In a first–order reaction (a → b and rate = k [a]), tripling the concentration of a will have what effect on the reaction rate?

a it will stay the same.

b it will increase by a factor of three.

c it will decrease by a factor of three.

d it will increase by a factor of two.

Your answer is b just got done doing mine .

Exothermic,  physical change after it is already baked

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.