Chemistry Questions
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T or F Polar materials are more likely to behave ideally than non-polar materials.
Absolute zero was initally defined as the temperature at which a gas's _ theoretically decreased down to _a. amount, 0 molesb. volume, 0 Lc. volume, -273.15 Ld. pressure, 0 atme. pressure, -273.15 atm
T or F Polar molecules have weaker attractive forces for each other than non-polar molecules.
Which of the following is the best indicator of how easily a liquid evaporates?a. volumeb. temperaturec. densityd. equilibrium vapor pressure
Which of the following can be used to calculate the amount or grams of a gas (if molar mass is known) and is not typically used with initial and final conditions?a. Combined Gas Lawb. Ideal Gas Lawc. Gay-Lussacs Lawd. Boyles Lawe. Charles Law
For the ideal gas law, PV=nRT, which variable could you increase to decrease V for a set amount of gas?a. Rb. Pc. nd. T
An ideal gas is a hypothetical gasa. made of motionless particles.b. not made of particles.c. whose particles have zero mass.d. that conforms to all of the assumptions of the kinetic theory.
T or F When gases are in a mixture, their individual partial pressures do not affect each other because the gases become attracted to each other.
T or F Pressure and volume have a direct relationship.
What does the constant bombardment of gas molecules against the inside walls of a container produce?a. densityb. diffusionc. pressured. temperature
Which of the following devices measures atmospheric pressure?
Which of the following is the SI unit for pressure?a. torrb. pascalc. mmHgd. atmosphere
If we double the pressure, without altering surface area, force must have been _.a. halvedb. doubledc. multiplied by 4d. held constante. divided by 4
A force that is exerted on a small surface area would have what kind of pressure?a. lowb. highc. equald. burgers
As temperature rises, the speed of particles in a sample _.a. stays the sameb. decreases due to less kinetic energyc. decreases due to less potential energyd. increases due to more kinetic energye. increases due to more potential energy
T or F According to Dalton's Law of Partial Pressures, the product of multiplying all of the partial pressures of the gases that make up a mixture should equal the total pressure of the mixture.
Which of the following variables will, when manipulated, adjust the surface area over which pressure is applied?a. amount of gasb. smell of gasc. temperature of gasd. volume of gas
What would increasing temperature do to the volume of a balloon?a. the volume will increase because of decreased particle collisionsb. the volume will decrease because of decreased particle collisionsc. the volume will increase because of increased particle collisionsd. the volume will decrease because of increased particle collisions
Which of the following best explains why air pressure decreases as you climb up a mountain?a. the density of the air is increasingb. gravity gets stronger as you climbc. there is less air above youd. gravity is getting weaker
T or F Pressure and temperature have a direct relationship.