how to do limit reactant for chemistry just in case(sort of)

for chem just in case josh or kevin start asking me how to do this

[@strangefr]

Just what I needed to learn before I went to bed

[@kevgaming25]

THANK YOU

[@TreeStal]

how to do limit reactant for chemistry but not sort of?

[@dogdog3162]

can you tell kevin's mom to stop leaving me on read?