Chemistry semester 2, unit 1
Which separation technique involves heating the components of a solution to their boiling points
separation by distillation
what two factors determine boiling point
temperature and pressure
what characterizes a heterogenous mixture
the mixture is made up of different consistencies
What causes a sealed bag of vegetables to expand when it is heated in a microwave?
the temperature of the gas changes
according to the ideal gas law, what happens to the volume of a gas when the pressure doubles
the volume is halved
What happens when the temperature of a gas is increased
the volume is increased
What is an expression of Charles Law (k=constant)
v/t = K
Which of the following forces would result in the lowest melting point
van der waal forces
what is the molality of a solution made by dissolving 6 moles of NaOH in 3 kg of water
2 mol/kg
What type of solid is crystalline boron
network solid
liquid helium has a boiling point of 4.2 Kelvins, what is this in Celsius
-268.8
what does avogadros law say about a gas at STP
1 mole of any gas at STP has a volume of 22.4 L
which of the following intermolecular forces is the strongest
Hydrogen bonding
what kind of solid breaks with no repeating structure
amorphous solid
which of the following in an example of a solution
an iron alloy
what is the best summary of kinetic theory
atoms and molecules are always in motion
what is molality
concentration of a solute in mol/kg
which of the following substances would most likely be malleable
copper
What forces typically hold nonmetal atoms together within a molecule
covalent bonds
what happens to a solute
it is dissolved in a solvent
what temperature unit is used in the ideal gas law
kelvins
what is another way of describing a freezing point change
melting point change
what does it mean for a solution to be supersaturated
more solute has dissolved than should be possible
