Maths Flashcards
1
Q
Rf value
A
Distance travelled by solute divided by distance travelled by solution
2
Q
Theoretical yield
How much should I make?
A
Divide mass you are told but the relative mass of that compound.
Multiply by the relative mass of what you want
3
Q
Percentage yield
How much was made compared to what should be made?
A
Divide the actual yield by the theoretical yield
Multiply by 100
4
Q
Percentage composition , how much of one element
A
Multiply relative mass of an element by the number of its atoms in the compound
Divide by the total relative mass of the compound
Multiple by 100
5
Q
Relative mass of isotopes, what is the average mass?
A
Multiple each isotope by the percentage abundance
Add up the answers
Divide by 100
