Calculations YEAR 10 Flashcards
1
Q
Define empirical formula
A
The simplest ratio of atoms in a compound
2
Q
Define molecular formula
A
The actual number of atoms in a compound
3
Q
Avogadro’s number
A
6.02 x 10*23 particles
4
Q
Mass =
A
Mass = Moles x Relative atomic mass
5
Q
Moles =
A
Moles = Mass / Relative atomic mass
6
Q
What does Mr mean
A
Relative Atomic Mass
7
Q
Molar gas volume
A
24 dm cubed
8
Q
What is a limiting reagent
A
It determines how much of a product can be formed
9
Q
What does “in excess” mean when referring to reagent
A
More reagent is present than needed
10
Q
Anhydrous definition
A
A substance with no water chemically bonded to it
