chemistry vocab ch. 10

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vocabbb

mole

the amount of a substance that contains 6.02 X 10 ^23 representattive particles of that substance

Avogadro's Number

the number of representative particles contained in one mole of a substance

representative particle

the smallest unit into which a substance can be broken down without a change in compostition, usually atoms, moleules or atoms

molar mass

a term used to refer to the mass of a mole of any substance

Avogadro's Hypothesis

equal volumes of gases at the same temperature and pressure contain equal numbers of particles

standard temperature and pressure

the conditions under which the volume of a gas is usually measured

molar volume

the volume occupied by 1 mole of a gas at standard temperature and pressure

percent composition

the percent by mass of each element in a copund

empirical formula

a formula with the lowest whole -number ratio of elements ina compound

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