mass
amount
molar mass
concentration
solution volume
gas volume
molar gas volume
Avogadro
constant, L
number of
entities, N
M1.2 RECAP: SETTING UP AMOUNT–AMOUNT RATIOS & MANIPULATING THEM
You may have noticed that in setting up these expressions, the amount we are required to obtain is usually placed as the LHS numerator at the outset. For many, this makes the subsequent algebra more user-friendly.
In the teaching, understanding and learning of such an important sub-topic, the stoichiometric factor is a crucial item which generally receives too little attention, and - not uncommonly - confusion ensues from here.
WORKED EXAMPLE 2
Oxygen gas can be converted to ozone by the intense, solar UV radiation present in the upper atmosphere. This filtering of harmful rays has allowed life on Earth to flourish.
There now follow some problems dealing with these key ideas about amounts ratios and
the interpretation of stoichiometric coefficients in order to generate a stoichiometric factor.
