C4 ) Stoichiometry Flashcards
1
Q
What is Mr?
A
the sum of relative atomic massses (Ar)
2
Q
What s Avagadro’s number?
A
6.02 x 10^23
3
Q
what is a mole?
A
an amount of substance containing 6.02 x 10^23 particles
4
Q
what is the equation that relates number of moles, mass, and relative atomic/molecular mass?
A
number of moles = mass/Mr or Ar
5
Q
what is molar gas volume at RTP?
A
24 dm^3
6
Q
what is the equation that relates number of moles, volume, and molar gas volume?
A
number of moles = volume/molar gas volume (24 dm^3)
7
Q
how many cm^3 are there in 1 dm^3?
A
1000 cm^3 = 1 dm^3
8
Q
what are the units for concentration?
A
g/dm^3 or mol/dm^3
9
Q
what is the equation that relates number of moles, volume and concentration?
A
number of moles = volume x concentration
10
Q
what is a limiting reactant?
A
the reactant that is used up first
