Topic 2: Amount of substance Flashcards
1
Q
Avogadros number
A
6.02x10^23
2
Q
Concentration equ’n
A
Moles/volume
3
Q
Moles equ’n
A
Mass/Mr (n=m/mr)
4
Q
Mr/Ar in grams
A
1 mole of an atom/ molecule is its Ar/Mr in grams
5
Q
Ideal Gas Equation
A
PV=nRT
6
Q
P unit in gas equation
A
Pressure (Pa)
7
Q
V unit in gas equation
A
Volume (m^3)
8
Q
R unit in gas equation
A
Gas constant (8.31)(JK^-1mol^-1)
9
Q
T unit in gas equation
A
Temp. (K)
10
Q
Empirical Formula
A
Simplest whole number ratio of atoms of each element in a compound.
11
Q
Molecular Formula
A
The actual number of atoms of each element in a compound.
12
Q
hydrating molecular and empirical formula questions
A
13
Q
Ammonium
A
NH4^+
14
Q
Nitrate
A
NO3^-
15
Q
Sulfate
A
SO4^-2