Flashcards in Chapter 3 Deck (8)
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0
Q
Avagadro’s number
A
6.02 x 10^23
1
Q
The Mole
A
a unit of measurement that represents 6.02 x 10^23 atoms
2
Q
Molar mass
A
The mass of one mole of an element or substance. Expressed in gmol^-1
3
Q
Number of particles
A
Number of particles = number of moles x Avagadro’s number
4
Q
Percentage composition
A
percentage by mass of each element in the compound:
- % of x in compound containing x =
mass of x in compound mass/molar mass of compound x 100/1
5
Q
Hydrated ionic compounds
A
Contain water of crystallisation
6
Q
Empirical formula
A
Simplest whole number ratio of elements in a compound
7
Q
Molecular formula
A
- the same as, or some simple multiple of, an empirical formula
- specifies the exact number of each type of atom in a molecule of the compound.