Download Syllabus Cambridge International A & AS Level Chemistry Syllabus code 9701

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6. Appendix
6.2 Summary of key quantities and units
The list below is intended as a guide to the more important quantities which might be encountered in
teaching and used in question papers. The list is not exhaustive.
Quantity
Usual symbols
SI unit
mass
m
kg, g
length
l
m
time
t
s
electric current
I
A
thermodynamic temperature
T
K
amount of substance
n
mol
temperature
θ, t
°C
volume
V, v
m3, dm3
density
ρ
kg m–3, g dm–3, g cm–3
pressure
p
Pa
frequency
v, f
Hz
wavelength
λ
m, mm, nm
speed of electromagnetic waves
c
m s–1
Planck constant
h
Js
electric potential difference
V
V
(E ) E
V
electromotive force
E
V
molar gas constant
R
J K–1 mol–1
half-life
T½, t½
s
atomic mass
ma
kg
Ar
–
molecular mass
m
kg
relative molecular mass
Mr
–
Base quantities
Other quantities
(standard) electrode redox
relative
} potential
{ atomic isotopic } mass
Cambridge International A & AS Level Chemistry 9701. Examination in June and November 2012.
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