Studied by 2 people
Looks like no one added any tags here yet for you.
mole
an amount, defined as the number of carbon atoms in exactly
6.02×10^23
Avogadro’s number
Representative Particles
smallest pieces of a substance
molecule
Representative Particles for a molecular compound
formula unit
Representative Particles for a ionic compound
atom
Representative Particles for an element
molar mass
generic term for the mass of one mole of any substance (expressed in grams/mol)
gram molecular mass
molar mass for molecules
gram formula mass
molar mass for ionic compounds
gram atomic mass
molar mass for elements
gases
Many of the chemicals we deal with are in the physical state as:
temperature and pressure
What two things effect the volume of a gas
22.4L, molar volume
At STP, 1 mole of any gas occupies a volume of ____________, called the ___________
mass / volume
density = what / what
g/L
for the density of a gas the units will be:
density x volume
mass = what x what
accepted value
the correct value based on reliable references
experimental value
the value measured in the lab
error
accepted value – exp. value
Can be positive or negative
percent error
the absolute value of the error divided by the accepted value, then multiplied by 100%
empirical formula
the lowest whole number ratio of atoms in a compound
molecular formula
the true number of atoms of each element in the formula of a compound
empirical
Formulas for ionic compounds are ALWAYS _______
moles
A formula is not just the ratio of atoms, it is also the ratio of ________
percent composition
We can get a ratio from the __________
