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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.