In an experiment, having too many variables

a might solve the problem faster
b could solve more than one problem
c will cause too many problems
d will not matter

Having too many varibles will cause to many problems.

Explanation:

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

chemistry sucks a**

explanation: