amounts of a substance Flashcards
what is the symbol for amount of a substance
n
what is the symbol for avragados constant
NA
what is the value of avragados constant
6.022 x 10^23 g/mol^-1
equation for amount of a substance
n=m/mr
n= mass/molar mass
what is percentage yield
how much of a particular product you get from the reactants compared to the maximum theoretical amount that you can get
what is actual yield
the number of moles or mass of product obtained experimentally
what is theoretical yield
the number of moles or mass obtained by a reacting mass calculation
equation for percentage yield
% yield =actual yield/theorectical yield * 100
what is atom economy of a reaction
how many of the atoms used in the reaction become the desired product
equation for atom economy
=molar mass of desired product/
sum of molecular masses of ALL reactants * 100
when will atom economy always be 100%
when it is an addition reaction and when there is only one product
this is because all of the atoms are used to make the desired product
