100
As part of a lab students are using baking soda, corn starch, and water. When the lab is done there is some left over powder in the beaker. This is the place that students should dispose of the leftover powder.
What is the designated receptacle?
(solids don't get placed down the sink, left over NEVER go back into the original containers, and materials should not be thrown in the trash unless your teacher advises you that it is okay to do so)