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