Amount Of Substance Flashcards
what is relative atomic mass
the ratio of the average mass of one atom of an element to one twelfth of the mass of an atom of carbon-12.
what is relative molecular mass
the ratio of the average mass of one molecule of an element or compound to one twelfth of the mass of an atom of carbon-12.
what is the equation that link moles, conc and volume
n=cv
what is avagadros constant
- number of particles in a mole
- 6.023 x 10^23
what is the equation linking moles mass and mr
moles = mass / mr
what is the ideal gas equation
PV = nRT
what unit is pressure in in PV = nRT
pascals
kPa -> Pa = x1000
what unit is volume in in PV = nRT
m^3
cm^3 -> m^3 = divide by 1000000
what unit is temperature in in PV = nRT
kelvin K
degrees celcius -> kelvin = +273
what is empirical formula
the simplies whole number ratio of the atoms of elements present in the compound
what is molecular formula
the actual number of atoms of elements present in the compund
how do you calculate empirical formula
convert into moles
divide by smallest moles
ratio
formula
what is equation for % atom economy
(mr of desired products / mr of products ) x100
including stoichiometry
what is equation for % yield
(actual moles / theoretical moles) x 100
importance of % yield
shows amount of reactants that get converted into your desired product
