GFM
What does GFM stand for
Gram Formula Mass
What is the formula for percent composition
mass by part/mass of whole X 100
What is mole concept used for
To convert moles and grams in a substance
What is mole ratio used for
To determine the # of moles of each species needed for a balanced equation
Lowest whole # ratio of atoms in a compound
GFM of H2O
18.0 g
%O in H2O
0.89%
What is the formula for mole concept
number of moles = given mass/GFM
On board
H
What is molecular formula
The true formula of a substance
GFM of CO2
44.0 g
%Cl in ClNe2
0.47%
How many moles of water are present in a 10 g sample
0.56 mol
5 moles of Ti2 will produce how many moles of TiS
10 moles
Emprical formula of N4O2
GFM of Fe2NO
141.8 g
%P in P2Br2
0.28%
What mass of FeO2 would be needed to obtain a 0.75 mole sample
65.93 g
8 moles of S4 will produce how many moles of Ti2
8 moles
Emprical formula of C6H12O6
CH2O
GFM of Cu2Ne3H3
190.8 g
%Pb in Pb3O2Cl3
0.82%
How many moles of glucose are present in a 32 gram sample
0.18 mol
How many moles of Ti2 is needed to yield 9 moles of TiS2
4.5 moles
Ca3Mg9