CHEM 120 MIDTERM EXAM 2
• Ideal Gas Law
Answer: the relationship which describes the behavior of an ideal gas
PV=nRT
• Dalton's Law of Partial Pressures
Answer: Law that states total pressure of a gas isequal to the sum of the partial
pressure of the component gases
• Molar mass
Answer: the mass in grams of one mole of a substance g/mol
Add together mass listed on periodic table for each element
• Molarity=
Answer: Molarity= moles of solute / liters of solution
• dilute solution
Answer: A mixture that has only a little solute dissolved in a certainamount of
solvent
• concentrated solution
Answer: A mixture that has a lot of solute dissolved in it
• Pressure
Answer: the amount of force exerted per unit area of a surface
• Gaseous state
Answer:
-changing volume and changing shape
-exists at HIGH temperatures, LOW pressures)
, -WEAKEST nature bc it moves randomly
• mole ratio
Answer: a conversion factor derived from the coefficients of a balancedchemical
equation interpreted in terms of moles
• balanced equation
Answer: chemical equation with the same number of atoms of eachelement on both
sides of the equation
• % mass=
Answer: % mass = (mass solute / mass solution) x 100%
• % composition=
Answer: % E (E is any element) = (mass of E / mass of sample) x100%
• Scientific Method Steps
Answer: Observations, Hypothesis, Experiment, Data Collection (Results), Theory
• independent variable
Answer: The experimental factor that is manipulated; the variablewhose effect is
being studied
• dependent variable
Answer: The outcome factor; the variable that may change in re-sponse to
manipulations of the independent variable.
• quantitative properties
Answer: mass, volume, density, temperature
• Qualitative properties
Answer: color and odor
• giga-
• Ideal Gas Law
Answer: the relationship which describes the behavior of an ideal gas
PV=nRT
• Dalton's Law of Partial Pressures
Answer: Law that states total pressure of a gas isequal to the sum of the partial
pressure of the component gases
• Molar mass
Answer: the mass in grams of one mole of a substance g/mol
Add together mass listed on periodic table for each element
• Molarity=
Answer: Molarity= moles of solute / liters of solution
• dilute solution
Answer: A mixture that has only a little solute dissolved in a certainamount of
solvent
• concentrated solution
Answer: A mixture that has a lot of solute dissolved in it
• Pressure
Answer: the amount of force exerted per unit area of a surface
• Gaseous state
Answer:
-changing volume and changing shape
-exists at HIGH temperatures, LOW pressures)
, -WEAKEST nature bc it moves randomly
• mole ratio
Answer: a conversion factor derived from the coefficients of a balancedchemical
equation interpreted in terms of moles
• balanced equation
Answer: chemical equation with the same number of atoms of eachelement on both
sides of the equation
• % mass=
Answer: % mass = (mass solute / mass solution) x 100%
• % composition=
Answer: % E (E is any element) = (mass of E / mass of sample) x100%
• Scientific Method Steps
Answer: Observations, Hypothesis, Experiment, Data Collection (Results), Theory
• independent variable
Answer: The experimental factor that is manipulated; the variablewhose effect is
being studied
• dependent variable
Answer: The outcome factor; the variable that may change in re-sponse to
manipulations of the independent variable.
• quantitative properties
Answer: mass, volume, density, temperature
• Qualitative properties
Answer: color and odor
• giga-
