CHEM 103 COMPREHENSIVE EXAMS LATEST
QUESTIONS AND ANSWERS SURE A+
✔✔factors affecting rates of reactions - ✔✔nature of reactant
concentration - the higher the more
collisions
temperature
catalyst
✔✔catalysts - ✔✔substance that increases a chemical reaction rate without being
consumed in the reactionthey do not change equilibrium
✔✔equilibrium reaction - ✔✔a state in which the rate of the forward reaction equals the
rate of the reverse reaction
✔✔reversible reaction - ✔✔a reaction that can go either way <---->
✔✔solute - ✔✔is dissolved
✔✔solvent - ✔✔does the dissolving
H20 is the universal solvent
✔✔Chemistry - ✔✔the science of materials their composition structure and changes
they undergo
✔✔Matter - ✔✔anything with mass and takes up space
✔✔substance - ✔✔a homogeneous material consisting of one particular kind of matter
✔✔physical states of matter - solid - ✔✔definite shape and volume
, ✔✔physical states of matter - liquid - ✔✔indefinite shape and definite volume
✔✔Physical states of matter - gas - ✔✔indefinite shape and indefinite volume
✔✔physical properties - ✔✔color, crystalline, melting point , boiling point , refractive
index
✔✔chemical properties - ✔✔characteristic of a substance that describes the way the
substance undergoes or resists change to form a new substance
✔✔physical change - ✔✔change of state
✔✔chemical change - ✔✔different substances with new properties formed
✔✔heterogenous mixture - ✔✔contains visibly diffferent phases , different properties
✔✔homogeneous mixture - ✔✔contains only one visibly distinct phase
✔✔element - ✔✔substance that cant be decomposed by chemical means identical
atoms
✔✔compounds - ✔✔can be decomposed into two or more simpler substances by
ordinary chemical means
✔✔diatomic molecules - ✔✔seven elements that when in their natural states are always
pairs
H2 N2 O2 F2 Cl2 Br2 12
✔✔accuracy - ✔✔refers to the correctness of measurement data
✔✔precision - ✔✔refers to the reproductibility of measurement data
✔✔scientific notation - ✔✔smaller than one = negative exponent
larger than one = postive exponent
✔✔density - ✔✔mass/volume
✔✔temperature - ✔✔K = C + 273
C = K - 273
✔✔law of conservation of matter - ✔✔states that matter can be neither created not
destroyed
QUESTIONS AND ANSWERS SURE A+
✔✔factors affecting rates of reactions - ✔✔nature of reactant
concentration - the higher the more
collisions
temperature
catalyst
✔✔catalysts - ✔✔substance that increases a chemical reaction rate without being
consumed in the reactionthey do not change equilibrium
✔✔equilibrium reaction - ✔✔a state in which the rate of the forward reaction equals the
rate of the reverse reaction
✔✔reversible reaction - ✔✔a reaction that can go either way <---->
✔✔solute - ✔✔is dissolved
✔✔solvent - ✔✔does the dissolving
H20 is the universal solvent
✔✔Chemistry - ✔✔the science of materials their composition structure and changes
they undergo
✔✔Matter - ✔✔anything with mass and takes up space
✔✔substance - ✔✔a homogeneous material consisting of one particular kind of matter
✔✔physical states of matter - solid - ✔✔definite shape and volume
, ✔✔physical states of matter - liquid - ✔✔indefinite shape and definite volume
✔✔Physical states of matter - gas - ✔✔indefinite shape and indefinite volume
✔✔physical properties - ✔✔color, crystalline, melting point , boiling point , refractive
index
✔✔chemical properties - ✔✔characteristic of a substance that describes the way the
substance undergoes or resists change to form a new substance
✔✔physical change - ✔✔change of state
✔✔chemical change - ✔✔different substances with new properties formed
✔✔heterogenous mixture - ✔✔contains visibly diffferent phases , different properties
✔✔homogeneous mixture - ✔✔contains only one visibly distinct phase
✔✔element - ✔✔substance that cant be decomposed by chemical means identical
atoms
✔✔compounds - ✔✔can be decomposed into two or more simpler substances by
ordinary chemical means
✔✔diatomic molecules - ✔✔seven elements that when in their natural states are always
pairs
H2 N2 O2 F2 Cl2 Br2 12
✔✔accuracy - ✔✔refers to the correctness of measurement data
✔✔precision - ✔✔refers to the reproductibility of measurement data
✔✔scientific notation - ✔✔smaller than one = negative exponent
larger than one = postive exponent
✔✔density - ✔✔mass/volume
✔✔temperature - ✔✔K = C + 273
C = K - 273
✔✔law of conservation of matter - ✔✔states that matter can be neither created not
destroyed
