Equations Flashcards
1
Q
mol dm-3 to mol cm-3
A
divide by 1000
2
Q
m3 to cm3
A
multiply by 1x10^6
3
Q
dm3 to cm3
A
multiply by 1000
4
Q
pV =
A
nRT T = kelvin R = 8.314 n = mol p = Pa V = m^3
5
Q
percentage error =
A
(uncertainty x no. readings) divide by measurement
- multiply by 100
6
Q
no. molecules =
A
moles X avogadros constant
7
Q
no. atoms =
A
moles X avogadros constant X no. elements atoms
8
Q
no. electrons =
A
moles X avogadros constant X relative formula mass
9
Q
q =
A
m X c X temp change
10
Q
enthalpy change =
A
q divide by moles
11
Q
lnk =
A
-Ea/RT + lnA
12
Q
k =
A
ln2/t1/2
13
Q
gradient (k) = -Ea/R
A
-Ea/R
14
Q
Mole fraction =
A
no. moles of a gas/ total moles of gas in mixture
15
Q
Partial pressure =
A
mole fraction X total pressure
16
Q
pH =
A
-log(H+)
17
Q
conc of H+ =
A
10^-pH
18
Q
Ka =
A
10^-pKa
19
Q
if delta G = 0
T =
A
enthalpy change/delta S (divide by 1000)
20
Q
Delta G
A
Delta H - (T X delta S)
21
Q
E cell =
A
E cell (red) - E cell (ox)
