Formulas Flashcards
(11 cards)
1
Q
relative atomic mass
A
(atomic mass x abundance) + (atomic mass x abundance)/sum of abundance
2
Q
Moles by mass
A
moles =mass(g)/Mr
3
Q
Moles by volume
A
volume(dm^3)= moles x 24(dm^3)
4
Q
Percentage yield
A
actual/theoretical x 100
5
Q
concentration and moles
A
concentration(mol/dm^3)= moles/volume(dm^3)
6
Q
Faradays
A
coulombs/96000
7
Q
Coulombs
A
coulombs= current x time(s)
8
Q
Energy
A
Energy= mass of solution x 4.18x temp change
E=MCAT
9
Q
Molar enthalpy change
A
energy transferred/moles= kJmol^-1
10
Q
Enthalpy change
A
total energy to break bonds- total energy in making bonds
11
Q
rate of reaction
A
amount of product formed or reactant used/time
