Stoichometry Flashcards
1
Q
What is RAM/how do we find it out
A
Average weight of the isotopes if the element.
Percentage/amount x mass number e.g 35 chlorine
2
Q
What is RFM/how do we find it out?
A
Total mass of the molecule
Add up the masses of the molecule
3
Q
How to find percentage composition using RFM
A
Find RFM. Divide by what you want by RFM x 100
4
Q
How to find the mole of a substance
A
Find the RFM then add the unit, grams
5
Q
Simple mole formula
A
N.O of moles = mass/mass of 1 mole
6
Q
How to find formulae with moles
A
Combining masses / number of moles. Turn into a ratio
7
Q
Equation for Charge (Coulombs)
A
Coulombs = Current (amps) x time (seconds)
8
Q
Calculating mass, electrolysis
A
Find charge, then electron number x faradays (92,000), Coulombs÷total charge x atomic mass
