amount of substances Flashcards
1
Q
1 moles contains
A
6.02 x 10 ^23 atoms/molecules
2
Q
how do we calculate the number of particles
A
Avogadros number X Number of moles
3
Q
how do we calculate moles
A
moles= mass/mr
4
Q
how do we calculate the number of moles in a solution
A
moles= concentration(moldm-3) X volume (dm3)
5
Q
ideal gas equation
A
pV=nRT
6
Q
p=
A
pressure( Pa)
7
Q
V=
A
volume ( m3)
8
Q
n
A
number of moles
9
Q
R=
A
Gas constant (8.31 JK-1 mole-1 ) given in exam
10
Q
T
A
temperature ( K)
11
Q
converting units
A
m—x-10 —-dm—-x10——cm
m2——x100——dm2——x100—–cm2
m3——x1000——dm3—–x1000—–cm3
12
Q
1Kpa=
A
1000P
13
Q
relative atomic mass (Ar)
A
the average mass of one atom compared to one twelfth of the mass of one atom of carbon-12
14
Q
relative molecular mass (Mr)
A
the average mass of a molecule compared to one twelfth of the mass of an atom of carbon-12.
15
Q
degree celsius to K
A
+ 273
