AMOUNT OF SUBSTANCE Flashcards
1
Q
Amount of substance
A
used to calculate the number of particles in a substance (n)
2
Q
Avogadros constant
A
number of particles in each mol of carbon 12 6.02x10²³
3
Q
Molar mass
A
Mass in grams of each mole of a substance
4
Q
Mass=
A
MrxMoles
5
Q
Mr=
A
Mass÷Moles
6
Q
standard solution
A
A solution of a known concentration
7
Q
Moles=
A
Mass ÷ Molar mass
8
Q
Units for molar mass
A
gmol- kgmol-
9
Q
Moles=
A
concentration x volume
10
Q
Assumptions for molecules making up ideal gas
A
-elastic collisions
-no intermolecular forces
-random motion
11
Q
Empirical formula
A
12
Q
Percentage yield
A
The deficiency of which reactants are converted into products
13
Q
Reasons why you’ll ever get 100% yield
A
- reactants may be impure
-side reactions could occur
-some products may be released into the atmosphere
14
Q
Percentage uncertainty
A
Uncertainty
——————x100) x 2
Reading.
15
Q
Concordant results
A
Titres within 0.1cm3 of one another
