Stoichiometry Flashcards
1
Q
Relative atomic mass
A
Mass number of isotope
2
Q
Relative molecular mass (Mr)
A
Sum of RAM of each atom in a molecule
3
Q
Relative Formula Mass
A
RAM sum in a formula
4
Q
Amount of substance (n)
A
Number of a chemical species (e.g atoms) in a quantity
5
Q
Moles (mol)
A
n’s unit
6
Q
Avogadro’s Constant (L,Na)
A
6.02*10^23 mol-1
7
Q
Molar Mass, M
A
Mass per mol. Unit = g mol-1
8
Q
n=
A
Mass(g)/molar mass
9
Q
Moles from solutions
A
n=c*V
n= amount of substance, mol c= solution concentration, mol dm-3 V= solution's volume, dm3
10
Q
Molarity
A
Concentration in dm-3 aka g dm-3
11
Q
r.t.p
A
298K (25degrees)
100kPa
12
Q
1mol gas
A
24dm3~
13
Q
Ideal Gas Equation
A
pV=nRT or pV=m/M RT
p= pressure (Pa) V= volume (m3) T= temperature (K)
m= gas sample (g) M= gas' relative molecular mass R= 8.31 J K-1 mol-1
14
Q
cm3 to m3
A
*10^-6
15
Q
dm3 to m3
A
*10^-3
