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Chapter 10: Chemical Quantities
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Chemistry
06/02/2010

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Term
mole
Definition
the amount of substance that contains
6.02*10^23 representative particles of that substance
Term
molar mass
Definition
a term used to refer to the mass of a any substance
Term
Avogadro's number
Definition
the number of representative particles contained in one mole of a substance; equal to 6.02*10^23
Term
representative particle
Definition
the smallest unit into which a substaance can be broken down without a change in composition, usually atoms, molecules,or ions
Term
Avogadro's hypothesis
Definition
equal volumes if gases at the same temperature and pressure contain equal neumber of particles
Term
standard temperature and pressure (STP)
Definition
the conditions under which the volume of a gas is usually measured; standard temperature is 0 degrees celiusius and standard pressure is 101.3kPa, or atmosphere (atm)
Term
molar volume
Definition
the volume occupied by 1 mol of a gas at STP; 22.4 liter
Term
percent composition
Definition
the percent by mass of each element in the compound
Term
empirical formula
Definition
gives the lowest whole-number ratio of the atoms of the elements in a compound