Chemistry 1 Final Exam-Graded A
Matter - correct answer-anything that occupies space and has mass
mass - correct answer-the amount of matter in an object
pure substance - correct answer-elements and compounds that cannot be broken down
mixtures - correct answer-combinations of two or more substances that can be
separated or physically mixed
heterogeneous mixture - correct answer-non uniform composition ex: trail mix
homogeneous mixture - correct answer-uniform composition ex: salt water
qualitative data - correct answer-physical characteristics
quantitative data - correct answer-measure and calculate (numbers)
Atom - correct answer-smallest particle of an element that retains all the chemical
properties of the element
Nucleus - correct answer-center of atom
protons - correct answer-positively charged particles
neutrons - correct answer-neutral charged particles
electrons - correct answer-negatively charged particles
electron cloud - correct answer-the space where all the electrons are held
elements - correct answer-are pure substances that cannot be broken apart by ordinary
means to other substances
molecule - correct answer-consists of two or more atoms, either of the same type of
element or those of different elements, in a definite ratio
molecular formula - correct answer-molecules are represented by this symbolic formula
compounds - correct answer-pure substances containing different elements in a definite
ratio held together by chemical bonds
, chemical formula - correct answer-compounds represented by this
solids - correct answer-have rigid shape and fixed volume
liquids - correct answer-have no fixed shape and will take the volume of the container
gases - correct answer-expand to fill their container
Physical property - correct answer-any aspect of matter that is observable and
measurable without changing the identity or composition of a substance
intensive property - correct answer-does not depend on the size or amount of matter in
the object. Ex: temp and density
extensive property - correct answer-depends on the size and/or amount of matter in the
object Ex: mass length volume
physical changes examples - correct answer-boiling of liquid, melting of solid, dissolving
a solid in a liquid
density - correct answer-mass/volume
chemical reaction - correct answer-transformation of one or more atoms or molecules
into one or more different molecules
C to F - correct answer-C= 5/9(F-32)
precision - correct answer-how closely related the data agrees with itself
standard deviation - correct answer-often used to determine precision
sqrt(sum of all numbers-mean)^2/(n-1)
accuracy - correct answer-how well the data relates to the accepted values
error - correct answer-the difference between experimental results and the theoretical
value
percent error - correct answer-(experimental value - accepted value)/(accepted value)
*100
scientific notation - correct answer-short hand for very large or very small numbers
Matter - correct answer-anything that occupies space and has mass
mass - correct answer-the amount of matter in an object
pure substance - correct answer-elements and compounds that cannot be broken down
mixtures - correct answer-combinations of two or more substances that can be
separated or physically mixed
heterogeneous mixture - correct answer-non uniform composition ex: trail mix
homogeneous mixture - correct answer-uniform composition ex: salt water
qualitative data - correct answer-physical characteristics
quantitative data - correct answer-measure and calculate (numbers)
Atom - correct answer-smallest particle of an element that retains all the chemical
properties of the element
Nucleus - correct answer-center of atom
protons - correct answer-positively charged particles
neutrons - correct answer-neutral charged particles
electrons - correct answer-negatively charged particles
electron cloud - correct answer-the space where all the electrons are held
elements - correct answer-are pure substances that cannot be broken apart by ordinary
means to other substances
molecule - correct answer-consists of two or more atoms, either of the same type of
element or those of different elements, in a definite ratio
molecular formula - correct answer-molecules are represented by this symbolic formula
compounds - correct answer-pure substances containing different elements in a definite
ratio held together by chemical bonds
, chemical formula - correct answer-compounds represented by this
solids - correct answer-have rigid shape and fixed volume
liquids - correct answer-have no fixed shape and will take the volume of the container
gases - correct answer-expand to fill their container
Physical property - correct answer-any aspect of matter that is observable and
measurable without changing the identity or composition of a substance
intensive property - correct answer-does not depend on the size or amount of matter in
the object. Ex: temp and density
extensive property - correct answer-depends on the size and/or amount of matter in the
object Ex: mass length volume
physical changes examples - correct answer-boiling of liquid, melting of solid, dissolving
a solid in a liquid
density - correct answer-mass/volume
chemical reaction - correct answer-transformation of one or more atoms or molecules
into one or more different molecules
C to F - correct answer-C= 5/9(F-32)
precision - correct answer-how closely related the data agrees with itself
standard deviation - correct answer-often used to determine precision
sqrt(sum of all numbers-mean)^2/(n-1)
accuracy - correct answer-how well the data relates to the accepted values
error - correct answer-the difference between experimental results and the theoretical
value
percent error - correct answer-(experimental value - accepted value)/(accepted value)
*100
scientific notation - correct answer-short hand for very large or very small numbers
