amount of substance Flashcards
1
Q
particles =
A
6x10^23 x moles
2
Q
moles =
A
G / Mr
3
Q
conc =
A
mol / vol
4
Q
(in gas) vol =
A
moles x 24
5
Q
ideal gas equation =
A
PV = nRT
6
Q
how to convert from kelvins to degrees?
A
degrees + 273
7
Q
empirical formulae
(3 steps)
A
- take the % or g and divide by Ar
- use the smallest moles to divide all answers
- need a whole number ratio
8
Q
reacting masses
(3 steps)
A
- find the moles for a given chemicals mass
- ratio - moles of another chemical
- find the mass of chemical in question
9
Q
% atom economy =
A
total mass of desired product / mass of total reactants x 100
10
Q
what are the advantages of a chemical process with a high atom economy?
A
its cheaper and and it is a ‘greener’ process as less waste is produced
