of 5 kilometers, the pressure drops to 0.598 atm, and the temperature falls to -25°C.
What will be the new volume of the balloon at this altitude? Assume the gas behaves ideally.
3.52 L
P1V1/T1 = P2V2/T2
solve for v2
temp. in Kelvin
Who was the third president of the U.S.?
Thomas Jefferson
At a temperature of 298 K and a pressure of 1.64 atm, a 475 mg sample of gas occupies a volume of 2150 mL.
What is the molar mass of the gas?
3.3 g/mol
PV = nRT
solve for n
then molar mass = mass/moles
what is the number constant for r (with units) in PV = nRT
0.0821 L X atm / mol x K
A 4.65 g sample of a gas occupies a volume of 47.8 L at a temperature of 298 K and a pressure of 1.17 atm.
What is the molar mass of this gas?
2.04 g/mol
PV = nRT
solve for n
then molar mass = mass/moles
This is the name of the professor in the original pokemon games (red, blue, and yellow)
Professor Samuel Oak
A deep-sea diver uses a large scuba tank with a volume of 25.0 liters. The gas inside is pressurized to 180.0 atm at a temperature of 310 K.
How many moles of gas are in the tank? Assume ideal gas behavior.
177 mol
PV = nRT
solve for n
temp. in kelvin
A 2.2 liter canister at a temperature of 55°C has an internal pressure of 3.8 atm. What volume will the gas occupy at STP?
6.96 L
A gas mixture contains 6.0% hydrogen (H₂), 72.0% oxygen (O₂), and 22.0% nitrogen (N₂) by volume.
If the total pressure of the mixture is 3.00 atm, what is the partial pressure of each gas?
H2 = .18 atm
O2 = 2.16 atm
N2 = 0.66 atm
A student mixes 10.0 grams of Baking Soda with 30 mL of 0.777 M vinegar (HC2H3O2). What is the limiting reactant?
NaHCO3 (s) + HC2H3O2 (aq) —> H2O + NaC2H3O2 (aq) + CO2 (g)
acetic acid (fewer moles)
What is the density of oxygen gas at a pressure of 1.20 atm and a temperature of 15 °C?
1.62 g/L
rearrange ideal gas law for density
density = mass (g) over volume (L)
density = PM/RT
M = g/mol
M for O2 = 32g/mol
How many times more likely are you to die in a car than a plane?
137 times
This is the microscopic relative of spiders that lives in all of our eyelash hair follicles and shares a commensalism relationship with humans
eyelash mites!