CHEM 134 Final Exam
Extensive property vs. intensive property - answer* Extensive: Examples include mass,
volume, and length.
* Intensive: Examples include density, temperature, and hardness.
Rules for determining sig figs - answer
Density = ? - answer mass / volume
Conservation of Mass and Energy - answer A physical law stating that the total amount
of mass and energy remains constant before/after/during a reaction
Law of Multiple Proportions - answer if two or more different compounds are composed
of the same two elements, then the ratio of the masses of the second element
combined with a certain mass of the first element is always a ratio of small whole
numbers
What evidence about atomic structure was revealed by the experiments of Thomson -
answerusing cathode tubes to determine the existence of electrons
What evidence about atomic structure was revealed by the experiments of Millikan -
answeroil drop experiments accurately measure the value of this elementary charge,
approximately 1.602×10-191.602e-19
What evidence about atomic structure was revealed by the experiments of Rutherford -
answerevidence that the atom consists mostly of space with a tiny, dense, positively
charged nucleus at its center
How to determine the number of protons, neutrons, and electrons from the symbol on
the periodic table - answer
How to find the average atomic mass - answerTo calculate the average atomic mass of
an element:
* Multiply the mass of each isotope by its natural abundance (expressed as a decimal).
* Sum the results from all isotopes.
What is the value of Avagadro's Number and what does it do? - answer6.022e23
used to convert from mass to moles
Differentiate between ionic and molecular compounds. - answer* Ionic compounds are
formed by the transfer of electrons between a metal and a nonmetal, creating a lattice of
charged ions
, * molecular compounds are formed by the sharing of electrons between nonmetals,
resulting in discrete, neutral molecules
What are the four types of chemical formulas? - answerempirical, molecular, structural,
and condensed structural
Ionic vs Molecular Compounds - answerIonic compouds = metal + nonmetal (trans e-)
Molecular compounds = nonmental + nonmetal (share e-)
Nitrate - answerN03-
Nitrite - answerN02-
Carbonate - answerC0^2-_3
Bicarbonate - answerHC03-
Sulfate - answerS0^2-_4
Sulfite - answerS0^2-_3
Phosphate - answerP0^3-_4
Hydrogen Phosphate - answerHPO^2-_4
Dihydrogen Phosphate - answerH2PO4-
Hydroxide - answerOH -1
Cyanide - answerCN-
Acetate - answerC2H3O2- (OR) CH3COO-
Ammonuim - answerNH4+
Permanganate - answerMnO4-
Chromate - answerCrO^2-_4
Dichromate - answerCr2O^2-_4
Perchlorate - answerClO4-
Chlorate - answerClO2-
Hypochlorite - answerClO-
Extensive property vs. intensive property - answer* Extensive: Examples include mass,
volume, and length.
* Intensive: Examples include density, temperature, and hardness.
Rules for determining sig figs - answer
Density = ? - answer mass / volume
Conservation of Mass and Energy - answer A physical law stating that the total amount
of mass and energy remains constant before/after/during a reaction
Law of Multiple Proportions - answer if two or more different compounds are composed
of the same two elements, then the ratio of the masses of the second element
combined with a certain mass of the first element is always a ratio of small whole
numbers
What evidence about atomic structure was revealed by the experiments of Thomson -
answerusing cathode tubes to determine the existence of electrons
What evidence about atomic structure was revealed by the experiments of Millikan -
answeroil drop experiments accurately measure the value of this elementary charge,
approximately 1.602×10-191.602e-19
What evidence about atomic structure was revealed by the experiments of Rutherford -
answerevidence that the atom consists mostly of space with a tiny, dense, positively
charged nucleus at its center
How to determine the number of protons, neutrons, and electrons from the symbol on
the periodic table - answer
How to find the average atomic mass - answerTo calculate the average atomic mass of
an element:
* Multiply the mass of each isotope by its natural abundance (expressed as a decimal).
* Sum the results from all isotopes.
What is the value of Avagadro's Number and what does it do? - answer6.022e23
used to convert from mass to moles
Differentiate between ionic and molecular compounds. - answer* Ionic compounds are
formed by the transfer of electrons between a metal and a nonmetal, creating a lattice of
charged ions
, * molecular compounds are formed by the sharing of electrons between nonmetals,
resulting in discrete, neutral molecules
What are the four types of chemical formulas? - answerempirical, molecular, structural,
and condensed structural
Ionic vs Molecular Compounds - answerIonic compouds = metal + nonmetal (trans e-)
Molecular compounds = nonmental + nonmetal (share e-)
Nitrate - answerN03-
Nitrite - answerN02-
Carbonate - answerC0^2-_3
Bicarbonate - answerHC03-
Sulfate - answerS0^2-_4
Sulfite - answerS0^2-_3
Phosphate - answerP0^3-_4
Hydrogen Phosphate - answerHPO^2-_4
Dihydrogen Phosphate - answerH2PO4-
Hydroxide - answerOH -1
Cyanide - answerCN-
Acetate - answerC2H3O2- (OR) CH3COO-
Ammonuim - answerNH4+
Permanganate - answerMnO4-
Chromate - answerCrO^2-_4
Dichromate - answerCr2O^2-_4
Perchlorate - answerClO4-
Chlorate - answerClO2-
Hypochlorite - answerClO-
