If you have the equation
c(s) + y(g) --> 3 b(g)
and you add a large amount of c, will it speed up the reaction or slow it down?

Assuming the conditions of the reaction are maintained and appropriate for the reaction to still occur, the reaction rate can be affected by increasing the concentration of the reagents used in a reaction. It will speed it up.

Idon’t know sorry i don’t know the answer i’m s sorry

Iwould you figure it out but you don't have a picture or in your question as to what the physical property you're looking for is