Production of light, heat, sound, gas, and change in color
What are signs of a chemical change
100
Sodium Chloride (The question is NOT What is salt?)
What is a compound? OR What is a pure substance?
100
Caused by the particles of a gas pushing on the walls of its container
What is pressure
100
20 degrees Celcius in Kelvins
What is 293 K
200
A liquid turning into a solid
What is freezing
200
Dissolving sugar in water
What is a physical change
200
Saltwater
What is a homogeneous mixture or a solution?
200
Law that relates the pressure of a a fixed amount of gas to its temperature (when volume is constant)
What is Gay-Lussac's law
200
Substance that has a density of 7.8 g/cc and a volume of 63 cc.
What has a mass of 490 g
300
A solid turning directly into a gas (without melting)
What is sublimation
300
Boiling point, melting point, density, flammability, solubility, reactivity
What are examples of characteristic properties (both chemical and physical)
300
Mixture that settles into layers and can be separated by filtration
What is a suspension
300
Relationship between temperature and volume when mass and pressure are constant
What is direct
300
New temperature of fixed amount of gas with a coonstant volume if old temperature is 400 K, old pressure is 50 atm, and new pressure is 75 atm.
What is 600 K
400
Measures the average speed of particles
What is temperature
400
Substance that has a mass of 140 g and a volume of 52 cc.
What is a substance (possibly aluminum) that has a a density of 2.7 g/cc
400
Separates liquids with different boiling points
What is fractional distillation
400
The volume (of a fixed amount of gas at a constant temperature) increases
What causes pressure to decrease
400
New pressure of fixed amount of gas at constant pressure if it originally had a temperature of 27 degrees celsius and a volume of 50.0 mL, and then was compressed to 25 mL.
What is 150 K
500
Changes that release energy
What is exothermic
500
Can be used to separate saltwater
What is distillation
500
Heterogeneous mixture containing small particles that remain disperced
What is a colloid
500
The new pressure if a fixed amount of gas at a constant volume with a pressure of 50 Pa and a volume of 40 mL is compressed to 20 mL.
What is 100 Pa
500
New volume if 50.0 mL of gas at 345 K with a pressure of 4.0 atm is heated to 420 K and its pressure is increased to 5.0 atm.