CHM 113 FINAL EXAM WITH CORRECT
ACTUAL QUESTIONS AND CORRECTLY
WELL DEFINED ANSWERS LATEST
ALREADY GRADED A+
Charge of element - ANSWERS-protons minus electrons. top
number to right of element
isotopes - ANSWERS-atoms of same element with different
masses. Same protons, different neutrons.
7 diatomic molecules - ANSWERS-hydrogen, nitrogen,
oxygen, fluorine, chlorine, bromine, Iodine
Empiricle formula - ANSWERS-lowest whole number ratio
2 types of Ions are - ANSWERS-cations: formed by metals
anions: formed by nonmetals
,formula weight vs molecular weight - ANSWERS-formula:
sum of atomic weights for atoms in a formula
molecular: sum of atomic weights for atoms in a molecule
percent composition - ANSWERS-(number of atoms)(atomic
weight of element)/formula weight of compound
determining molecular formula - ANSWERS-whole number
multiple=molecular weight /empiricle formula weight
limiting reactant - ANSWERS-the reactant that will run out
first
First law of thermodynamics - ANSWERS-Energy can be
transferred and transformed, but it cannot be created or
destroyed.
equation for changes in internal energy - ANSWERS-∆E=q+w
change in enthalpy equals - ANSWERS-heat gains or lost
, Hess's law - ANSWERS-the overall enthalpy change in a
reaction is equal to the sum of enthalpy changes for the
individual steps in the process
all bond enthalpy is ___ but bonds broken are ___ -
ANSWERS-positive, negative
Lowest --> highest wavelengths - ANSWERS-gamma rays, x
rays, UV, visible, Infrared, microwaves, radio
Lowest --> highest frequencies - ANSWERS-radio,
microwaves, infrared, visible, UV, x rays, gamma rays
Photoelectric equation - ANSWERS-E=hv
h is a constant, v is the frequency
lower energy means for wavelength and frequency -
ANSWERS-higher wavelength and lower frequency
Bohr Model - ANSWERS-model of the atom in which
electrons move rapidly around the nucleus in paths called
orbits. Problem is it only works for hydrogen
ACTUAL QUESTIONS AND CORRECTLY
WELL DEFINED ANSWERS LATEST
ALREADY GRADED A+
Charge of element - ANSWERS-protons minus electrons. top
number to right of element
isotopes - ANSWERS-atoms of same element with different
masses. Same protons, different neutrons.
7 diatomic molecules - ANSWERS-hydrogen, nitrogen,
oxygen, fluorine, chlorine, bromine, Iodine
Empiricle formula - ANSWERS-lowest whole number ratio
2 types of Ions are - ANSWERS-cations: formed by metals
anions: formed by nonmetals
,formula weight vs molecular weight - ANSWERS-formula:
sum of atomic weights for atoms in a formula
molecular: sum of atomic weights for atoms in a molecule
percent composition - ANSWERS-(number of atoms)(atomic
weight of element)/formula weight of compound
determining molecular formula - ANSWERS-whole number
multiple=molecular weight /empiricle formula weight
limiting reactant - ANSWERS-the reactant that will run out
first
First law of thermodynamics - ANSWERS-Energy can be
transferred and transformed, but it cannot be created or
destroyed.
equation for changes in internal energy - ANSWERS-∆E=q+w
change in enthalpy equals - ANSWERS-heat gains or lost
, Hess's law - ANSWERS-the overall enthalpy change in a
reaction is equal to the sum of enthalpy changes for the
individual steps in the process
all bond enthalpy is ___ but bonds broken are ___ -
ANSWERS-positive, negative
Lowest --> highest wavelengths - ANSWERS-gamma rays, x
rays, UV, visible, Infrared, microwaves, radio
Lowest --> highest frequencies - ANSWERS-radio,
microwaves, infrared, visible, UV, x rays, gamma rays
Photoelectric equation - ANSWERS-E=hv
h is a constant, v is the frequency
lower energy means for wavelength and frequency -
ANSWERS-higher wavelength and lower frequency
Bohr Model - ANSWERS-model of the atom in which
electrons move rapidly around the nucleus in paths called
orbits. Problem is it only works for hydrogen
