Penny’s Final Review

standard tempurature and pressure
0;C and 1 atm
percent compostion
the percent by mass of each element in a compound
Avogadro’s number
number of representative particles in 1 mole of that substance
representative particle
an atom, an ion, or a molecule, depending upon the way a substance commonly exists
empirical formula
the smallest whole number ratio of the atoms in a compound
SI unit used to measure amount of substance
atomic mass
number of grams of an element that is numerically equal to the atomic mass of the element in amu
molar volume
the volume occupied by a mole of any gas at STP
molar mass
the mass of a; mole of any element or compund
gas at STP
The molar mass of a substance can be calculated from its density alone, if that substance is a __________.
empirical formula
the lowest whole number ratio of the elements in a compound is called the _________.
Avogadro’s number of representative particles is equal to one __________.
skeleton equasion
an equasion that does not indicate relative amounts of reactants and products
a new substance formed in a chemical reaction
a starting substance in a chemical reaction
chemical equasion
a concise representation of a chemical reaction
balanced equasion
an equasion in which each side has the same number of atoms;of each element

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