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Terms/Examples related to Chemistry Formula Stoichiometry

mass of an atom on the C-12 = 12.000000 u scale (relative) atomic mass
1/12th the mass of a C-12 isotope atomic mass unit (amu, u, or 'dalton')
modern 'standard' isotope for the relative atomic mass scale carbon-12 (C-12)
total mass of the atoms in the formula of any compound formula mass
total mass of the atoms in one molecule of a covalent compound molecular mass
mass in grams of an element equal to its atomic mass gram-atomic mass (g.a.m.)
mass in grams of a compound equal to its formula mass gram-formula massn (g.f.m.)
mass in grams of a covalent compound equal to its molecular mass gram-molecular mass (g.m.m.)
mass of a substance that contains one mole (6.02x10^23) particles molar mass
mole amount of substance that contains Avogadro's # of representative particles
mass relationships (Ex: % composition) derived from chemical formulas formula stoichiometry
% of the mass of a substance contributed by a particular element or part percent (%) composition
ionic compound with a set ratio of water molecules attached which stabilizes its structure hydrate
water molecules attached to the formula unit to stabilize the crystal structure of a hydrate water of hydration
meaning "without water", it describes the (powdery) form of a hydrate if the water of hydration is driven out anhydrous
name this compound: CuSO4•5H2O copper (II) sulfate pentahydrate
name this compound: CaCl2•2H2O calcium chloride dihydrate
write the formula for magnesium sulfate heptahydrate MgSO4•7H2O
simplest whole number ratio of atoms or ions forming a compound empirical formula
represents the # and kinds of atoms in one particle of a covalent compound, even if not the simplest ratio (Ex: butane = C4H10, not C2H5) molecular formula
volume of a gas that contains Avogradro's # (6.02 x 10^23) particles molar volume
molar volume of a gas under 'standard' conditions of temperature and pressure 22.4 liters
acronym for "standard temperature and pressure" STP
'standard' temperature on the celsius and kelvin (absolute) scales 0 °C or 273 K
'standard atmospheric (air) pressure" in atmospheres, torr (mm of Hg), and kilopascals 1 atm or 760. torr (mm of Hg) or 101.3 kPa
SI unit of pressure (equal to 1 N/m^2) pascal
1000 pascals or 1000 N/m^2 kilopascal
'honorary' name for 6.022 x 10^23 chemical units Avogradro's number
means "attached (or added) to" rather than "multiplied by" in chemistry
molecular mass for water (H2O) 18.0 grams
representative particle for ionic (metal + nonmetal or polyatomic ion) compounds formula unit
representative particle for covalent (nonmetal + nonmetal) compounds molecule
representative particle for most elements atom
representative particle for diatomic elements (diatomic) molecule
diatomic elements mnemonic BrINClHOF (or H + 7@#7)
representative particle for NaCl formula unit
representative particle for H2O molecule
structured ('railroad tracks') system for performing chemical conversions (ex: grams <---> moles) factor-label method
factor-label method technique of checking and canceling units to make sure problem is set up correctly dimensional analysis
representative particle for Fe, Ne, Ca... atom
representative particle for H2, 02, Cl2... molecule
Created by: goakley



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