Stoichiometry PowerPoint

Conservation of Mass
• All of the atoms present at the start are still present
at the end; they have simply been rearranged into
new combinations.
• It’s sort of like the world’s coolest Lego set. You
have some basic building blocks, and you can
make all sorts of great stuff.
• This is true for all chemical reactions and
processes.
Formative assessment: Unit 9, 5 clicker questions.